2 Draft VCS SRD Tactical 4 Dec 23.docx

Tactical Voice Communication Switch System Requirements Document

For the Tactical Voice Communication Switch Document Number: [#] (Cage 98748) Version: 1 Version Date: 04 DEC 2023

Prepared By:

AFLCMC/HBAA

3508 D Ave., Bldg 201W, Room 74 Tinker AFB, OK 73145

Approved By: Approved By:

RECORD OF CHANGES

REVISIONS

Version: 1, 04 DEC 2023

DRAFT

Version: 1, 04 DEC 2023 Page 2 of 26

1. SCOPE

1.1. SYSTEM IDENTIFICATION. The USAF has a tactical voice switch installed in the AN/MSN-7 Communication Central, the USAF’s mobile air traffic control (ATC) tower. The MSN-7 voice switch is the ProComm 1540. The ProComm switch will be replaced with a tactical version of the VCS.

1.2. SYSTEM OVERVIEW. The ProComm 1540 is an analog voice switch that provides connectivity between an air traffic controller and the radios, telephone lines and other controllers. The ProComm is approaching 30 years old and the Original Equipment Manufacturer (OEM) has gone out of business, creating severe maintenance difficulties. In addition, as the USAF moves to Voice over Internet Protocol (VoIP) phone lines, the ProComm is unable to utilize these circuits. These difficulties have led to the decision to replace the ProComm with a digital system that is not Time Division Multiplexing based and that meets all ATC functionality.

1.3. DOCUMENT OVERVIEW. This System Requirements Document (SRD) provides performance requirements for procuring a replacement for the ProComm 1540.

1.4. REQUIREMENTS ORIGIN. Headquarters Air Force Flights Standards Agency (HQ AFFSA) provided two AF1067s, one titled Air Traffic Control Voice Control Switch/ ETVS Replacement dated 6 April 2023. This document is based upon those AF1067s, as well as on the ProComm (MSN-7 VCSS) specifications.

2. APPLICABLE DOCUMENTS

2.1. GENERAL. The applicable documents listed form a prerequisite to meet the requirements contained within this SRD. Documents marked with an asterisk (*) are specifically called out within subsequent specifications. Documents without asterisks (*) are not specifically called out but are still considered part of the base level requirement unless otherwise specified as “REFERENCE ONLY”.

2.2. GOVERNMENT DOCUMENTS. The following government documents form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract.

2.3. CURRENT SYSTEM TECHNICAL ORDERS. These documents are to be used to determine the current configuration, procedures or anything related to use of the current fielded systems.

Table 2.3

2.4. GENERAL TECHNICAL ORDERS

Table 2.4

Maintenance, and Test of Electrical Equipment 10/27/2021

The following general Technical Orders are REFERENCE documents:

2.5. INSTRUCTIONS AND MANUALS

Table 2.5

03/25/2022

10/17/2017

The following Instructions and Manuals are REFERENCE documents: You are to use the latest date as of the date of proposal

09/13/2022

02/05/2020 as amended 06/10/2022

4/18/94

AFMAN 13-204,

Vol 4

Public Law No: 113-283

SUBCHAPTER II--INFORMATION SECURITY

2.6. SPECIFICATIONS, STANDARD, ORDERS AND ADVISORY CIRCULARS

Table 2.6

The following Government Standard documents are MANDATORY and REQUIRE COMPLIANCE. The solution will be tested to or using the following Standards. You are to use the latest date as of the date of proposal.

Note: Particular attention to be given to Guidelines 1, 5, 9, 15 & 66

09/21/2021

MIL-STD-130N

Chg 1

05/18/2022

12/11/2015

12/24/2020

EPA Title III, EPA 550-B-021-001

TM-86-01R

The following Military Standard documents are REFERENCE documents

02/20/2014

2.7. INTERNATIONAL AGENCY DOCUMENTS

Table 2.7

*ICAO Annex 10 Vol 1Fifth Edition

2.8. NON-GOVERNMENT DOCUMENTS

Table 2.8

May 2012

The following practices are REFERENCE documents:

(Latest)

IEEE Std 1100- Recommended Practices for Powering and Grounding of Electronic Equipment

(Latest)

(Latest)

Feb 2016

2.9. SYSTEM REQUIREMENTS Contractor shall provide an organizational level Technical Order (TO) describing Operations & Maintenance procedures for the VCS in accordance with TO 00-5-1, para 3.5.2. Contractor shall provide an organizational level TO illustrating the VCS parts breakdown. Contractor shall provide a depot level TO describing detailed procedures in step-by-step form in accordance with TO 00-5-1, para 3.5.7. Contractor shall follow TO style and formatting requirements described in MIL-STD-38784.

