VSBP-3_Product Specification_6Nov2024_DRAFT.pdf

i

FEDERAL AVIATION ADMINISTRATION (FAA)

VOICE SWITCH BYPASS 3 (VSBP-3)

Product Specification

6 November 2024

DRAFT

Contents

1.0 DOCUMENT PURPOSE

2.0 SYSTEM REQUIREMENTS AND CHARACTERISTICS

2.1 MAJOR SYSTEM COMPONENTS AND CIRCUIT TYPES

2.1.1 VSBP Configuration

2.1.2 Circuit Types

2.2 POWER

2.2.1 Internal Power

2.2.2 External Interfaces

2.3 TECHNICAL PERFORMANCE

2.3.1 Voice Channel Performance

2.3.2 C-Message Noise

2.3.3 kHz Background Noise

2.3.4 Headset/Handset (HS) Volume Control

2.3.5 Transmit Path

2.3.6 Headset Receive Audio Path

3.0 APPLICABLE DOCUMENTS

4.0 TECHNICAL DESCRIPTION OF COMPONENT PARTS

4.1 CABINET REQUIREMENTS

4.1.1 Cabinet and Frame Construction

4.1.2 Cabinet and Frame Pre-Wiring

4.1.3 Cable Entrance and Exit

4.1.4 Distribution Panels

4.1.5 Overheat Warning

4.1.6 Cable Connectors

4.1.7 Cable-end Terminations

4.1.8 Power Cables

4.1.9 Recycled Material

4.1.10 Fungus

4.1.11 Plastics

4.1.12 Color and Finishes

4.2 “19 X 7” EQUIPMENT SHELF

4.3 BLANK-OFF PLATE

4.4 BACKPLANE

4.5 UNINTERRUPTIBLE POWER SUPPLY (UPS)

4.5.1 Mechanical Characteristics

4.5.2 Electrical Characteristics

4.6 RELAY MODULE

4.6.1 Mechanical Characteristics

4.6.2 Electrical Characteristics

4.6.3 Interface

4.7 DUAL 9-WAY ACTIVE DATA BRIDGE MODULE

4.7.1 Mechanical Characteristics

4.7.2 Electrical Characteristics

4.7.3 Interface

4.8 FUSE MODULE

4.8.1 Mechanical Characteristics

4.8.2 Electrical Characteristics

4.8.3 Interface

4.9 POWER SUPPLY MODULE

4.9.1 Mechanical Characteristics

4.9.2 Electrical Characteristics

4.10 JACKBOX UNIT

4.10.1 Mechanical Characteristics

4.10.2 Electrical Characteristics

4.10.3 Interface

4.11 CABLES

4.11.1 Jackbox Cable

4.11.2 Connectorized Jackbox Cable

4.11.3 Radio Cable

4.12 66 TERMINAL PUNCH BLOCK

4.13 66 TERMINAL PUNCH BLOCK WITH 25 PAIR CONNECTORS

4.14 IDENTIFIER PANEL

4.15 POWER STRIP

4.16 UPS SHELF

4.17 DUPLEX OUTLET

4.18 10 AMP POWER SUPPLY

5.0 QUALITY ASSURANCE PROVISIONS

5.1 QUALITY REQUIREMENT

5.2 MECHANICAL DESIGN AND MANUFACTURE

6.0 TESTING REQUIREMENTS

6.1 RESERVED

6.2 PERFORMANCE TEST REQUIREMENTS

6.2.1 Data

6.2.2 Frequency 1 Circuit Types

6.2.3 Frequency 2 Circuit Types

6.2.4 Backplane Channel 3 One Position to One or Two Frequencies

6.2.5 Frequency 2 Circuit Tests for FAA Circuit Type 2

6.2.6 Backplane Channel 3 Two Position to One Frequency

1.0 DOCUMENT PURPOSE

This document provides a technical description of Voice Switch By-Pass component parts that, when configured together in a site-specific manner, provide Air Traffic Controllers emergency access to air-to-ground (A/G) radio transmitter and receivers during a failure of the voice switch system.

The Voice Switch By-Pass (VSBP) provides operators with EMERGENCY access to and control over government-furnished very high frequency (VHF) and ultra-high frequency (UHF) radio receiver/transmitters and associated signaling systems. The A/G connectivity enables air traffic controllers to establish and maintain communications with aircraft. The VSBP connections to A/G communications resources will be made by way of interfaces to government furnished distribution frames or other distribution points.

2.0 SYSTEM REQUIREMENTS AND CHARACTERISTICS

The VSBP equipment is typically installed in FAA Terminal Radar Control (TRACON), Air Traffic Control Tower (ATCT) facilities, and Mobile Tower Asset Trailers that operate under Instrument Flight Rules (IFR). Within these facilities and Trailers, designated air traffic control (ATC) positions equipped with a VSBP Jackbox have emergency air-to-ground communications capability in the event of a voice switch system failure.

The following are the minimum FAA requirements of the VSBP system:

1. The VSBP must be independent of the voice switch system.

2. The VSBP will provide direct connectivity between the controller and the air/ground radio equipment for the primary frequency (s) assigned to that operation position.

3. The VSBP will be activated by a positive action of the controller.

4. The VSBP must provide a push-to-talk (PTT) signal compatible with the PTT requirements of the interfacing primary radio system (local or remote).

