May 01, 2026 Communications 27

Division 27 – Communications

27 05 00 General Requirements

General:

Architect to coordinate with the Dallas ISD-EdTECH A&O designated representative to integrate Dallas ISD’s District-Wide Premise Wiring Specification into the school’s design. This collaboration is to start at the Schematic Design phase and continue until construction is complete. This specification has been developed to establish a level of quality, performance and consistency throughout Dallas ISD.

Contracting Method: Architect is to include T-series drawing in the Contract Documents to define the routes, equipment for the routes, raceways, locations of equipment and the locations of drops. General Contractor to install the infrastructure to house cabling system. Dallas ISD-EdTECH A&O to contract with a Cabling Contractor to install cabling and equipment.

Coordination: Refer to the Responsibility Matrix in Division 01. Architect, including their technology consultant, and Dallas ISD-EdTECH A&O are required to coordinate during all phases of the project.

All low‑voltage infrastructure support systems—including sleeves, conduits, backboxes, cores, cable trays, vaults, network‑closet racks, ladder systems, and any related components—will be provided and completed by the General Contractor in full compliance with NEC requirements and all specifications outlined in these guidelines.

The Architect and their IT consultant will provide reasonable accommodation for new sleeves into existing IDFs and the MDF where required but currently not available.

E‑Rate and Bond Program Coordination:

New Construction/Additions: Require full technology and technology supporting systems as a part of the project.

Renovations: Receive E‑Rate funded network maintenance separate from full construction projects.

Technology Systems Impact on Other Building Systems: The electronic devices of the technology systems generate heat and require protection from electrical power fluctuations, surges and electromagnetic fields. The mechanical and electrical systems to address the support and protection required for year‑round operation of these technology systems.

If a major change in available technology occurs during design (For example Category 7 cable standards are released and the product is available) Architect(s) and/or BICSI certified RCDD are to submit a design waiver requesting a change to Dallas ISD Designated Representative.

Reference the following Divisions for additional requirements to be coordinated:

Division 06 – Wood, Plastics and Composites, Division 11 – Equipment, Division 12 – Furnishings, Division 21 – Fire Suppression, Division 26 – Electrical, Division 28 – Electronic Safety and Security.

May 01, 2026 Communications

Technology Definitions and Acronyms:

AWG American Wire Gauge

BICSI Building Industry Consulting Services International, Inc.

CMP Communications Plenum Cable

CMR Communications Riser Cable

COW Computer On Wheels

Data Port Single Category 6e or newer jack connected to a single cable segment

Duplex Electrical Outlet

Two (2) electrical receptacles

Duplex Dataport

Two (2) Single Category 6e dataports or newer

EF Entrance Facility

EIA Electronic Industries Alliance

Electrical Outlet

Single 120 Volt power receptacle

EMT Electrical Metallic Conduit.

ER Equipment Rooms (i.e. MDF, IDF)

FDC Fiber Distribution Center (Rack or Wall Mounted)

FOC Fiber Optic Cable

GC General Contractor

GRC Galvanized Rigid Conduit

HVAC Heating, Ventilation, & Air Conditioning

IDF Intermediate Distribution Frame

IMC Intermediate Metallic Conduit

ID Interactive Display

ITS Information and Technology Services

MDF Main Distribution Frame

MPP Multipurpose Plenum Cable

MPR Multipurpose Riser Cable

OFNP Optical Fiber Non‑Metallic Plenum Rated

OFNR Optical Fiber Non‑Metallic Riser Rated

OTD Optical Time Domain Reflectometer

Portable Permanent classroom space (not swing space)

POS Point of sale

PSTN Public switched telephone network

RDP Rate Demarcation Point

Quad‑ Electrical Outlet

Four (4) electrical receptacles

RCDD Registered Communications Distribution Designer

RMU Rack Mount Unit (1.75 inches)

SCS Structured Cabling System

Swing Space Temporary portable building in support of construction

TIA Telecommunication Industry Association

TMG Telecommunications Main Grounding Busbar

TR Telecommunication Room

UL Underwriters Laboratory

UPS Uninterruptible Power Supply

UTP Unshielded Twisted Pair

VoIP Voice over IP or Voice over Internet Protocol

WAP Wireless Access Point

May 01, 2026 Communications 27

Technology Symbols: The following symbols are to be used for consistency between Architect's drawings, General Contractor submittals, and vendors contracted directly by Dallas ISD. Coordinate with the MEP engineers so as not to create confusion due to similar symbols in their sets.

Data Device Symbols

Device Symbol Description

New Data Outlets:

Four-pair unshielded twisted pair cable run, category as specified. “x” indicates number of cable runs (jacks). If there is no number indicated there shall be one cable run (jack).

Typical

POS

Wall-Mounted

Coordinate exact height and placement with Architect (typically at +48” aff.).

Floor-Mounted

Power-Over-Ethernet (IP-based camera)

Standard installation requires a single cable run for signal, control and power. Use keynotes to designate specific requirements for installations such as wall-mounting or non-standard power configuration.

Bio-Clock Coordinate exact height and placement of J-box with Architect (typically at 48 inches A.F.F. to top of single gang back box).

Other Symbols:

Existing Data Outlet

Multimedia Outlets (teacher station A/V)

Note to refer to specifications and details. All other audiovisual (A/V) applications to be identified using keynotes.

Keynotes “X” indicates keynote identifier. Keynotes to be identified in series with letters (Example: Keynote N).

Table 27 05 00-01: Data Device Symbols x x POS x W x BC x x E

CAM x

M

X

Wireless Access Point Symbols

Device Device Device

Wireless Access Point (WAP):

Exterior Wall-Mounted

Exterior sleeving requirements:

• Provide 1" EMT sleeve with bushings through exterior wall at a height not greater than 14 feet and in line with other devices such as security cameras. In some cases, sleeve may be larger to include a backbox and flat metal face plate

• Route sleeve within 1st floor ceiling into adjacent lower ceiling towards cable pathway/cable tray.

