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**DEPARTMENT OF TRANSPORTATION**

FEDERAL AVIATION ADMINISTRATION

CHANNEL BANK

PURCHASE DESCRIPTION

Draft Release Version 03

8/21/2008

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FOREWORD

This Purchase Description is approved for use by all organizations of
the Federal Aviation Administration (FAA). It establishes requirements
for the acquisitions of telecommunication Channel Bank equipment for the
National Airspace System (NAS), and references Government and
non-Government standards, orders, handbooks, and other pertinent
documents.

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TABLE OF CONTENTS

[[1.]{.smallcaps} [SCOPE AND CLASSIFICATION
1]{.smallcaps}](#scope-and-classification)

[1.1. Scope 1](#scope)

[1.2. Abbreviations, Acronyms, Terms and Definitions
1](#abbreviations-acronyms-terms-and-definitions)

[1.2.1. Table of Abbreviations and Acronyms
1](#table-of-abbreviations-and-acronyms)

[1.2.2. Definitions 1](#definitions)

[2. APPLICABLE DOCUMENTS 4](#applicable-documents)

[2.1. General 4](#general)

[2.2. FAA Specifications and Standards
4](#faa-specifications-and-standards)

[2.3. Code of Federal Regulations 4](#code-of-federal-regulations)

[2.4. Applicable Electronics Standards
5](#applicable-electronics-standards)

[2.5. Telcordia Technologies Standards
5](#telcordia-technologies-standards)

[3. REQUIREMENTS 6](#__RefHeading___Toc202340625)

[3.1. General Requirements 6](#general-requirements)

[3.1.1. Environmental 6](#environmental)

[3.1.2. Electromagnetic Compatibility 6](#electromagnetic-compatibility)

[3.1.3. Input Power 6](#input-power)

[3.1.4. Fault Diagnosis 6](#fault-diagnosis)

[3.1.5. Automatic Protection Switching
7](#automatic-protection-switching)

[3.1.6. Mounting 8](#mounting)

[3.1.7. Depth 8](#depth)

[3.1.8. Configuration 8](#configuration)

[3.1.9. Reliability and Maintainability
8](#reliability-and-maintainability)

[3.2. Interfaces 9](#interfaces)

[3.2.1. Trunk Interface 9](#__RefHeading___Toc202340637)

[3.2.2. Service/Channel Interfaces 10](#servicechannel-interfaces)

[3.3. Remote Maintenance Monitoring System (RMMS)
12](#remote-maintenance-monitoring-system-rmms)

[3.3.1. RMMS Interface 12](#__RefHeading___Toc202340640)

[3.3.2. RMMS Functional Requirements 12](#rmms-functional-requirements)

[3.4. Workmanship, Materials and Finishes
12](#workmanship-materials-and-finishes)

[3.4.1. Workmanship 12](#workmanship)

[3.4.2. Materials and parts 13](#materials-and-parts)

[3.4.3. Finishes 13](#finishes)

[3.4.4. Marking 13](#marking)

[3.5. Personnel Safety 13](#personnel-safety)

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#  SCOPE AND CLASSIFICATION

## Scope 

> This Purchase Description contains the technical requirements of the
> Federal Aviation Administration (FAA) for a general purpose Channel
> Bank.

## Abbreviations, Acronyms, Terms and Definitions

> This section contains information of a general or explanatory nature
> that may be helpful, but is not mandatory.

### Table of Abbreviations and Acronyms

  ---------------------------- ------------------------------------------
  BIST                         Built In Self Test

  CGA                          Carrier Group Alarm

  DCE                          Data Circuit Terminating Equipment

  DDS                          Digital Data Service

  DSO                          Digital Signals at Rates of 64 kbps

  DSU/DP                       Data Service Unit Data Port

  DTE                          Data Terminal Equipment

  E&M                          Ear & Mouth Signaling

  FXO                          Foreign Exchange Office

  FXS                          Foreign Exchange Subscriber

  ISO                          International Organization for
                               Standardization

  MOT                          Mean Outage Time

  MTBO                         Mean Time Between Outages

  MTBF                         Mean Time Between Failure

  MTTR                         Mean Time To Repair

  OCU/DP                       Office Channel Unit Data Port

  POTS                         Plain Old Telephone Service

  RF                           Radio Frequency

  SPDT                         Single Pole Double Throw

  VDC                          Volts Direct Current
  ---------------------------- ------------------------------------------

### Definitions

#### 56/64xN 

> 56/64xN is a fractional T1/DS1 whose access channel(s) is a grouping
> of NxDS0 time slots (NX56/64 Kbps, where N = 1-23 DS0 Time slots per
> Fractional T1/DS1 Access Channel) that may be assigned in consecutive
> or non-consecutive order.