5. The VSBP must provide an audio path (transmit and receive) compatible with the audio requirements of the interfacing primary radio system (local or remote).

6. The VSBP must be capable of manual reassignment and connection of radios to positions (e.g., reconfigurable by interface patch panel).

7. The VSBP must provide an interface compatible with the facility recorder system.

8. The VSBPs must be configured and equipped in accordance with facility work orders provided when each system is ordered.

2.1 MAJOR SYSTEM COMPONENTS AND CIRCUIT TYPES

2.1.1 VSBP Configuration

The site-specific configuration of Voice Switch By-Pass component parts consists of the following major units:

• A Cabinet housing one or more equipment shelves for the following modules/items:

o Uninterruptible Power Supply (UPS) o Power Supply Module o Fuse Module o Dual 9 Way Active Data Bridge Module o Relay Modules o Backplane o 66 Terminal Punch Block

• Jackboxes and associated cables. The Voice Switch By-Pass must interface with up to four (4) Jackbox Units per “19 x 7” Equipment Shelf depending on site specific Air Traffic Control requirements. Radio Cables interface the Voice Switch By-Pass to the appropriate radio equipment

2.1.2 Circuit Types

The three (3) circuit types are:

Type 1: enables 1 (one) Air Traffic controller to communicate on one specific frequency.

Type 2: enables 1 (one) Air Traffic Controller to simultaneously communicate on two specific frequencies.

Type 3: enables two Air Traffic Controllers to communicate on one specific frequency

2.2 POWER

Power (120 VAC) to operate the VSBP set of equipment is provided from a facility electrical panel board to a standard duplex outlet. The VSBP must include an Uninterruptible Power Supply (UPS). The UPS must support 1-3 “19 x 7” Equipment Shelves of modules, 1-5 “19 x 7” Equipment Shelves of modules, and 1-7 “19 x 7” Equipment Shelves of modules, and 1-7 “19 x 7” Equipment Shelves of modules.

2.2.1 Internal Power

The VSBP “19 x 7” Equipment Shelf must accommodate a Power Supply Module that is connected to either the VSBP UPS or the duplex outlet. Each “19 x 7” Equipment Shelf must contain one Power Supply Module powering the circuits within that shelf.

The failure of one internal power supply must not affect communications on other “19 x 7” Equipment Shelves within the Cabinet. In an emergency, two “19 x 7” Equipment Shelves can be powered by one Power Supply Module.

2.2.2 External Interfaces

The VSBP must provide external interfaces to radio receive, transmit and site recorder for the designated A/G frequencies. Push to talk (PTT) interface usually consists of “dry contact” type or "current loop" capability. Some of the applications require a DC voltage. Once determined, the correct method is configured by the placement of Backplane jumpers. Continuity (dry contact) from the radio must be provided by contact closure in the VSBP Relay Module. When "voltage" PTT or keying is required locally, a separate Power Supply Module is required.

The VSBP must interface with local radios that may or may not use a common antenna for the main and standby equipment. The relay switching within the VSBP must have the provision to interrupt the antenna M/S contact closure from the voice switching system and provide either an open, short or a voltage (voltage is externally applied) to operate the antenna relay.

2.3 TECHNICAL PERFORMANCE

2.3.1 Voice Channel Performance

The frequency response over the frequency range from 300 to 3000 Hz must not vary by more than +/- 3 dB of the value measured at 1000 Hz.

2.3.2 C-Message Noise

A/G C-message noise must not exceed 20 dBrnC0.

2.3.3 kHz Background Noise

Recorder Audio Radio Audio

Radio Audio

VSBP

Jackbox

Relay Module

VOICE SWITCH BY-PASS

Legal Recorder

Enable Switching Signal

Radio Audio

Dual 9-Way Active Data

Bridge Module

Frequency Number 2

Frequency Number 1

Voice Switch Interface

Voice Switch Jackbox

A/G 3 kHz background noise must not exceed 39 dBrn0.

2.3.4 Headset/Handset (HS) Volume Control

The Headset/Handset (HS) Volume Control must be adjustable from +10 dB to, -15dB from the nominal setting.

2.3.5 Transmit Path

The Transmit Path must have the following parameters:

Frequency response 300 to 3000 Hz +/- 3dB Harmonic distortion 2.5 percent maximum Interchannel crosstalk 60 dB below normal signal Noise Level 20 dBmC0 maximum

2.3.6 Headset Receive Audio Path

The Headset Receive Audio Path must have the following parameters:

3.0 APPLICABLE DOCUMENTS

The following documents form a part of this technical description to the extent specified herein. Copies of standards, drawings and publications may be obtained from the contracting officer.