• Require sleeve to be trimmed at face of masonry (maximum 1/4” protrusion).

• Fire stop on both ends and slope at 1:10 to the outside to prevent

• moisture infiltration.

• WAP installation does not require predrilled or precast anchor support.

Interior Wall-Mounted

WAP’s may be mounted on sheetrock walls. Exception: In gymnasiums, mount WAP’s on masonry or concrete walls. Mounting on sheetrock walls in gymnasiums requires additional support and prior approval from IT-Infrastructure.

Interior sleeving requirements:

• Provide sleeve/conduit and backbox at height not greater than 14 feet and in line with other devices such as fire/clocks.

• Route sleeve/conduit into adjacent lower ceiling towards cable pathway/cable tray.

• WAP installation does not require predrilled or precast anchor support.

• Classrooms above 14 feet A.F.F.: On wall adjacent to cable tray at 12 feet. Provide back box and conduit.

• Gymnasium and Auditoriums above 14 feet A.F.F.: On wall at 12 feet. Provide back box and conduit.

Ceiling-Mounted

Standard lay-in ceilings (less than 14 feet A.F.F.): Mount at center of classroom or as required to provide appropriate coverage in other areas. Locate at main tee for support. Coordinate locations at office areas with Dallas ISD-EdTECH A&O.

Hard ceiling or non-standard ceiling tile (ex: 4”x4”): Architect to coordinate locations with IT-Infrastructure.

Open ceiling: Cabling to be in continuous conduit and terminate into a double gang backbox.

Table 27 05 00-02: Wireless Access Point Symbols

Intradisciplinary Requirements:

Furniture / Casework / Millwork:

Design team to coordinate communications requirements at all furniture/casework/millwork locations.

Refer to Divisions 06 and 12 for additional requirements.

Cabling:

Typical, Category 6 or newer cabling.

Refer to Responsibility Matrix in Division 01.

Pathways and Raceways:

Pathways and raceways are the support system for the infrastructure. All inside, outside, above ground or underground horizontal and backbone cables are to be supported by systems including, but not limited to the following:

Cable trays. Sized on a project/trunk specific basis.

Independent cable j-hook hangers. Sized on a project/trunk specific basis.

Raceways cast into the concrete floor systems and raised flooring systems are not allowed without a Dallas ISD Design Waiver.

Surface raceway systems are allowed only for renovations and only at concrete/CMU walls where it is impractical to penetrate the existing wall construction.

Where allowed, raceways must meet the following requirements:

Provide enclosed metal raceways and boxes.

Design/install so as to be as discrete as possible with little or no disturbance to classroom functionality or aesthetics.

Installation of more than one (1) vertical raceway per wall shall be avoided where practicable.

Acceptable products: Legrand|Ortronics or Dallas ISD approved equal.

Verify layout for large rooms with more than standard number of drops, additional entrances into the room, or vertical drops with Dallas ISD-EdTECH.

New Construction/Additions:

Preferred method is a combination of cable trays and j-hook hangers.

Cable trays are to be used for main horizontal cable pathways to and from MDFs and IDFs.

Cable trays are to be installed in the main hallways and any open ceiling areas. Color to match ceiling finish color.

Use independently supported j-hook hangers where cables exit the cable tray system and run to the termination points.

Surface raceway systems and boxes are not allowed.

All backbone cable to follow cable tray pathways.

Category 6 and auxiliary system cables are to be combed and independently bundled. Category 6A and newer cables are to be independently bundled but not combed per industry standard recommendations.

Bundle straps are to be easily removed for the addition or removal of cables and are to be plenum rated.

The primary cable routes are to be located over corridors for future maintenance and access.

Plenum‑rated cabling, cable support hardware and cable ties are required in plenum‑rated and above‑ceiling spaces.

Wall boxes: A 1-inch conduit with a pull string is to be included at each wall box. The conduit is to extend from the wall box to accessible ceiling above the wall providing a clean pathway for data cables.

Refer to the Responsibility Matrix in Division 01.

Renovations:

Support above classrooms or office spaces outside of the MDF and IDF to use independently supported j-hook cable hangers. These hangers are to be suitable for installation of Category 6 or newer cables and support bend radius applications.

At Hallways: Provide cable tray for support.

Surface raceway systems are allowed only at concrete/CMU walls where it is impractical to penetrate the existing wall construction.

Firestopping:

New and existing raceways, conduit sleeves, cable trays, and cables for power, data, and communications systems penetrating non‑rated and fire‑ rated floors, walls, and other partitions of building construction are to be fire‑ stopped where they penetrate new or existing building construction.

Architect to include the following requirements at a minimum in the Contract Documents:

Verify that cabling and other penetrating elements and supporting devices have been completely installed and temporary lines and cables have been removed.

General Contractor is responsible for firestopping all MDF and IDF sleeves, cores and cable pathways.

Refer to Section 27 15 01 for additional requirements.

Electrical:

General:

Dedicated Isolated Ground Circuits: Orange colored receptacles.

Wall outlets to be provided in all areas except for the power clusters in IDF and MDF.

Renovations: At STB phase, Architect to inspect all existing network closets, including each IDF and the MDF, to verify power capacity and compliance with district‑standardized power cluster requirements. Architect to coordinate with Dallas ISD-EdTECH during the Design Development (DD) phase to incorporate the required power cluster upgrades into the construction documents.

Outlets Required in Center of Rooms:

Design for use of floor boxes. Flush‑faced, floor mounted with whips to outlet box. Run conduit from floor box to nearest wall. Run within wall to 6 inches above suspended ceiling.

Tombstone outlets or data/power poles are not allowed.

Design must ensure that floor box outlets for both power and data must be coordinated with type of data faceplates specified for project. Additional accommodations required for mounting to fit specified data faceplates to be the General Contractor’s responsibility.

Grounding:

Grounded power outlets to use separate ground wire run from each outlet box back to a common, dedicated, isolated earth ground.