2.10. SYSTEM FUNCTIONAL REQUIREMENTS System functional requirements are identified below within specific topics.

2.11. INTERFACE REQUIREMENTS

Table 2.11

IF-3

(KPP)

IF-4

(KPP)

Signaling

IF-5.1.1

20 Hz, Loop start

IF-5.1.2

20 Hz, Ground start

IF-5.1.3

20 Hz + Caller ID , Loop + DTMF

IF-5.1.4

20 Hz + Caller ID, Ground + DTMF

IF-5.1.5

20 Hz Voice

IF-5.1.6

Voice (DoD), 20 Hz Manual (DoD)

IF-5.1.7

VOX, Voice

IF-5.1.8

20 Hz (DoD), 20 Hz (DoD)

IF-5.1.9

20 Hz, Loop + DTMF

IF-5.1.10

20 Hz, Ground + DTMF

IF-5.2.1

VOX, Voice

IF-5.2.2

20 Hz, 20 Hz Manual

IF-5.2.3

20 Hz, Loop

IF-5.2.4

20 Hz + ID, Loop + DTMF

IF-5.3.1

Loop start, 20 Hz auto

IF-5.3.2

Loop, 20 Hz manual

IF-5.3.3

VOX, 20 Hz manual

IF-5.3.4

VOX, 20 Hz auto

IF-5.3.5

Loop, Start Voice

IF-5.3.6

Loop + DTMF, 20 Hz auto

IF-5.4.1

E-lead (Voice In), M-lead (Voice Out)

IF-5.4.2

Tone-on-idle, Tone-on-idle

IF-5.4.3

Tone-on-active, Tone-on-active

IF-5.4.4

Tone-on-idle + DTMF, Tone-on-idle + DTMF

IF-5.4.5

E-lead + DTMF, M-lead + DTMF

IF-5.4.6

Signaling compatible with legacy radios using PTT contact closure signaling on E&M pair or TX-pair center-tap keying

IF-5.5.1

2-digit SS dial, SS dial

IF-5.5.2

3-digit SS dial, SS dial

IF-5.5.3

2-digit SS dial, Voice

IF-5.5.4

3-digit SS dial, Voice

IF-5.5.5

VOX, SS dial

IF-5.5.6

2-digit SS dial, SS dial/voice

IF-5.5.7

3-digit SS dial, SS dial/voice

- Addendum 4, Override Call

- Addendum 5, Voice Call

- Addendum 6, Extended Call Forward: Covers FAA 's additional requirements for Call Forward

2.12. OPERATIONAL REQUIREMENTS

Table 2.12

OP-2.1

System shall reconfigure frequencies and voice channels to controller positions in less than 60 seconds.

OP-2.2

System reconfiguration shall result in a service interruption of less than 6 seconds.

OP-4.1.1

The VCS shall assign any combination of A/G frequencies; both transmitter and receiver, to any operator position as configured by authorized access levels.

OP-4.1.2

The VCS shall permit assignment of a single frequency multiple times at a single operator position each functioning as a distinct frequency as configured by authorized access levels.

OP-4.1.3

The VCS shall continuously display at least 13 alphanumeric character frequency designations for each frequency assigned to each operator position.

OP-4.1.4

The VCS shall provide single action latching selection / deselection for each frequency.

OP-4.1.5

The VCS shall provide transmitter connectivity for any combination of A/G frequencies selected at an operator position; minimum of 30 frequencies displayable.

OP-4.1.6

The VCS shall provide A/G receiver audio to the operator position for any combination of A/G frequencies selected at the operator position.