SPECIFICATIONS:

Federal Aviation Administration (FAA)

• FAA-G-2100H Electronic Equipment, General Requirements (9 May 2005)

Federal Aviation Administration (FAA)

• FAA-STD-013d Quality Control Program Requirements (15 June 1994)

• FAA-STD-021 Configuration Control, contractor requirements (August

1987)

Military

• MIL-P-13949/4 Plastic sheet, laminated, metal-clad (for printed wiring boards) base material GE, glass base, woven, majority difunctional epoxy resin, flame resistant, copper-clad

• MIL-P-551110F Printed Wiring Boards, Gen. Spec. (31 May 1997)

• MIL-STD-1189B Bar Code Symbology (August 1992)

Frequency response 300 to 3000 Hz +/- 3dB Harmonic distortion 2.5 percent maximum Interchannel crosstalk 60 dB below normal signal Noise Level 20 dBmC0 maximum

• MIL-STD-129R Military Marking for Shipping and Storage (Sept 2019)

• MIL-STD-2073-1 Appendix E3 Department of Defense Standard Practice for

Military Packaging (May 2008) Federal AMS-STD-595 Colors (14 February 2017)

OTHER PUBLICATIONS:

• ASTM-D-3951-18 Standard Practice for Commercial Packaging (4 Oct 2023)

• ANSI/ASQC Q-9003-1994 Quality Systems Model for Quality Assurance in

Final Inspection and Test

• ECIA EIA/ECA-310-E Cabinets, Racks, Panels and Associated Equipment (1 Dec

2005)

• Standard UL 13, Power Limited Circuit cable requirements

4.0 TECHNICAL DESCRIPTION OF COMPONENT PARTS

The Voice Switch By-Pass set of equipment is a modular, site-specific configuration set of component parts. The following provides the mechanical, electrical and interface characteristics of the component parts identified in paragraph 2.1 Major Units, above. A site may be configured with one or more of each of these component parts.

4.1 CABINET REQUIREMENTS

The cabinet requirements are listed below but the final dimensions will be dependent on the site surveys to confirm available space.

4.1.1 Cabinet and Frame Construction

a) The equipment room cabinets and frames must not exceed a height of 85 inches

(2.16 meters), a width of 36 inches (0.91 meters), and a depth of 34 inches (0.86 meters).

b) The loading conditions of each fully equipped cabinet and frame must not exceed an average weight distribution greater than 125 lb/ft2.

c) The structural strength and rigidity of the cabinets, frames, and consoles must be such that normal handling in loading, shipping, unloading, and setting into position for installation will not result in any damage to the equipment. Removable equipment cabinet or frame-lifting devices (hooks, rings, etc.) may be installed for convenience to facilitate handling and installation.

d) Removal of equipment or modules or interchanging of equipment modules must not cause any deformation to the cabinets and frames.

e) Structural strength and rigidity of all cabinets must be independent of any strength or rigidity provided by access doors.

f) Removable components must not exceed the weight limits specified below so as to permit removal and replacement by one person:

1) For components up to three feet from the floor, 40 pounds.

2) For components between three feet and five feet from the floor, 33 pounds.

3) For components above five feet from the floor, less than 33 pounds.

4.1.2 Cabinet and Frame Pre-Wiring

a) All cabinet wiring must be provided with chafing protection in addition to the individual wire or cable insulation jackets.

b) Cable grounding must be in accordance with FAA-STD-019D.

Cabinet and frame convenience outlets.

c) The VSBP must provide at least two AC convenience outlets for each cabinet or frame (i.e., for use by technicians to power tools, test equipment, etc. during maintenance operations).

Note: Cabinet or frame includes central equipment racks, remote power racks, etc., regardless of location.

d) The AC convenience outlets must be independent of the primary power source for the equipment within the cabinets and frames, and in accordance with (index section number) of FAA-G-2100G.

4.1.3 Cable Entrance and Exit

a) The VSBP must provide access for interconnecting cables to enter through the top and bottom of the equipment cabinet.

b) Direct cabling through the sidewalls of cabinets, at least six inches above the floor, may be used within a subsystem where distance is considered a critical factor in circuit performance. Direct cabling must not preclude installation of additional frames, card cages, or other such items that may be required for future expansion of the VSBP as provided in

4.1.4 Distribution Panels

a) The VSBP must be provided with a distribution panel to facilitate the interconnection of all cables to the government equipment distribution frame(s).

b) The VSBP distribution panel must accommodate all interface requirements.

c) Cables must be provided to interconnect the distribution panel to the government equipment distribution frame(s), panels, or junction boxes.

d) VSBP distribution panels must accommodate the wired-for capacity of the system ordered for the site.

e) Protector frames must be provided as required by FAA-STD-019D.

Ventilation and cooling.

f) Each cabinet requiring forced ventilation must contain its own silent fan blower system requiring no external ducts.

g) The VSBP equipment must not malfunction with access doors and plates open, and drawers extended for servicing, for up to eight consecutive hours.

h) The VSBP must take in air from the bottom of the cabinet.

i) The VSBP cabinet must allow air intake from either below a raised floor or from floor level, by simple removal of cover plates or baffles.

j) Air filters provided with commercially available equipment and all equipment cabinets must be replaceable using only common hand tools.

k) Ventilation exhaust openings must be through the top of the cabinet and direct the exhaust upward and away from personnel and other equipment. Note: Top of the cabinet openings should prevent objects (i.e., hand tools) from being able to fall into the cabinet.

l) Exhaust outlet openings must not interfere with or be obstructed by cable routing.

s) For position equipment where fans are incorporated into the design, the position;

1) Must provide an indication of the failure of the fan module; and

2) Must utilize silent fans.

m) For each cabinet requiring forced ventilation, the VSBP must report at the supervisory and maintenance terminals and other locations to be designated at time of order any condition that would cause a ventilation problem (e.g., blower failure, clogged filters).