Dedicated isolated ground circuits are not required outside the MDF/IDF closet unless required by code.

Provide each power outlet and the data outlet with separate back boxes.

IDFs & MDF Grounding

Design Team to ensure that every network closet included in any project— new construction, renovation, or addition—is designed with a properly bonded and grounded busbar in accordance with all applicable codes and standards.

Electrical power in MDF/IDF rooms to be provided via dedicated isolated ground circuits.

All racks and ladder trays to be grounded.

Refer to Division 26 for additional requirements.

Architect to include the following requirements at a minimum in the Contract Documents:

The General Contractor shall furnish and install grounding conductors and shall properly bond each network closet busbar to the building’s grounding system in full compliance with NEC requirements.

Grounding work shall be completed, inspected, and approved prior to the installation of any network switches or other active network equipment.

Renovations/Additions:

3.2.6.1.3.1 Existing network closets found to be improperly grounded, insufficiently bonded, or otherwise non-compliant must be reported in the STB Scope Validation Report.

3.2.6.1.3.2 The Contractor shall not proceed with equipment installation in the affected closet until appropriate corrective measures have been approved and completed.

Compliance and Verification: All grounding installations and corrective actions shall comply with NEC guidelines, project specifications, and Dallas ISD standards. Verification documentation shall be submitted as part of the project closeout requirements.

Electrical Panels:

Distribution panels for the technology system (ex: MDF/IDF equipment, classroom computers, interactive displays, projectors, et al.) are to be isolated from all other panels and contain only technology power. This includes isolation from all lighting.

Panels to be labeled as “Technology” electrical panels.

Shared circuits between rooms are not allowed.

Technology panels to be coordinated with Division 26.

Surge Protection:

Technology electrical distribution panels to be provided with surge protectors.

Surge Protectors to be mounted close to panels.

Refer to Division 26 for additional information.

Telecommunications Entrance Facilities Surge Arresters and Suppressors:

Provide carbon or gas charged elements connected to all copper lines running into the building from outside service providers and between buildings (ex:. to portable buildings, field house, remote entrance gates, etc.) and central distribution sites on campus.

Copper cable runs between buildings. Refer to Responsibility Matrix in Division 01.

Campus-Wide Infrastructure:

Voice Communications:

Refer to Responsibility Matrix in Division 01 for division of scope between General Contractor and Dallas ISD contracted vendor.

Architect to coordinate with Dallas ISD-EdTECH A&O to assure compliance.

Phone systems and service to the building to be provided by Service Provider.

Locate outlets for public pay phones, complying with accessibility standards, as directed by Dallas ISD.

New Construction/Additions:

Voice over IP (VoIP) telephony system.

IP phone digital handsets to will be provided by Dallas ISD-EdTECH at the following locations. Refer to Responsibility Matrix in Division 01 for division of cabling scope.

4.1.5.1.1.1 Front Desk.

4.1.5.1.1.2 Office Manager.

4.1.5.1.1.3 Principal’s Office.

4.1.5.1.1.4 Police Department Office.

4.1.5.1.1.5 Campus Safety Specialist.

4.1.5.1.1.6 Reset Rooms.

4.1.5.1.1.7 School Counselor.

4.1.5.1.1.8 School Nurse.

4.1.5.1.1.9 SPED Classroom Teaching Station.

4.1.5.1.1.10 Collegiate Academy Office.

4.1.5.1.1.11 Performing Arts Offices.

4.1.5.1.1.12 Coach’s Office (at High Schools only).

4.1.5.1.1.13 JROTC.

4.1.5.1.1.14 Custodial Supervisor.

4.1.5.1.1.15 Cafeteria Supervisor.

Switched ethernet data network.

VoIP phones to plug into the planned data drops. Additional drop for phone is not required.

Enhanced 911(E-911) system to be routed through local PSTN gateway serving the following functions:

911 calls.

Emergency backup.

Critical mass notification

Emergency Responder Communication Enhancement System (ERCES):

Provide conduit for installation of future ERCES from Storm Shelter IDF to roof. Architect to coordinate exact location and pathway requirements with Dallas ISD-CSS.

Wireless Call Out:

Fire Alarm Systems: AES.

Security Systems: Hands-free operated phone with a direct phone line to allow access to Dallas ISD-Central Dispatch.

Elevator Emergency Dialer System: Refer to Division 14 for requirements.

Additions:

Architect to review potential expansion of existing PBX system, when required, into any office spaces in the additions with Dallas-MFS during the Design phase.

If addition includes a new MDF closet space, Architect to coordinate with Dallas ISD-MFS for direction on relocating existing PBX equipment and data/phone wiring infrastructure to the new MDF space.

Renovations:

Existing facilities to verify with Dallas ISD-MFS whether the facility will continue to use PBX systems currently installed or will be updated to VoIP on a project specific basis.

Phones are not required to be added to existing classrooms.

Refer to Figure 27 05 00-01 for typical voice and data configuration.

Figure 27 05 00-01: Voice/Data Outlet Configuration

Point of Sale (POS) Terminals:

Cafeteria:

Two (2) data outlets (RJ45 wall plates) per POS terminal.

Cafeteria Manager’s Office:

Four (4) data outlets (RJ45 wall plates).

Interactive Displays and Projectors:

Refer to Project Delivery Guidelines for required scope coordination with Dallas ISD- EdTECH.

Multimedia Outlets:

Provide 2-inch conduit run and 4-11/16-inch square x 3 inch deep box with 1 inch extension ring at outlet location.

Coordinate blocking and quads with multimedia outlet locations. Refer to Figure 29 05 00-06.

Display locations provided in Dallas ISD-EdTECH standard display package:

Multimedia outlet devices are provided and installed by the Dallas ISD- EdTECH Cabling Contractor. Refer to Dallas ISD Educational Specifications.

Additional display locations not provided in Dallas ISD-EdTECH standard display package: Architect to include multimedia outlets to match typical configuration.