OP-4.1.7

The VCS shall preclude selection / deselection of transmitters and receivers at one operator position from affecting selection / deselection of transmitters and receivers at other positions.

OP-4.2.1

VCS A/G frequency values shall be displayed with values in MHz and decimal fractions thereof.

OP-4.2.2

VCS VHF A/G frequency values shall be displayed to the nearest 0.025 MHz (e.g., 125.550) with the extension for 8.33 kHz channel spacing displayed as * (e.g., 125.550*).

OP-4.2.3

VCS UHF A/G frequency values shall be displayed to the nearest 0.025MHz (e.g., 217.325).

OP-4.2.4

All VCS A/G frequency indications shall have a decimal point separating the integer and fractional portions of the frequency value.

OP-4.3.1

The VCS shall provide, by adaptation, continuous green visual indications of transmitter (TX) status at each operator position where a frequency has been selected. If more than one position has the same frequency selected, each should indicate green. Orange visual indications of transmitter (TX) selected tatus should appear for frequency status assigned to other positions with frequency unselected.

OP-4.3.2

The VCS shall provide continuous green visual indication of each TX selected but idle.

OP-4.3.3

The VCS shall provide flutter green visual indication of TX selected and keyed at each operator position activating PTT.

OP-4.3.4

The VCS shall provide flutter green visual indication of each TX selected and keyed at a second operator position activating PTT.

OP-4.3.5

The VCS shall provide flashing red visual indication of each TX not selected and keyed at a second operator position.

OP-4.4.1

The VCS shall provide continuous green visual indications of receiver (RX) status at each operator position where a frequency has been assigned.

OP-4.4.2

The VCS shall provide continuous green visual indication of each RX selected but idle.

OP-4.4.3

The VCS shall provide flashing green visual indication of each RX selected and audio being received as indicated by squelch break.

OP-4.4.4

The VCS shall provide fluttering green visual indication of each RX not selected and audio being received at a second operator position as indicated by squelch break.

OP-4.5.1.1

The VCS shall provide single action latching operator position controls to select either main or standby transmitter for each frequency.

OP-4.5.1.2

The VCS shall provide continuous visual indication at the operator position of the transmitter in use, either main or standby.

OP-4.5.1.3

The VCS shall preclude selection of a standby transmitter where no connection exists providing a simultaneous visual and audible indication of an invalid selection.

OP-4.5.2.1

The VCS shall provide single action latching operator position controls to select either main or standby receiver for each frequency.

OP-4.5.2.2

The VCS shall provide continuous visual indication at the operator position of the transmitter in use, either main or standby.

OP-4.5.2.3

The VCS shall preclude selection of a standby receiver where no connection exists providing a simultaneous visual and audible indication of an invalid selection.

OP-4.7.1

The VCS shall provide operator position controls to forward all frequencies assigned from one position to another, as configured by authorized access levels.

OP-4.7.2

The VCS shall provide a continuous visual indication at the operator position of frequency forwarding in use including identification of the forwarded-to position.

OP-4.10.1

The VCS shall provide every air traffic controller position that has A/G capabilities ability to transmit, receive and monitor to the UHF and VHF emergency frequencies 243.0 MHz and 121.500 MHz.

OP-4.10.2

The VCS shall uniquely mark single touch action button for emergency frequencies as “ERAD PTT’ on operational interactive displays.

OP-4.10.3

The VCS shall provide transmission on either UHF or VHF emergency frequency individually and/or both frequencies simultaneously via single, continuous, nonlatching touch action by the position operator.

OP-4.10.4

The VCS shall transmit selected emergency frequency (frequencies) over all other selected frequencies that are selected and have TX enabled, for the duration of the single, continuous, nonlatching operator touch action.

OP-4.10.5

The VCS shall provide a visual indication to every position operator with emergency frequency assignment to notify of the activation of an emergency UHF/VFH frequency transmitter.

OP-4.11.1

Activation of a transmitter for either 243.0 MHz and 121.500 MHz emergency frequency at an operational position shall lock out use of that transmitter at all other operational positions for the duration of the emergency transmission.