4.1.5 Overheat Warning

a) The VSBP must provide warning devices in each separate cabinet to indicate when the temperature exceeds the maximum safe operating temperature for the equipment within the cabinet.

b) The VSBP must provide a visual indication of overheating for each cabinet, readily visible from the front cabinet exterior.

c) The VSBP must provide a visible and momentary audible alarm at the supervisory and maintenance terminals and other locations to be designated at time of order, whenever cabinets overheat.

Interconnection cables.

d) All interconnection cables and connectors required for factory testing, equipment site installation, checkout, acceptance testing, cutover, operation, and maintenance must be compatible with both underfloor and overhead distribution and cable facilities provided by the government.

e) All such cabling must permit accessibility to equipment for test maintenance and replacement.

f) Cabling and wiring must comply with (index section number) of FAA-G-2100G;

National Electric Code, NFPA-70; and FAA-C-1217F.y) All interconnection cables must be provided with mechanically produced labels (i.e., not hand-written) at both end points of the cable, uniquely identifying their point of origin (i.e., the connector identifier and distribution point) and the signals being conducted on the cable.

Note: Labels should not be hand-written on the cable jacket. Labels should be printed with a label maker or a computer and should identify where the cable connects to the VSBP and what signals are on the cable. For example, “J14;

Position Legal Record Distribution Frame 1, Position Legal Record Audio for Positions 1-15.”

g) All interconnecting cables must be plenum-rated in accordance with NFPA-70 300- 22(c) and 800-53.

4.1.6 Cable Connectors

a) All cable connectors furnished on the equipment for making external connections must be clearly identified on the plug-in side by labels descriptive of their specific function and by the proper reference designation.

b) Cable connectors must be mechanically keyed to prevent incorrect installation and hookup.

c) The mating connector part (connector or plug) that is electrically energized must contain female contacts.

d) All cable connectors must be mechanically retained in place.

4.1.7 Cable-end Terminations

a) Signal cable end terminations must be solderless, quick-disconnect terminal blocks or mass termination connectors. Connectors that have insert-type contacts may be loaded with only the contacts actually used plus spares.

b) Power cable terminations must be screw-type terminal blocks, pressure contact terminal blocks, or connectors.

4.1.8 Power Cables

a) All AC power cables and wiring within the VSBP must be isolated from sensitive voice and signaling circuits.

b) Cabling must include all junction boxes, fittings, and distribution equipment (switches and circuit breakers from the government power source to the VSBP primary power panel). Nameplates and product marking. Identification of VSBP units must be in accordance with FAA-G-2100G, paragraph (section number), with the exception of (paragraph section number) Materials. Selection of materials must be consistent with the requirement of economically producing a system that performs its specified functions with ruggedness and durability.

4.1.9 Recycled Material

a) All electrical, electronic, or electromechanical parts used in the VSBP must be new.

b) Recycled metals or plastics may be used for mechanical or structural parts as appropriate. Toxicity. The VSBP must be constructed from materials of low toxicity, not producing dangerous gasses due to fires or toxic effects when used under specified environmental conditions for operating and non-operating equipment (see E.9).

4.1.10 Fungus

The materials chosen must be non-nutrient to fungus and insects, flame resistant, non-hygroscopic, and not adversely affected by the environmental conditions specified herein.

4.1.11 Plastics

Transparent plastics used in displays, selectors, backlighting, and related applications must not warp, soften, discolor, or otherwise be degraded in appearance or physical properties due to heat buildup encountered in normal operation.

4.1.12 Color and Finishes

a) All equipment racks and cabinets must be fully painted on all exterior surfaces and corrosion protected on all interior surfaces (painting permitted).

b) All surfaces must be prime painted in a neutral color.

c) The finish must be a baked enamel paint or equivalent.

d) All exterior surfaces must be free from burrs and sharp edges.

4.2 “19 X 7” EQUIPMENT SHELF

The “19 x 7” Equipment Shelf must be mountable in the Cabinet and must be a mounting shelf for a Power Supply Module, a Fuse Module, Dual 9 Way Active Data Bridge Modules, Relay Modules and the Backplane. The material used to construct the shelf must be 16-gauge steel with a black texture finish. The overall dimensions are 19 inches wide, by 20 inches deep by 7 inches high. The Cabinet mounting hole pattern must be in accordance with ANSI/EIA 310, Standard RS-310-C-77, 1U, 2U and 3U. There must be twelve slots for plug-in modules.

4.3 BLANK-OFF PLATE

The Blank-off Plate must fit any of the twelve plug-in module slots on the “19 x 7” Equipment Shelf to vertically cover the space of a plug-in module slot and must be attachable in the same manner as a plug-in module.

4.4 BACKPLANE

The Backplane for the “19 x 7” Equipment Shelf must be removable and must allow interface to the facility demarcation providing connectivity to A/G radio transmitters and receivers. The Backplane provides for a maximum of three circuit types, four Jackbox Unit interfaces, and seven radio channel interfaces. Jumpers and switches located on the rear of the Backplane must provide for antenna switching and provide for Push-to-Talk signaling.

The Backplane must be fabricated per MIL-P-13949/4, Grade A, Class 2, printed circuit board, fabricated per MIL-P-55110D, containing 2 each, 10 position, dual row headers, 1 each, 14 position dual row header, 10 each, 56 pin press-fit connectors, 4 each, 15 pin, female, press-fit connectors, 7 each, 25 pin, female, press-fit connectors and 1 each 8 pole, double throw, slide switch, 2 each, blocking diodes and 11 each shorting shunts. Backplane is 17.07 inches wide, 5.5 inches high and 0.12 inches thick. Backplane marking per FAA-G-2100 paragraph 3.3.3.2.