Refer to Figure 27 05 00-02 for typical configuration.

Figure 27 05 00-02: Multimedia Outlet Configuration

Fiber Optic Backbone Cabling (between, to and from portable buildings):

General Contractor is responsible for installation of all fiber optic pathways, conduits (with bushings), sleeves, grounding and wall cabinets to complete fiber optic installation. Dallas ISD- EdTECH A&O contracted vendor is responsible for the installation of the fiber optic, fusion splicing, weatherproof splicing enclosures or splice boxes (coyotes). Where special conditions need it, Dallas ISD- EdTECH A&O may request that Architect and Architect contracted Technology Consultant design a fiber pathway (ex: storm shelter IDF/MDF).

All portable buildings to be connected to the campus network. From MDF, install a 24 fiber 50/125 micron multimode optical cable to a weatherproof cabinet or splice box that is centrally located among the portable buildings. Cabinet to be mounted overhead in the walkway cover. From this cabinet, install 6 fiber 50/125 micron multimode optical cable to each portable building (up to 4 portable buildings). Multimode fiber cable to be installed and secured to structure in the walkway cover.

Provide one (1) wall‑mounted lockable cabinet. Terminate all fibers within the cabinet for connection to Dallas ISD provided network switch. All fiber optic cable strands are to be terminated, tested and certified.

Install three (3) Category 6 data ports or newer within each classroom within the portable.

All Category 6 or newer cables run to the wall‑mounted cabinet and terminate on the patch panel.

Classrooms in portable buildings are to have the same general layout and meet the same connectivity and multimedia outlet/device standards as standard classrooms.

Construction Swing Space: Provide for a wireless connection in lieu of cabled connection unless directed otherwise by Dallas ISD Designated Representative.

Wireless Access Points (WAP):

Wireless access points to be connected to the Dallas ISD network. Locations and number of access points to be established as part of initial site survey.

Design of WIFI coverage and WAP placement to be based on site survey maps for minimal interference and Dallas ISD-EdTECH A&O WAP device baseline dBm signal strength as set by the WAP device manufacturer.

Dallas ISD-EdTECH A&O WIFI engineer to be consulted by Architect and Architect contracted Technology Consultant for wireless coverage design.

Refer to Wireless Access Point Symbols table for placement guidelines.

Prior to installation, Dallas ISD-EdTECH A&O or WAP Contractor to perform a detailed radio propagation survey after the physical building structure is complete and major systems installed. Any variations in recommended locations and/or quantities are to be resolved and updated on Contract Documents as directed by Dallas ISD Designated Representative.

The following components are to be installed for each WAP.

One (1) Category 6A or newer cable from the MDF or closest IDF to a point above the ceiling. Where no lay-in ceiling is available route to a point 1 foot below the ceiling, with the WAP to be mounted on the wall. In both cases the data port is to be terminated within a standard box that can be moved for adjustment.

Low voltage power for the access points is POE based and provided through the data cable from the network switch.

All cables and patch cords are to be labeled. Label existing patch panel to identify location. Dallas ISD-EdTECH A&O contracted vendor to provide patch panel identity label on ceiling grid and green dot.

Provide 15 feet of cable slack at WAP.

When WAP installation is required within a potentially damaging space such as a gymnasium, the WAP unit is to be in protective enclosure or a location that the WAP cannot be damaged from gymnasium activities.

Printers:

Confirm designated printer locations, types, models and sizes to ensure correct power voltage and receptacle match designed use.

Room Specific Requirements:

IT-Infrastructure Network Rooms (MDF/IDF):

General Requirements:

MDF and IDF rooms should be labeled with room number and sequential room name for identification. (ex: 116 MDF, 156 IDF 01, 201 IDF 02, 309 IDF 03, etc.).

MDF and IDF locations to be determined based on maximum cable run lengths:

Cable runs are to not exceed 250 feet in total length (including vertical and horizontal runs) to any device location from the network room.

Architect and Architect contracted Technology Consultant to calculate vertical and horizontal cable path runs. Calculation to include two (2) patch cords at 15 feet each and two (2) service loops at 10 feet each (total 50 feet).

Distances to storm shelter, competition gyms and auditorium areas to be verified to avoid the necessity for additional, corrective IDFs.

Dallas ISD-EdTECH A&O contracted vendor to test cables for length to conform to passing if they are under 300 feet with patch cords included.

Floors are to be a level, smooth hard sealed concrete surface. Refer to Division 09 for additional requirements.

Wall and floor surfaces are to be light in color, flat sheen to minimize light reflection.

IT-Infrastructure Network Room Counts:

Dallas ISD-EdTECH A&O is to be consulted any time a network distribution room is to be constructed that does not conform to the base configuration requirements listed in this document.

Typical Room Counts by School Classification:

Elementary School: One (1) MDF and three (3) IDFs.

Middle School: One (1) MDF and four (4) IDFs.

High School: One (1) MDF and nine (9) IDFs.

Dimensional Requirements:

MDF and IDF rooms to be designed to accommodate wall space for access control panels. A minimum 4 foot by 8-foot area of wall space to be provided with sufficient 3-foot panel door swing clearance from the nearest vertical wiremanager and post rack.

Access control panels are not allowed to be placed on front side wall of the post racks. Refer to Figures 29 05 00.3a and 4a for Typical IDF and MDF layouts and coordinate mounting locations with Dallas ISD-EdTECH A&O.

MDF and IDF room racks will be designed to accommodate space for security patch panels, switches, UPS’s and server.

New MDF Rooms:

Minimum 10 feet x 20 feet clear of unobstructed floor area.

Ceiling: 10 feet AFF.

Architect to obtain MDF layout approval from Dallas ISD-EdTECH A&O.

New IDF Rooms:

Minimum 10 feet x16 feet clear of unobstructed floor area.

10 foot ceilings, AFF.