OP-4.11.2

The VCS shall provide the position operator at a locked-out position a visual and audible indication that the emergency frequency access has been locked out if PTT is attempted on the emergency frequency.

OP-5.1.1

The VCS shall provide operator position controls to place and receive G/G calls of all types per Interface Section IF-5.

OP-5.1.2

The VCS shall provide operator position controls to place and receive G/G calls in all modes per Interface Section IF-5.

OP-5.2.1

The VCS shall provide standard telephone keypad functionality for operator positions.

OP-5.2.2

The VCS shall automatically deactivate the keypad 15 seconds after entry of the last digit or activation of the keypad, whichever is later

OP-5.2.3

The VCS shall suspend automatic keypad deactivation for IP calls where additional dialing is required to complete the call.

OP-5.3.1.1

The VCS shall display continuous visual indications of incoming calls, including voice calls, at the operator position.

OP-5.3.1.2

The VCS shall display continuous visual indications of voice circuit(s) in use.

OP-5.3.1.3

The VCS shall display, on the currently selected operator screen display, visual indications of incoming calls to DA selectors assigned to operator screen pages that are not currently selected.

OP-5.3.2.1

The VCS shall provide audible chime indications at the operator position for incoming G/G calls, except voice calls and OVR calls.

OP-5.3.2.2

The VCS shall automatically discontinue chime indications when a G/G call has been answered.

OP-5.3.2.3

The VCS shall provide operator position controls to adjust the chime volume.

OP-5.3.2.4

The VCS shall provide a choice of distinctive chime sounds, as configured by authorized access levels.

OP-5.3.2.5

The VCS shall provide operator control to deactivate chime indications.

OP-5.3.2.6

The VCS shall provide a continuous visual indication of chime activation status.

OP-5.4.1

The VCS shall provide placement and reception of the Intercom (IC) at all operator positions as configured by authorized access levels.

OP-5.4.2

The VCS shall provide placement and reception of the Interphone (IP) at all operator positions as configured by authorized access levels.

OP-5.4.3

The VCS shall provide placement and reception of the Override (OVR) at all operator positions as configured by authorized access levels.

OP-5.5.1

The VCS shall provide placement and reception calls in Direct Access (DA) mode at all operator positions.

OP-5.5.2

The VCS shall provide placement and reception in Indirect Access (IA) mode at all operator positions.

OP-5.5.3

The VCS shall provide voice call signaling.

OP-5.6.1

The VCS shall connect OVR calls without action on the part of the called party.

OP-5.6.2

The VCS shall provide momentary audible indications of incoming OVR calls at operator positions as configured by authorized access levels.

OP-5.6.3

The VCS shall provide continuous visual indications of incoming OVR calls at operator positions.

OP-5.6.4

The VCS shall provide continuous visual indications of OVR calls in progress at operator positions.

OP-5.6.5

The VCS shall permit OVR calls to be placed in IA mode.

OP-5.6.6

The VCS shall permit OVR calls to be placed in DA mode.

OP-5.7.1

The VCS shall provide call transfer at operator positions.

OP-5.7.2

The VCS shall provide operator position controls to transfer incoming calls on a per call basis from one operator position to another.

OP-5.7.3

The VCS shall transfer calls using a three-step process wherein the operator manually selects the transfer feature, then places a call to a second position, and manually releases the call before completing the process.

OP-5.7.4

The VCS shall permit call transfer to include the transferring operator position on the transferred call or to release from the call without affecting the call transfer between the calling party and transferred-to-position.

OP-5.9.1.1

The VCS shall provide operator position controls to initiate, and participate in, conference calling.

OP-5.9.1.2

The VCS shall provide continuous visual indication at the operator position of participation in a conference.

OP-5.9.1.3

The VCS shall provide operator position controls to place a conference on hold.

OP-5.9.1.4

The VCS shall provide a continuous visual indication at the operator position of conference on hold.

OP-5.9.1.5

The VCS shall automatically release a conference call in progress upon release by the last party to a conference.

OP-5.9.2.1

The VCS shall provide operator position controls to initiate preset conferences using single action selectors, as configured by authorized access levels at operator positions.