The Backplane receives 24Vdc from the Power Supply Module. The 24Vdc passes through the Fuse Module and must be distributed across the Backplane to its module interface connectors.

4.5 UNINTERRUPTIBLE POWER SUPPLY (UPS)

The Uninterruptible Power Supply is a 700 VA/490 W, or a 1000 VA/700 W, or a 1500 VA/1050W (depending on the load requirements of the facility specific configuration). The Uninterruptible Power Supply must be mountable, fitting into the Cabinet and resting on the UPS Shelf, a bottom shelf. The Uninterruptible Power Supply connects to the 120 Vac Duplex Outlet power source. The UPS power output to the internal VSBP set of equipment is 120 Vac.

4.5.1 Mechanical Characteristics

CAPACITY (VA) HEIGHT (IN.) WIDTH (IN.) DEPTH (IN) WEIGHT (LBS)

700 3.5 19.0 19.4 34 1000 3.5 19.0 19.4 34 1500 3.7 19.0 19.4 50

4.5.2 Electrical Characteristics

Input Voltage Range: 85 to 144 Vac Input Current: 5.4 to 12.5 A (depending on Uninterruptible Power Supply capacity) Input Power Factor: 0.95 Typical Frequency Range: 50/60Hz ± 3Hz Surge Protection: per IEEE 587/ANSI C62.41 Output Wave From: Sine wave Output voltage: 120 Vac ±3% Common Mode Noise Rejection Transverse Mode

>60 dB @ 100 kHz Noise Rejection Audible Noise

>80 dB @ 100kHz Audible Noise

Normal Mode 45 dBA Outlets 5-15R (4) Batteries: 12 Vdc, 5 Ah, maintenance-free rechargeable lead acid Agency approvals: Safety - UL 1778

EMC – FCC Part 15 Class A or B (Capacity dependent)

4.6 RELAY MODULE

The Relay Module mounts in a slot (A5, A6, A8, A9, A11, A12) on the “19 x 7” Equipment Shelf. The Relay Module must provide four independently operated relays. The relay contacts each provide four sets of form C transfer (break before make) contacts. Up to six (6) Relay Modules may be installed in one ’19 X 7” Equipment Shelf. The Relay Module must mate with a 56 pin connector on the Backplane.

4.6.1 Mechanical Characteristics

Weight: 9.5 oz max Height: 5.58 inches Width: 1.42 inches Depth: 5.96 inches

4.6.2 Electrical Characteristics

Coil Resistance: 1150 ohms ± 10% Must-operate voltage: 19 Vdc Must-release voltage: 2 Vdc Maximum contact current: 1 A Maximum apparent power: 10 VA Maximum contact voltage: 100 Vdc Typical contact operate time: 20 ms Typical contact release time: 60 ms

4.6.3 Interface

RELAY MODULE CONNECTOR PIN ASSIGNMENTS

INTERFACE K1 K2 K3 K4

COIL, POS. 56 42 28 14

COIL, NEG. 55 41 27 13

NORMALLY CLOSED 47, 48, 53, 54 33, 34, 39, 40 19, 20, 25, 26 5, 6, 11, 12

NORMALLY OPEN 43, 44, 49, 50 29, 30, 35, 36 15, 16, 21, 22 1, 2, 7, 8

4.7 DUAL 9-WAY ACTIVE DATA BRIDGE MODULE

The Dual 9 Way Active Data Bridge Module mounts in a slot (A4, A7, A10) in the “19 X 7” Equipment Shelf. Up to three (3) each Dual 9 Way Active Data Bridge Modules may be installed in one “19 x 7” Equipment Shelf. The Dual 9 Way Active Data Bridge Module must provide 4 wire transmission interconnection between a dedicated common port and eight multiple ports. The Dual 9 Way Active Data Bridge Module must incorporate a splitter channel and a combiner channel. Multiple inputs are connected to a common combiner channel output, and in the splitter channel, a common input is connected to multiple outputs.

Splitter and combiner channels are separate and independent, allowing for operation in full duplex data transmission mode. The Dual 9 Way Active Data Bridge Module must mate with a 56 pin connector on the Backplane.

4.7.1 Mechanical Characteristics

Weight: 16 oz max

4.7.2 Electrical Characteristics

Input Power: -24 to –56 Vdc, 60mA, maximum Splitter and Combiner Channel Loss/Gain: -30 to +10 dB usable range (switch selectable) Maximum Output Level (Overload Point): Combiner +12 dBm, Splitter + 5dBm Level Change with Loading: 1 dB maximum, one port to all ports loaded Input and Output Port Impedance: Splitter (multiple ports) and combiner (common port):

600 ohms balanced Harmonic Distortion: Splitter: less than 1% at +3 dBm Combiner: less than 1% at +8 dBm Noise: 20 dBmC, maximum Frequency Response: 300 to 3000Hz +/-1 dB referenced to 1000 Hz Delay Distortion: Less than 75 μs, 400 to 3000 Hz