IDFs to be placed so that no drop cable length exceeds 285 feet (86 meters) for the permanent link; or 328 feet (100 meters) for the complete channel inclusive of all cross‑ connects.

Door Access Controls:

Door locks provide for keyed access and be Proxy Card compliant and network integrated/managed.

Electronic access control to be compatible with the specified Open Option system. The system requires the following components.

Storeroom lock.

Card reader.

Door locking device.

Door control panel.

Typical installation with accessible wall and door frame (condition one):

Provide a door position contact and electric strike.

At solid wall construction or inaccessible walls and/or door frame (condition two): Provide the following:

Surface mounted door position contact mounted on secure side of door.

Surface mounted passive infrared reader.

Architect to coordinate requirements on a project specific basis with Dallas ISD-CSS and EdTECH A&O and include all required components in the Contract Documents.

Refer to Division 08 and 28 for additional requirements.

Climate Control:

MDF and IDF rooms are to be provided with stand-alone climate control system for cooling, heating, and humidity.

Systems are to be designed to meet the total climate control needs. The controls of the HVAC are to be programmed to run at appropriate settings at all times.

Power, including the climate system, for MDF/IDF rooms will only be shut-off for maintenance, repair, and construction improvement projects, but any shutdown must be pre-approved in writing from Dallas ISD-EdTECH A&O a minimum of 48 hours prior to activity.

Provide high heat room alert signal and call out. Confirm settings with Dallas ISD-EdTECH A&O.

Computer lab(s) are to be provided with climate control system for cooling and heating.

Communications closet: HVAC unit is not to be located over or obstruct access to any rack lines.

Confirm acceptable temperature range for equipment review with Dallas ISD- EdTECH A&O.

Heat Loads for Dallas ISD MDF and IDF Rooms

Room Type Minimum Load Maximum Load

MDF 20,500 BTU/hr 41,000 BTU/hr.

IDF 3,500 BTU/hr 7,500 BTU/hr

Table 27 05 00-03: Heat Loads

Refer to Division 23 for additional requirements.

Lighting:

MDF and IDF Rooms: Lighting to consist of LED lighting and controls.

Lighting levels must meet IES recommended and code required minimum light levels at all areas of the room.

Refer to Division 26 for additional requirements.

Fiber Optic Backbone Cabling (MDF-to-IDF):

Provide vertical/horizontal fiber optic backbone cabling to be 24 strands of fiber optic service. Refer to Figures 27 05 00-03 and 04 for typical MDF and IDF floor plan.

Provide fiber optic patch panels at each end sized for the number of fibers to be installed. Typical: Terminate all 24 strands of fiber with Type “LC” connectors. Connect 12 strands to patch panels and leave balance coiled in or behind bulkhead with protective covers in place as spares.

Renovations/Additions: Where new IDFs are added, install a new backbone from the MDF to each IDF consisting of 24 strands of fiber optic service. Refer to 27 05 00-03a and 04a for typical MDF and IDF floor plans.

Power:

Uninterruptible Power System (UPS) Design Criteria:

Not required at IDF closets except at Storm Shelter IDF. Refer to Division 13 for Storm Shelter requirements.

Individual UPS to be provided at each MDF closet. Eaton 9PX or Dallas ISD approved equal with Extended Battery Module (EBM) to meet continuous operation design criteria.

5.1.8.1.2.1 Individual UPS to be mounted to the four-post rack in MDF closet.

5.1.8.1.2.2 Additional UPS to be provided by Dallas ISD-CSS and PA contracted vendor(s) within separate allocated racks to power security equipment.

System is to provide 1 hour of continuous operation without degradation of the power supplying the MDF or other areas requiring UPS.

UPS to include appropriate modules or cards to allow ethernet or fast ethernet connectivity to the Dallas ISD data network (ex: RJ45 connection(s)).

UPS to include statistical non-parametric mapping (SnPM) functionality for monitoring and remote access into the system.

UPS to support power to all racks and cabinets within the MDF/IDF but not convenience outlets.

Renovations/Additions: Centralized UPS systems are not supported by Dallas ISD-EdTECH A&O except at Storm Shelter. If an MDF/IDF is being renovated, relocated or added, Architect and Architect contracted Technology Consultant to coordinate with IT-Infrastructure to replace existing centralized UPS systems with individual UPS at the existing/new

MDF/IDF.

Use power requirements in table below as a guideline or starting point for UPS design, configuration and sizing requirements.

Refer to Division 26 for coordination with electrical requirements.

Typical ITS Network UPS Power Requirements by School Classification

School

Type

No.

of Network

Rooms

Estimated

No. of

Drops

Provide UPS as

Required

Provide Feeders, Panels, Breakers & Outlets as Required

Minimum

UPS Units

(1 per closet)

KVA per

UPS

Unit

Min. Total

KVA power from UPSs

Commercial

Electrical Power

Clusters

Elementary

School

4 576 1 3 3 13

Middle

School

5 960 1 3 3 16

High

School

10 1920 1 3 3 31

Notes: This model assumes that switches in each power cluster offer 96 ports w/ full PoE support (or 60 PoE+ ports)

1. The architect and IT consultant to design at 80% of the power that a 3 KVA DISD IT

Infrastructure specified UPS can support for 1 hour.

2. This design configuration is for a single UPS to support not more than one (1) switch chassis of 240 ports. Additional UPS will be required for a cable count of more than 240.

3. The architect and IT consultant must advise DISD It Infrastructure designated representative when an additional UPS is needed on any closet.

4. This model assumes that not all PoE ports will be in use simultaneously

Table 27 05 00-04: Typical ITS Network UPS Power Requirements

Power Cluster Requirements:

Any single power cluster is to be used to power no more than 200 network drops.

If more than 500 data ports are planned, solution including total number of racks, power clusters, UPS count and room size to be coordinated with Dallas ISD-EdTECH A&O.

Provide a single power cluster per rack installed. Locate behind each rack, mounted at 7'-3" at the top of the horizontal ladder rack. Refer to Figures 27 05 00-03 and 4.