OP-5.9.2.2

The VCS shall provide controls for authorized access levels to define preset lists of callers for preset conferences of at least 50 participants.

OP-5.14.1.1

The VCS shall direct incoming G/G calls to each operator position that do not have a corresponding DA selector assigned to a common answer call queue.

OP-5.14.1.2

The VCS shall queue calls to a depth of four calls including the call in-progress and calls on-hold.

OP-5.14.1.3

The VCS shall provide operator position controls to selectively answer calls from the call queue.

OP-5.14.2.1

The VCS shall display the idle state of the CA call queue at each position.

OP-5.14.2.2

The VCS shall display the incoming / ringing state of the CA call queue at each position.

OP-5.14.2.3

The VCS shall display the active state of the CA call queue at each position.

OP-5.14.2.4

The VCS shall display the hold state of the CA call queue at each position.

OP-5.15.1

The VCS shall release G/G calls in progress at an operator position, except OVR calls, through deselection of the assigned DA selector at the operator position.

OP-5.15.2

The VCS shall release G/G calls in progress at an operator position answered from the CA queue through deselection of the CA selector.

OP-5.15.3

The VCS shall provide operator controls that release G/G calls in progress, except OVR calls, using a single action non-latching selector.

OP-5.15.4

The VCS shall release G/G calls in progress at an operator position, except OVR calls, by placement of another G/G call.

OP-5.15.5

The VCS shall release G/G calls in progress at an operator position, except OVR calls, by resuming a call previously placed on hold.

OP-5.15.6

The VCS shall release OVR calls from the receiving operator position upon entry of an assigned IA code.

OP-5.15.7

The VCS shall automatically release incoming IP calls on voice circuits that do not have supervisory signaling within a configurable time limit configurable by authorized access levels.

OP-5.16.1

The VCS shall provide single action, non-latching, operator position controls to place the G/G call in progress on hold.

OP-5.16.2

The VCS shall provide a continuous visual indication at the operator position of all calls on hold.

OP-5.16.3

The VCS shall permit the placement of other A/G and G/G calls while calls are on hold at an operator position.

OP-5.17.1

The VCS shall provide continuous connectivity between operator positions and external stations using a single button control to activate a primary crash alarm.

OP-5.17.2

The VCS SBCA shall support at a minimum of six single phone agencies.

OP-5.17.3

The VCS SBCA shall be activated by pressing the SBCA button twice to avoid unintentional activation.

OP-5.17.4

The VCS SBCA shall provide simultaneous ring out to all parties connected and preconfigured at the distant end once SBCA has been activated by the Controller position.

OP-5.17.5

The VCS shall provide green visual indicators for each preconfigured connection (e.g., Fire Dept, AMOPS, CP, etc.) associated with the distant end connection, and when activated, green indicators will activate in steady state until the distant end answers the call.

OP-5.17.6

The VCS shall provide a green flutter indication on the DA button associated with the distant end connection when the distant end answers the SBCA call.

OP-5.17.7

The VCS shall provide audible ring tone when SBCA is activated and unanswered phones will continue to ring until the distant end connection is picked up (off the hook) or the SBCA conference is terminated by the control position.

OP-5.17.8

The VCS shall provide an additional audible tone indicating when distant end users have picked up (off the hook) their conference line.

OP-5.17.9

The VCS shall allow after the first distant end answers the SBCA call or upon a third selection of the SBCA button, the ring back call progress tone to be removed, but the unanswered conference parties will continue to ring or chime at the distant end.

OP-5.17.10

The VCS shall allow the SBCA call originator to disconnect an agency from the conference by pressing the DA button that associates with distant end agency or the ‘REL’ key. Note that pressing the ‘REL’ key will terminate the call to all agencies. The SBCA green bar indicator on the DA button will disappear upon the call termination.

OP-5.17.11

The VCS shall provide the distant end agency the ability to disconnect itself from the conference by hanging the phone up.

OP-5.17.12

The VCS shall allow all parties to hear and communicate with each other when a SBCA conference is established.

OP-5.17.13

The VCS shall allow only control positions the ability to activate the SBCA.