COMMON 45, 46, 51, 52 31, 32, 37, 38 17, 18, 23, 24 3, 4, 9, 10

Cross-Port Coupling Loss (Crosstalk): Greater than 55 dB

4.7.3 Interface

Input voltage: -V Pin 35, GND Pin 17 Combiner Common Output: T Pin 41, R Pin 47, SX Pins 43 or 45 Splitter Common Input: T Pin 7, R Pin 13, SX Pins 9 or 11

COMBINER/SPLITTER PORT PIN NUMBER ASSIGMENTS

PORT1 PORT2 PORT3 PORT4 PORT5 PORT6 PORT7 PORT8

T 31/21 37/19 39/15 49/5 56/2 54/4 52/6 50/8

R 29/25 55/23 53/1 51/3 42/16 44/14 46/12 48/10

4.8 FUSE MODULE

The Fuse Module mounts in slot A3 on the “19 x 7” Equipment Shelf in the first slot to the right of the Power Supply Module and provides fusing for the modules in the other positions on the same Equipment Shelf. It must also include an alarm lamp and an alarm relay for both local and remote indication of a blown fuse. The Fuse Module must mate with a 56 pin connector on the Backplane.

Fuses are located on the front panel of the Fuse Module and are replaceable without taking the Fuse Module out of service. There must be two groups of fuses numbered 1 to 6 and 7 to 13, respectively. Each group may be connectable to a separate power source. The front panel must be equipped with an LED to provide visual indication of a blown fuse. A normally energized alarm relay must provide two sets of isolated relay contacts for use with an external alarm enunciator. Each set of relay contacts must provide both normally open and normally closed contacts.

4.8.1 Mechanical Characteristics

Weight: 8 oz max

4.8.2 Electrical Characteristics

Fuse Type: Buss GMT, 0.50 ampere, unless otherwise specified Alarm Input Voltage Range: -24 to –72 Vdc, filtered, positive-ground referenced Input current: 10 A maximum per circuit (two circuits)

4.8.3 Interface

- BATT Fuses 1 to 6 Pin 35

- BATT Fuses 7 t0 13 Pin 32 GND Pin 17 Alarm Relay K1: Normally Open Pin 6, Common Pin 10, Normally Closed Pin2 Alarm Relay K1: Normally Open Pin 12, Common Pin 4, Normally Closed Pin8 External Alarm Input: Pin 36

FUSE MODULE PIN NUMBER ASSIGNMENTS

4.9 POWER SUPPLY MODULE

The Power Supply Module mounts in slot A1 on the left side of the “19 x 7” Equipment Shelf and occupies 2 card slots. The Power Supply Module must provide filtered, regulated 24 Vdc output power at 4.0 amperes. It must operate from nominal 120 Vac commercial line voltage at 50 or 60 Hz and require a maximum of 2.5 amperes of input current.

The Power Supply Module must have a floating output that can be used to supply either negative or positive ground referenced DC voltage. The DC output must be capable of floating up to ± 150 volts away from ground.

The output voltage of the Power Supply Module must be provided on a 3-position screw terminal barrier strip on the rear of the module. Also located on the rear of the module must be an appliance cord for connection to the 120 Vac source. The front panel of the Power Supply Module must contain an LED indicator, lit when the Power Supply Module is powered on and operating properly.

4.9.1 Mechanical Characteristics

Weight: 2.8 pounds max

FUSED OUTPUT PIN FUSED OUTPUT PIN

1 55 7 25

2 51 8 21

3 47 9 13

4 43 10 9

5 39 11 5

6 29 12 1

Width: 2.88 inches Depth: 6.25 inches (including barrier strip)

4.9.2 Electrical Characteristics

Line input power: 102 to 132 Vac, 50 to 60 Hz, 2.5 A rms steady state, maximum Line conducted emissions: All inputs and outputs protected from lightning induced transients per FCC Part 68 Safety: UL 1459, CSA 22.2-234 DC Output: 24 ± 1.5 Vdc at 4.0 A DC output ripple and noise: Ripple: Less than 5 mV rms from DC to 50 kHz

Noise: Less than 27 dBmC Less than 50 mV peak-to-peak, including spikes to 20 MHz

No frequency component greater than 1 mV rms, 3000Hz to 5 MHz DC output line regulation: Less than100 mV with line varied from 102 to 132 Vac

4.10 JACKBOX UNIT

The Jackbox Unit must provide a receptacle jack for the controller’s headset/mic plug, a dual volume control for adjusting receive audio and sidetone level and an interface compatible with the facility voice recorder.

The Jackbox Unit must operate from –24 Vdc. It shall contain a regulator to convert the –24 Vdc to those voltages required for the electronics of the Jackbox Unit. It must provide a receptacle jack for the controller’s headset/mike plug, a concentric dual control knob, the inner ring for receive audio volume and the outer ring for sidetone volume adjustment. It must have an interface compatible with the facility voice recorder. The Jackbox Unit must accept a balanced audio input and terminate this input with a 600 ohm impedance. The Jackbox Unit must convert this balanced input into a single-ended audio signal for the headset.

The maximum headset output level must be limited to –13dBm. The Jackbox Unit shall produce a sidetone from its transmit audio path. The sidetone level must be adjustable over the range of –16 dB to – 38.5 dB below the transmit level. The transmit audio must be enabled by a Press-to-Talk switch that must close an electronic switch in the Jackbox Unit.