All power clusters in MDF/IDF to be dedicated isolated ground circuits, labeled to identify "Technology" electrical panel and circuit.

A single power cluster at each rack in the MDF/IDF consists of:

5.1.8.2.5.1 Two (2) L6-30 receptacles for UPS at MDF only.

5.1.8.2.5.2 Two (2) 208vac/20amp with L6-20 twist lock receptacles on two (2) commercially powered circuits.

5.1.8.2.5.3 Two (2) 120vac/20amp quad 5P-20 receptacles on two (2) commercially powered circuits.

Refer to Division 26 for additional information.

Rack Requirements:

MDF to have one (1) open four-post rack and three (3) two-post racks with vertical wire managers (front and rear) at both ends and in between the racks.

IDFs to have one (1) open four-post rack and two (2) two post racks with vertical wire managers (front and rear) at both ends and in between the racks.

More than the number of racks indicated above may be required in a given room to support more drops than required in a base configuration. Architect and Architect contracted Technology Consultant to review rack counts, drop counts and room sizes with Dallas ISD-EdTECH A&O during the Design Development phase and adjust the design as required on a project specific basis.

Network Room (MDF/IDF) Equipment:

Refer to the following diagrams for typical MDF and IDF layouts:

The following keynotes apply to Figures 27 05 00-3-4:

KEYED NOTES TO MDF, IDF OVERVIEW and Elevations

LEGEND DESCRIPTION

1 4-POST RACK (OPEN) FOR UPS: Properly label MDF Rack 1

2 2-POST RACK: Properly label MDF Racks as Rack #1, #2, Rack #3, etc.

3 Vertical Cable wire management for front and back of racks

4 Infrastructure Support System: 12” wide ladder rack arranged around all room walls and near mid-span across room.

Labeled Power Cluster gang boxes installed behind each of the racks at the top of the ladder rack comprises dedicated circuits of:

• NEMA 2 X L6-30

• NEMA 2 X L6-20

27 05 00

KEYED NOTES TO MDF, IDF OVERVIEW and Elevations

LEGEND DESCRIPTION

• 2 QUADS

6/6A 6 denotes ISP fiber provider termination box (UPN) 6A denotes horizontal fiber terminations (DISD)

7 4 Quantity of 4" HILTI speed CP653 conduit sleeves for horizontal cabling through wall placed at optimum location where ladder rack and cable tray meet.

8 Dedicated Air Conditioning: See TDGs for additional information.

9/9A/9B

9 Freestanding cabinet: PA/Mass Notification rack: Campus Security Group 9A Wall mounted A/V Rack: M&F Sound Stage group 9B Freestanding cabinet: Security rack with rack mounted UPS for video surveillance server only:

Campus Security Group

10 Access Control Panel (ACP): Campus Security Systems

11 Grounding busbar at 8’-0”A.F.F.

12 Any other wall mounted equipment devices

Preferred location of core drilled/ floor sleeve location for all IT trades. Quantity to be determined by IT Infrastructure and Design team based on function and cable pathway. Provide 2 Quantity 4” diameter for fiber to MDF from ISP fiber provider’s street Demarc (UPN) point.

15 Drawing title applicable to specified network room.

16 Minimum clearance of 24" from back of the 4-post rack to the wall

17 Minimum clearance of 24" from side vertical wire management to wall

18 Minimum clearance of 36" from the front of all the racks to the front wall

19 NO EQUIPMENT ON FRONT SIDE WALL OF THE POST RACKS

20 Preferred Door Location

21 Electrical Conduits feeding power clusters run outside and above rack or ceiling

KEYED NOTES TO MDF, IDF OVERVIEW and Elevations

LEGEND DESCRIPTION

22 Fire rated plywood (3/4” AC Grade) installed on every wall from floor to 8’6” AFF, bottom at 6” above floor. For each board, leave fire grade stamp when painting

23 Mount any sprinkler heads in MDF/IDF per specs to wall (NOT SHOWN). No heads over equipment or panels on racks.

24 Standard 120V-20A convenience receptacle at +18” AFF spaced at 6 ft intervals

25 4-post rack mounted UPS system.

26 Minimum interior width, MDF=10ft, IDF=10 ft, 27 Minimum interior length, MDF=20 ft, IDF= 16 ft, 28 Ladder Rack Height 28A is fire rated ¾” AC grade plywood height

29/29A

29 & 29A denote IT Infrastructure while

29B IT Security patch panels

30/30A

30 & 30A denote IT Infrastructure Network Switches

30B IT Security Switches

31 Radius Transitions required to guide cable drop from ladder to vertical wire manager

32 6 AWG grounding wire run into a 2-hole ground lug secured with a bolt and nut onto a metal surface. Scrape paint to bond to metal

33 Provide electrically approved grounding wire to house ground/ steel I-beam system

34 Suspended ceiling height at 8’-6” minimum but prefer 9 feet clear height.

CR Card Reader Access Control: Room must be secured at all times

Figure 27 05 00-05: Keyed Notes to MDF, IDF Overview and Elevations

Refer to Figure 27 05 00-3a-c for typical MDF plan layout and elevations.

Figure 27 05 00-03a: Typical MDF Plan Layout

Figure 27 05 00-3b: Typical MDF Front Elevation

Figure 27 05 00-3c: Typical MDF Side Elevation

Refer to Figure 27 05 00-4a-c for typical IDF plan layout and elevations.

Figure 27 05 00-4a: Typical IDF Plan Layout

Figure 27 05 00-4b: Typical IDF Front Elevation

Figure 27 05 00-4c: Typical IDF Side Elevation

Typical MDF rooms to include the following equipment:

Open frame racks with ladder rack cable tray installed from the rack to the wall for stability and cable support.

Twenty‑four (24) or forty‑eight (48) port, Category 6 or newer angled patch panels for termination of the horizontal cable plant served from this room.