OP-5.17.14

The VCS shall the control position responsible for activating the SBCA conference the ability to terminate the SBCA conference by pressing the ‘REL’ key display screen. All parties will be disconnected upon termination by originator and the indicators will return to the normal idle states.

OP-5.18.1

The VCS shall provide progressive connectivity between operator positions and external stations using a single button control to activate a Secondary Crash Network (SCN).

OP-5.18.2

The VCS (SCN) shall support up to 100 single phone agencies.

OP-5.18.3

The VCS SCN shall be activated by pressing the SCN button twice to avoid unintentional activation.

OP-5.18.4

The VCS SCN shall provide simultaneous ring out to all parties connected and preconfigured at the distant end once SCN has been activated by the Controller position.

OP-5.18.5

The VCS shall provide green visual indicators for each preconfigured connection (e.g., Fire Dept, AMOPS, CP, etc.) associated with the distant end connection, and when activated, green indicators will activate in steady state until the distant end answers the call.

OP-5.18.6

The VCS shall provide a green flutter indication on the DA button associated with the distant end connection when the distant end answers the SCN call.

OP-5.18.7

The VCS shall provide audible ring tone when SCN is activated and unanswered phones will continue to ring until the distant end connection is picked up (off the hook) or the SCN conference is terminated by the control position.

OP-5.18.8

The VCS shall provide an additional audible tone indicating when distant end users have picked up (off the hook) their conference line.

OP-5.18.9

The VCS shall allow after the first distant end answers the SCN call or upon a third selection of the SCN button, the ring back call progress tone to be removed, but the unanswered conference parties will continue to ring or chime at the distant end.

OP-5.18.10

The VCS shall allow the SCN call originator to disconnect an agency from the conference by pressing the DA button that associates with distant end agency or the ‘REL’ key. Note that pressing the ‘REL’ key will terminate the call to all agencies. The SCN green bar indicator on the DA button will disappear upon the call termination.

OP-5.18.11

The VCS shall provide the distant end agency the ability to disconnect itself from the conference by hanging the phone up.

OP-5.18.12

The VCS shall allow all parties to hear and communicate with each other when a SCN conference is established.

OP-5.18.13

The VCS shall allow only controller positions the ability to activate the SCN.

OP-5.18.14

The VCS shall ensure the control position responsible for activating the SCN conference the ability to terminate the SCN conference by pressing the ‘REL’ key display screen. All parties will be disconnected upon termination by originator and the indicators will return to the normal idle states.

OP-6.1.1

The VCS shall provide operator position controls to enable/disable a one-way audio connection between A/G communications at a position and any G/G calls in progress at the position, as configured by authorized access levels.

OP-6.1.2

The VCS shall provide audio from A/G calls to the audio connection when PTT is active and the coupling has been enabled.

OP-6.1.3

The VCS shall preclude audio from G/G calls in progress at the position from being transmitted over A/G frequencies.

OP-6.1.4

The VCS shall provide a continuous visual indication at the operator position indicating the selection of A/G – G/G coupling.

OP-6.2.1

The VCS shall establish an audio connection between the Operator and Monitor at each Headset (HS) interface at an operator position activating microphones at both interfaces.

OP-6.2.2

The VCS shall establish an audio connection between HS interfaces at an operator position where the position is configured for 4-jack operation.

OP-6.2.3

The VCS shall provide activation / deactivation of position relief briefing functionality through a single action latching selector.

OP-6.2.4

The VCS shall temporarily suspend the audio connection when an A/G or G/G is in progress.

OP-6.2.5

The VCS shall provide a continuous visual indication at the operator position of the selection of relief briefing functionality.

OP-6.2.6

The VCS shall provide position relief briefing audio to the facility legal recorder.

OP-7.1.1

The VCS shall provide operator position controls that route all incoming audio from A/G calls and G/G calls, including OVR, to the position loudspeaker regardless of Headset/Loudspeaker routing settings for individual frequencies as configured by authorized access levels.

OP-7.1.2

The VCS shall provide a continuous visual indication at the operator position of the state of the selection of Master Loudspeaker audio routing.

OP-7.2.1

The VCS shall route incoming A/G call audio to the position loudspeaker during G/G calls, except OVR calls, as a facility setting configured by authorized access levels.