When this switch is closed the transmit audio must be capacitor coupled to the Jackbox Unit’s connector with a gain of 6.00 dB. This audio signal must be summed with the receive audio and output to the recorder pins of the Jackbox Unit’s connector at a nominal level of –10 dBm.

Selection of a radio frequency (RF) channel must be accomplished by inserting the controller’s headset/mike plug into the Jackbox Unit. While the channel is selected, the position must receive all receive audio occurring on that channel and its push-to-talk (PTT) and transmit functions shall be enabled. Transmission on a selected RF channel must be accomplished by pressing and holding the PTT switch for that position. A path for transmit audio must be established from the position to the corresponding radio interface for that frequency until the PTT switch is released. Channel deselecting must be accomplished by removing the controller’s headset/mike plug from the Jackbox Unit. The transmit side of the position Jackbox Unit is designated to be the 0 TLP. The receive side of any position Jackbox Unit is aligned for a -16 TL. The transmit radio interface is set for a 0 TL, and can be varied within limits of the interface module. The receive radio interface is set for a -16 TL, and can be varied within limits of the interface module. The facility voice recorder output is set for 0 TL. Mic input is set for -10dBm @ 50 ohm impedance.

4.10.1 Mechanical Characteristics

Electrical components and electronic assemblies must be housed in a sheet metal enclosure consisting of a chassis and cover formed from 0.062-inch thick aluminum alloy. Mounting tabs are to be located on the front face with a single opening in each tab to accept a #4 countersunk machine screw. The enclosure must be protected with an iridite solution and painted an international orange per FED-STD-595, Color No. 12197. The Jackbox Unit must have a DB15 male connector on its rear face. The Jackbox Unit’s weight and dimensions must be as follows:

Weight: 17 oz max Height: 1.62 inches Width: 4.0 inches (without mounting flanges) Depth: 7.66 inches

4.10.2 Electrical Characteristics

Input power: -24 Vdc, 0.10 A, maximum Received Audio: Balanced pair -600ohms Transmitted Audio: Balanced pair, 600 ohms Record Output: Balanced pair, -10 dBm, maximum Headset Audio: -13 dBm, maximum

4.10.3 Interface

Connections to the Jackbox Unit’s DB15 connector must be as follows:

PIN NO. SIGNAL NAME

1 TX AUDIO OUT(1)

2 RX INPUT (1)

3 PTT

4 GND

5 N/C

6 -24VDC

7 N/C

8 TO RCDR (1)

9 TX AUDIO OUT (2)

10 RX INPUT (2)

11 N/C

12 ENABLE

13 GND

14 N/C

15 TO RCDR (2)

4.11 CABLES

4.11.1 Jackbox Cable

The Jackbox Cable must be a shielded, multi-conductor, signal plenum cable with six (6) pairs of twisted conductors with Mylar/aluminum foil shield. The Jackbox Cable must meet Standard UL 13, Power Limited Circuit cable requirements.

4.11.2 Connectorized Jackbox Cable

The Connectorized Jackbox Cable must consist of the Jackbox Cable terminated with DB15 male and DB15 female, subminiature connectors with crimp contacts, hoods, strain relief clamps and jackscrews at opposite ends of the cable. The Connectorized Jackbox Cable must be marked per FAA-G-2100 paragraph 3.3.3.2

4.11.3 Radio Cable

The Radio Cable must be a shielded, multi-conductor, signal plenum cable with twelve (12) pairs of twisted 24 AWG conductors and 24 AWG ground wire with Mylar/aluminum foil shield.

The Radio Cable must meet UL Subject 13, Type Cl2P cable requirements. Radio Cable length must be 36” +/- 2” inch length. The Radio Cable must be terminated at one end with a DB25 male, subminiature connector with crimp contacts, hood, strain relief and jackscrews.

The Radio Cable must be marked per FAA-G-2100 paragraph 3.3.3.2.

4.12 66 TERMINAL PUNCH BLOCK

The 66 Terminal Punch Block must have a wall mounting bracket for mounting on the rear of the interior side of the Cabinet. It must have a 100 pair capacity, field terminatable type 66 punch block with terminal row spacing of 0.25 inches. Its dimensions must be 10 inches height long, 3.4 inches width and 1.2 inches deep. It must be provided with mounting tabs, open-ended stand-off brackets molded from flame retardant thermoplastic and package of 100 each, tin-plated copper, bridging clips attached (part number 66M1-50 and SA1-100).

4.13 66 TERMINAL PUNCH BLOCK WITH 25 PAIR CONNECTORS

The pre-wired 66 Terminal Punch Block with two 25 pair connectors must have a wall mounting bracket for mounting on the rear of the interior side of the Cabinet. It must have a 100 pair capacity, field terminated type 66 punch block with terminal row spacing of 0.25 inches. Its dimensions must be 10 inches height long, 3.4 inches width and 1.2 inches deep. It must be provided with mounting tabs, open-ended stand-off brackets molded from flame retardant thermoplastic and package of 100 each, tin-plated copper, bridging clips attached (part number S66M4-50W2 and SA1-100).

4.14 IDENTIFIER PANEL

The Identifier Panel must be a two-inch, single rack space strip that can be mounted just below each VSBP “19 x 7” Equipment Shelf to provide for placement of card labels.

4.15 POWER STRIP

A Power Strip (model number OB-15S) must be mountable on the interior side to the rear of the Equipment Rack to provide surge protected 120 Vac into the Uninterrupted Power Supply or Power Supply Module.