Category 6 or newer patch cords provided by responsible vendor per Responsibility Matrix in Division 01. Patch cords, panel locations and associated cabling cannot be mixed between Dallas ISD-EdTECH A&O, CSS, PA, and Sound.

Fiber optic patch panels where fiber backbone from each Public Service provider, IDF and portable building are terminated.

Fiber optic jumpers installed on patch panels are to be 5 meters in length, pending individual installation requirements.

One (1) dedicated security rack with rack mounted UPS for installation of surveillance servers and termination of camera cables.

Space for a floor or wall-mounted Dallas ISD PA system rack.

Provide fire rated plywood backboards (4 feet x 8 feet x 3/4 inch ACX) on all walls of MDF/IDF's for terminations and other auxiliary equipment Plywood to be installed with the smooth good face exposed to the room. If painted, leave the fire rating identification type & class of plywood unpainted and legible.

Fire Alarm annunciator and control panels.

Elevator cab emergency call-out to be wireless system.

Rack mounted power strips.

Renovations: Where addition of an IDF closet is not feasible, IT equipment is to be housed in lockable, free‑standing equipment cabinets with enough room in them to allow for cable management to the sides of, in front of or behind the equipment. Preferred location is inside the teachers’ breakroom.

New rack is to be mounted with a minimum of 24 inches clear from the side of the rack and 36 inches clear from the front. There are two different types and sizes of racks: four (4) post rack and two (2) post racks. Rear space to be 24 inches clear from the four (4) post rack. (See diagram)

Main grounding bus bar connected to the main building grounding system.

Rate Demarcation Point (RDP): RDP equipment for interface to the Public Switched Telephone Network or high-speed data circuits. Typically, these services are arranged for and ordered by Dallas ISD-EdTECH Staff. They are cabled / installed from the property line to the facility Demarc by the various service providers. Dial tone (or data system connectivity) is provided / configured / tested by the various service providers. Contact Dallas ISD-EdTECH early in the design phase to assure coordination of the work and schedule.

Cable runway system (ladder racks) to be installed above the racks in the MDF and IDFs to support and manage the backbone and horizontal cables entering the room to the racks and equipment within the room. Each rack is to be secured to the nearest wall. Use manufacturer recommended termination and entrance equipment such as waterfalls, support, and bonding equipment.

Ladder racks to be a minimum of 12 inches wide.

Two (2) of the 4-inch cabling conduit runs from the MDF to the common handhole near the property line to be for use by Dallas ISD-EdTECH contracted high speed internet vendor. All other services to use the third 4-inch conduit.

All service providers to provide their own conduits, pathways and or handhole from outside/within the property line needed to tie their service into the common handhole to be able to pull services to the MDF. Architect and General Contractor to be provided with services approach details and approve or reroute where conflict with other buried or surface services is determined.

Service provider(s) are to install cabling between property line and RDP Demarc and make arrangements to provide dial tone and/or data system connection services into the facility. Contact Dallas ISD-EdTECH A&O early in the design phase to assure coordination of the work and schedule.

Typical IDF rooms to include the following equipment:

All proximal horizontal cabling, cross‑connects, and network equipment to be housed either in the telecommunications room (TR) or IDF.

One (1) or more open frame rack(s) with horizontal and vertical cable management. When open floor mounted racks are used, install ladder rack cable tray from the rack to the wall for stability and cable support.

Dedicated space for security.

24 and/or 48 port, Category 6 or newer angled patch panels for termination of the horizontal cabling for that area.

Category 6 or newer patch cords for each service provided by the responsible vendor as defined by the Responsibility Matrix in Division 01.

Rack mounted fiber optic patch panel for termination of the fiber optic backbone.

Duplex fiber optic jumpers of a quantity to fully connect installed patch panels. 20% to be 3 feet (1 m) in length, 30% to be 6’ feet (2 m) in length and 50% to be 9 feet (3 m) in length.

Back of ladder rack mounted power clusters.

Classrooms:

Typical Cabling:

Three (3) Category 6 or newer data ports in each typical classroom (Figure 27 05 00‑05 below). Locate data ports as follows:

One (1) Category 6A data port for WAP mounted at the ceiling or wall.

Teaching Wall (Refer to Figure 27 05 00-02):

5.2.1.1.2.1 Provide two (2) data cables as follows:

5.2.1.1.2.1.1 One (1) data port at 18 inches A.F.F. at the multimedia teaching wall faceplate.

5.2.1.1.2.1.2 One (1) data port behind the Audio Video Smart TV Display Unit as shown on the teaching wall Display elevation Figure 27 05 00-06.

5.2.1.1.2.2 Provide one (1) HDMI connector on wall plate at 18 inches A.F.F.

5.2.1.1.2.3 Provide two (2) HDMI cables as follows:

5.2.1.1.2.3.1 One (1) HDMI cable connected from the PC device to the multimedia wall HDMI connector outlet located 18 inches A.F.F.

5.2.1.1.2.3.2 One (1) in‑wall HDMI cable routed from the multimedia wall HDMI connector outlet located 18 inches A.F.F. up to the Audio‑Video Smart TV Display, passing through the brush wall plate behind the display.

Teacher’s Desk (Station): One (1) dataport for computer.

All Category 6 cables or newer, run to the nearest IDF and terminate on rack mounted modular patch panels.

Each dataport faceplate is to be paired with a quad electrical outlet (four (4) receptacles) to be located within 18 inches. Electrical receptacles to be installed as two (2) duplex‑electrical outlets or one (1) quad‑electrical outlet.

One (1) duplex power behind the interactive display location.

Interactive Displays:

Interactive Display system design standards are the default for new, existing and remodeled classrooms. Alternate systems or variance of 5% or more in the diagrams below to only be allowed if preapproval is obtained from the Dallas ISD-EdTECH A&O.

Diagrams provide placement information for the interactive display (Figure 27 05 00‑05). Multimedia Outlet Detail is shown in Figure 27 05 00‑01.