OP-7.2.2

The VCS shall provide single action latching operator position controls to disable the facility setting for automatic routing of A/G calls as configured by authorized access levels.

OP-7.2.3

The VCS shall route incoming A/G audio to the operator position headset/handset when the facility A/G LS routing setting has been disabled at an operator position, a G/G call is in progress, and G/G audio routing to the headset/handset has been selected.

OP-7.2.4

The VCS shall provide a continuous visual indication at the operator position of the automatic A/G audio routing selection in effect.

OP-7.3.1

The VCS shall provide single action latching operator position controls that route incoming A/G audio to the operator position LS regardless of HS/LS routing settings for individual frequencies, as configured by authorized access levels.

OP-7.3.2

The VCS shall provide a continuous visual indication at the operator position of the A/G LS Routing setting in effect.

OP-7.6.1.1

The VCS shall provide single action latching operator position controls for local muting at the position of the audio of any receiver frequency(s) in use at the position.

OP-7.6.1.2

The VCS shall provide a continuous visual indication at the operator position of local muting selection.

OP-7.6.2.1

For interfaces that provide remote muting capability, the VCS shall provide remote muting for operator-selected frequencies as configured by authorized access levels.

OP-7.6.2.2

The VCS shall provide single action latching operator position controls to select/deselect remote mute for each A/G frequency assigned to the position.

OP-7.6.2.3

The VCS shall provide a continuous visual indication at the operator position of remote muting selection regardless of local muting status.

OP-7.7.1

The VCS shall provide position controls to route receiver audio to either the operator headset (HS) or the position loudspeaker(s) (LS) for each frequency assigned to an operator position.

OP-7.7.2

The VCS shall provide single action latching controls for per frequency audio routing.

OP-7.7.3

The VCS shall provide a continuous visual indication of audio routing selection for each frequency assigned to an operator position.

OP-7.7.4

The VCS shall provide audio output at the operator position configurable to present audio from both A/G and G/G through a single loudspeaker.

OP-7.8.1

The VCS shall provide single action latching operator position controls for manual routing of G/G audio for individual voice circuits to either the operator handset or position loudspeaker, as configured by authorized access levels.

OP-7.8.2

The VCS shall route incoming audio for voice calls to the operator position LS for all operator positions on the circuit bearing the call.

OP-7.8.3

The VCS shall provide a continuous visual indication at the operator position of G/G audio routing selection in effect for individual voice circuits.

OP-7.9.1

The VCS shall provide single action latching operator position controls that route all incoming G/G audio to the operator position G/G LS regardless of HS/LS routing settings for individual voice circuits, as configured by authorized access levels.

OP-7.9.2

The VCS shall provide a continuous visual indication at the operator position of G/G audio routing selection in effect.

OP-7.12.1

The VCS shall provide single action latching operator position controls to route incoming OVR calls to either the operator headset or position loudspeaker, as configured by authorized access levels.

OP-7.12.2

The VCS shall provide a continuous visual indication at the operator position of G/G OVR audio routing selection.

OP-7.12.3

The VCS shall provide the following precedence for OVR G/G audio routing functions in descending order of precedence.

OP-7.13.1

The VCS shall provide unattended position routing to the operator position LS.

OP-7.13.2

The VCS shall provide Master LS Routing, if assigned.

OP-7.13.3

The VCS shall provide G/G LS Routing, if assigned.

OP-8.1.1.1

The VCS shall provide PTT transmission of A/G and G/G frequencies, except emergency.

OP-8.1.1.2

VCS shall upon PTT release simultaneously un-key selected A/G transmitters, disconnect the operator position from these transmitters, and resume all incoming G/G call audio.

OP-8.1.1.3

The VCS shall preclude transmission of G/G audio over A/G frequencies.

OP-8.1.1.4

The VCS shall provide PTT Option number one as the default setting.

OP-8.2.1

The VCS shall preclude more than one position from transmitting on a single frequency at a single time.

OP-8.2.2

The VCS shall provide simultaneous visual and audible indications of PTT lockout to second and subsequent positions attempting to transmit on a frequency as long as the lockout condition is active.