4.16 UPS SHELF

The Uninterrupted Power Supply Shelf is a rack mounted equipment shelf that supports the UPS. The UPS shelf must have a load rating of 150 lbs. The rack mounting hole pattern must be in accordance with ANSI/EIA 310, Standard RS-310-C-77, 1U, 2U and 3U.

4.17 DUPLEX OUTLET

The Duplex Outlet must be a standard 20 ampere 120 Vac duplex outlet and metal receptacle box with cover for mounting in the bottom of the Cabinet for the purpose of providing 120 Vac to the Uninterrupted Power Supply or Power Supply Module.

4.18 10 AMP POWER SUPPLY

The Power Supply provides filtered, regulated 24 Vdc output power at 10 amperes. It must operate from nominal 120 Vac commercial line voltage at 50 or 60 Hz. In a typical application, activation of the headset Push-To-Talk (PTT) switch provides relay contact closures from the Voice Switch Bypass to the external equipment. The Voice Switch Bypass can be configured to provide voltage keying for PTT. This is accomplished by the use of an external Power Supply set to the required voltage punched into the appropriate 66 Terminal Punch Block terminals and the reconfiguration of jumpers on the Voice Switch Bypass Backplane printed wiring board.

5.0 QUALITY ASSURANCE PROVISIONS

5.1 QUALITY REQUIREMENT

A quality control program, consistent with the requirements of FAA-STD-013d, Quality Control Program Requirements, must be maintained. The standard ANSI/ASQC Q-9003-1994 Quality Systems Model for Quality Assurance in Final Inspection and Test, must be complied with.

5.2 MECHANICAL DESIGN AND MANUFACTURE

The mechanical design and manufacture of the Voice Switch ByPass equipment/modules and component parts must comply with the following requirements of FAA-G-2100F:

Voice Switch ByPass Item

FAA-G-2100F

Compliance Paragraph

Printed Circuit Boards 3.2.2.1.3, 3.3.1.3.4.16

Assembly Requirements 3.2.2.1.4, 3.3.1.3.5.3

Reference Designations 3.2.2.4

Nameplates and Marking 3.3.3

Workmanship 3.3.4

Personnel Safety and Health 3.3.6

Documentation 3.4

Insulating Materials, Elect. 3.3.1.1.7

Excess Conductor Wire 3.3.1.2.5.2

Strain Relief 3.3.1.2.5.3

Equipment Finish 3.3.1.2.6

Wiring 3.3.1.3.4.26

6.0 TESTING REQUIREMENTS

6.1 RESERVED

6.2 PERFORMANCE TEST REQUIREMENTS

6.2.1 Data

The following data will be recorded for each test performed:

Description Data Serial Number Installation Site FAA Circuit Type or “Test” Jackbox Serial Number(s)

6.2.2 Frequency 1 Circuit Types

Tests will be performed to determine if the component parts passes or fails the stated criteria.

Only component parts that pass the criteria may be considered for shipment.

6.2.3 Frequency 2 Circuit Types

Description Minimum Measurement Maximum Pass/Fail (circle one)

Receive Input to Headset Output Test Headset output -18.0 dBm dBm -13.0 dBm P F

Description Minimum Measurement Maximum Pass/Fail (circle one) maximum power.

Headset output minimum power.

-43.0 dBm dBm -39.0 dBm P F

Receive Input to Recorder Output Test Recorder output maximum power.

-11.5 dBm dBm -8.5 dBm P F

Recorder output minimum power.

-36.5 dBm dBm -33.5 dBm P F

Microphone Input to Transmit Output Test Transmit output nominal power.

-1.5 dBm dBm 1.5 dBm P F

6.2.4 Backplane Channel 3 One Position to One or Two Frequencies

6.2.5 Frequency 2 Circuit Tests for FAA Circuit Type 2

Description Minimum Measurement Maximum Pass/Fail (circle one)

Receive Input to Headset Output Test Headset output maximum power.

-18.0 dBm dBm -13.0 dBm P F

Headset output minimum power.

-43.0 dBm dBm -39.0 dBm P F

Receive Input to Recorder Output Test Recorder output maximum power.

-11.5 dBm dBm -8.5 dBm P F

Recorder output minimum power.

-36.5 dBm dBm -33.5 dBm P F

Microphone Input to Transmit Output Test Transmit output nominal power.

-1.5 dBm dBm 1.5 dBm P F

6.2.6 Backplane Channel 3 Two Position to One Frequency

Description/

Requirements Minimum Measurement Maximum Pass/Fail

(circle one)

RX Gain Range Setup Headset output maximum power.

-16.0 dBm dBm -16.0 dBm P F

Receive Input to Headset Output Test Headset output maximum power.

-18.0 dBm dBm -13.0 dBm P F

Headset output minimum power.

-43.0 dBm dBm -39.0 dBm P F

Receive Input to Recorder Output Test Recorder output maximum power.

-11.5 dBm dBm -8.5 dBm P F

Recorder output minimum power.

-36.5 dBm dBm -33.5 dBm P F

Microphone Input to Transmit Output Test Transmit output nominal power.

-1.5 dBm dBm 1.5 dBm P F

Microphone Input to Recorder Output Test Recorder output power.

-11.5 dBm dBm -8.5 dBm P F