New Construction / Additions: Library/Media, entry lobby, feature areas, conference rooms, specialty rooms, large teaching areas, et al: The interactive display requirements are to be evaluated and confirmed for each project and condition.

Renovations: Existing spaces are to be configured to have Teaching Wall Interactive Display with coordinated connectivity, (ex: HDMI connectivity).

Infrastructure Requirements (behind display):

One (1) Duplex‑electrical outlet, centered behind Interactive display.

One (1) HDMI connector on wall plate and one (1) HDMI cable in the wall to wall plate below at 18 inches AFF. Coordinate with IT Infrastructure if Category 6 data cable is needed for the wall plate to be mounted on mud ring adjacent to electrical outlet.

Blocking: 48 inches x 24 inches x 20 ga. galvanized sheet metal secured to metal stud assembly. Plywood blocking is not allowed.

Infrastructure Requirements (below display):

One (1) quad outlet, centered with Interactive display.

One (1) Multi‑media outlet: see diagram for types.

Wall Rough‑In: Power, data, conduits, boxes, bushings, mud ring, pull strings, et al. Refer to Figure 27 05 00-06.

Figure 27 05 00-05: Typical Classroom Layout

Figure 27 05 00-06: Teaching Wall Display

Conference Rooms, Specialty Rooms, and Large Teaching Areas:

Cabling is similar to classrooms.

Requirements are to be evaluated and confirmed for each project and condition.

Conference Rooms: Confirm the user endpoint termination as it may be located under or in the conference room table or on the wall opposite the circulation side of the conference room table (away from the doorway).

Typical Computer Lab:

Provide Category 6 or newer dataports as follows:

Student Computers: Thirty (30).

Teacher Station: One (1).

Teaching Wall: Two (2).

Printer Locations: Two (2).

All Category 6 or newer cables run to the nearest IDF and terminate on dedicated rack mounted modular patch panels, one (1) each lab. Each lab to have its own dedicated patch panel leaving eight (8) ports for growth and in support of separate virtual LANs within the network switch configuration.

Dataports are to be paired, within 18 inches, with two (2) electrical outlets. Electrical outlets to be installed as duplex‑electrical outlets or quad‑electrical outlets.

Testing Lab/Room:

Requirements similar to computer lab, but confirm requirements with Dallas ISD-EdTECH.

Typical Administrative Area Cabling:

Reception:

Provide data at rack behind reception desk.

Secretary and receptionist to have computer stations located on desks away from the reception counter.

A/V Display (Includes HDMI cabling). Verify with the IT – AV designated representative.

PA Display (Includes cabling). Verify with Dallas ISD-CSS.

Printer Locations: One (1).

Workstations:

Provide two (2) Category 6 dataports and a quad electrical outlet.

Data cables to terminate on patch panels mounted in racks or cabinets located in the nearest IDF or MDF.

Printer Locations: One (1) per area.

Offices:

Two (2) Category 6 dataports, located to allow the phone (VoIP) and computer (data) to be placed on the desk and/or the credenza with the cabling passing through the desk return.

A/V Display (Includes HDMI cabling). Verify with the IT – AV designated representative.

Printer Locations: One (1).

Conference Rooms:

A/V Display (Includes HDMI cabling). Verify with the IT – AV designated representative.

Auditorium:

A/V Display (Includes HDMI cabling). Verify with the IT – AV designated representative.

JROTC:

Provide five (5) to ten (10) LAN drops at conference table. Coordinate with Dallas ISD Designated Representative.

Provide ten (10) LAN drops at JROTC supply storage room.

Provide ten (10) LAN drops alongside wall at range.

JROTC WAP's to accommodate 40-50 devices per WAP.

Coordinate requirements with Dallas ISD Designated Representative on project specific basis.

Library:

Number of drops to be adjusted based on size of room.

Provide data jack at circulation desk.

Provide four (4) data drops at each power outlet.

Coordinate exact locations with Dallas ISD-Media Services.

Storm Shelter: Refer to Division 13 for additional requirements.

Contract Document Requirements:

General:

Architect to place the Responsibility Matrix on the T-series drawings.

The Architect is to assign room numbers, with the assistance of Dallas ISD, to the Construction Drawings. These room numbers are to be used throughout the project in submittals, for the labeling of cabling, for assignment of telephone numbers, and on as‑ built schedules and drawings. Refer to Division 01 of the TDGs for room numbering requirements.

Label all cabling based on the room number system for the facility.

For existing locations where additional cabling and data drops are being added, all existing data ports are to be surveyed and included on design drawings with a unique symbol thereby providing complete documentation of the room.

The Contract Documents are to require the Contractor developing the submittals for the technology infrastructure to have an employee on staff who is a BICSI certified RCDD to produce the Design Documents.

Site Plan to Show:

Building’s footprint, MDF, and areas for future expansion.

Fiber Optic service route.

Existing or new telephone service lines, high speed internet service, electrical services and the proposed underground routing of conduits and duct banks.

Floor plans and associated sheets to meet the following requirements and include the following information:

MDF & IDF locations:

Cable run lengths to not exceed 250 feet to any area of the building.

Locations in the center portions of building.

Cable Routing:

Coordinated with structure and mechanical infrastructure.

Cable tray locations.

Penetrations to rooms from cable trays: Provide two (2) penetration points in large rooms.

Provisions for future expansion to be determined with IT – Infrastructure designated representative.

Enlarged Plans with Furniture Layouts:

Typical classroom.

Science labs.

Computer labs.

Offices.

Libraries: Coordinate with bookshelves.

Other specialty rooms.

Enlarged Plans to Coordinate:

HVAC.

Electrical: Dimension electrical drops to critical equipment.

Data Drops: Dimension data drops to critical equipment. Include spacing of outlets in computer lab or science lab and heights above floor for outlets.

Computers.

Printers and scanners.

TVs.

Interactive Displays and any Projectors.

Interactive White Boards (IWBs) – Marker boards.

Doors and windows including effect…