OP-8.2.3

The VCS shall terminate PTT lockout and indications when the frequency is available for use.

OP-8.2.4

The VCS shall provide simultaneous audible and visual indications of lockout per frequency to second and subsequent positions as long as the lockout condition is active.

OP-8.5.1

The VCS shall provide a push-to-talk option configurable by authorized access levels that permits transmission audio on G/G calls using PTT.

OP-8.5.2

The VCS shall provide audio from a headset interface activating PTT to the G/G call subject to local or 4-jack preemption, except incoming OVR calls.

OP-9.1.1

The VCS shall provide operator position controls that allow any single operator position to monitor audio directed to, and emanating from, at least three other positions, as configured by authorized access levels.

OP-9.1.2

The VCS shall preclude indications of monitoring in progress at monitored positions.

OP-9.1.3

The VCS shall provide a continuous visual indication at the monitoring position of position monitoring selection.

OP-9.1.4

The VCS shall provide a continuous visual indication at the monitoring position of which position(s) are being monitored.

OP-9.1.5

The VCS shall preclude loop closure of position monitoring between monitoring and monitored positions.

OP-9.1.6

The VCS shall automatically suspend voice monitoring in the presence of incoming A/G and G/G calls.

OP-9.2.1

The VCS shall provide operator position controls to permit division of the communications assigned to a position between A/G and G/G on a non-interfering basis, as configured by authorized access levels.

OP-9.2.2

The VCS shall automatically disable the automatic audio routing operator controls at a position when split operation is selected at the position.

OP-9.2.3

The VCS shall apply the master loudspeaker transfer to the G/G side of the split position.

OP-9.2.4

The VCS shall provide a continuous visual indication at the operator position of the selection of split operation.

OP-9.3.1.1

The VCS shall permit the use of two PJ-7 compatible HS interfaces at selected operator positions wherein each HS interface each provides for Operator and Monitor pair.

OP-9.3.1.2

The VCS shall prove up to two HS interfaces for each operator position, if ordered.

OP- 9.3.1.3

The VCS shall provide HS interface devices capable of connecting two HS peripherals, designated as “Operator” and “Monitor”, simultaneously.

OP-9.3.2.1

The VCS shall provide a hand microphone interface for selected operator positions.

OP-9.3.2.2

The VCS shall provide a connection for a hand microphone.

OP-9.3.2.3

The VCS shall provide hand microphones that provide PTT signaling.

OP-9.3.2.4

The VCS shall provide hand microphone volume control.

OP-9.3.3.1

The VCS shall provide a footswitch interface capable of providing PTT signaling, as ordered, for selected operator positions.

OP-9.3.3.2

The VCS shall provide a connection for a footswitch.

OP-9.3.3.3

The VCS shall provide a footswitch, as ordered.

OP-9.3.3.4

The VCS shall, at operator positions configured for 4-jack operation, accept footswitch PTT signaling from the first operator/monitor pair only.

OP-9.4.1.1

The first Monitor PTT shall preempt the first Operator and the second pair. (Highest priority)

OP-9.4.1.2

The first Operator shall preempt the second pair.

OP-9.4.1.3

The second Monitor shall preempt the second operator.

OP-9.4.1.4

The second Monitor shall be precluded from preempting the first pair.

OP-9.4.1.5

The second Operator shall have the lowest priority.

OP-9.4.1.6

The VCS shall provide the preempting monitor transmit audio to all lower priority HS interfaces.

OP-9.8.1

The VCS shall provide supervisory position controls with access to configure any combination of operator positions to perform any A/G function, as configured by authorized access levels.

OP-9.8.2

The VCS shall permit supervision of subsets of operator positions from supervisory positions as configured by authorized access levels.

2.13. TOWER/RADAR COORDINATION Tower/radar coordination is not required.

2.14. CAPACITY REQUIREMENTS VCS shall meet the following capacity requirements:

Table 2.14

2.15. ENVIRONMENTAL, SAFETY and OPERATIONAL HEALTH REQUIREMENTS

Table 2.15

2.16. CYBERSECURITY REQUIREMENTS

Table 2.16

CYB-1

(KPP)