#### Availability 

> A statistical average that is the measurement of a system's uptime and
> determined by the following equation: Availability = MTBO/ (MTBO+MOT)

#### Basic Reliability Mean Time Between Failures (MTBF)

> The MTBF is based on a basic reliability model in which all components
> are in a series. It is used to provide information concerning
> corrective maintenance actions. It is not used to determine
> availability.

#### Channel Bank

> A Channel Bank is part of a carrier -multiplex terminal that changes
> analog voice and data signals into a digital format. The transmit
> portion of the Channel Bank allows the user to multiplex a group of
> signals into a higher bit-rate digital signal and the receiving end
> de-multiplexes these aggregates back into individual signals.

#### Digital Data Service (DDS)

> Digital Data Service (DDS) is a digital data Transmission system as
> defined by Telcordia PUB 62310. DDS supports data rates of 2.4, 4.8,
> 9.6, 19.2, and 64 Kbps.

#### Digital Signal 1 (DS1)

> As used herein, a
> [digital](http://www.its.bldrdoc.gov/fs-1037/dir-011/_1635.htm)
> [signaling](http://www.its.bldrdoc.gov/fs-1037/dir-033/_4874.htm) rate
> of 1.544 Mb/s, corresponding to the North American and Japanese T1
> designator that complies with ANSI T1.403.

#### Ear and Mouth (E&M)

> As used herein, E&M signaling is commonly referred to as "ear & mouth"
> or "recEive and transMit". E&M signaling defines a trunk circuit side
> and a signaling unit side for each connection similar to the Data
> Circuit Terminating Equipment (DCE) reference type. Use as 2-wire or
> 4-wire (unbalanced or balanced) for signaling and 2-wire or 4-wire for
> transmission

#### Failure

> Any condition of an LRU that the results do not meet all its operating
> conditions. A failure results in a maintenance action to replace the
> failed LRU. Depending upon the level of redundancy designed into the
> Channel Bank, a failure may or may not result in an outage.

#### Foreign Exchange Office (FXO)

> FXO is a telephone interface that receives Plain Old Telephone Service
> (POTS). It generates the on hook and off hook indicators used to
> signal loop closure at the voice switch end of the circuit.

#### Foreign Exchange Station (FXS)

> FXS is a telephone interface which provides battery power, sends dial
> tone, and generates ringing voltages.

#### Lowest Replaceable Unit (LRU)

> As used herein, an LRU is the lowest level subassembly that is to be
> replaced during site level maintenance activities.
>
> *Note:* An LRU is a separate, replaceable physical package that
> performs usually a single function or a group of closely related
> functions.

#### Mean Outage Time (MOT)

> A statistical mean time to restore a Channel Bank that is fully loaded
> with interface cards, to full operating condition. MOT is the sum of
> MTTR and mean logistics delays.

#### Mean Time Between Outages (MTBO)

> A statistical mean time between outages which is calculated on a
> statistical basis from the known failure rates of various components
> of the system at the highest operating temperature and worst case
> environmental conditions listed herein.

#### Mean Time To Repair (MTTR)

> A statistical mean time to restore the Channel Bank to full operating
> condition (meeting all the requirements listed herein). MTTR includes
> the time to detect a failure, isolate the failure, remove and replace
> the failed LRU, and verify the failure has been corrected. It does not
> include any logistics delays.

#### Outage

> A failure that results in the Channel Bank not meeting all the
> requirements listed herein.

#### Red Alarm

> An indication that is understood but not limited to a failure of any
> component, interface system or network element at the host terminal
> that would result in an outage.

#### Yellow Alarm

> The yellow alarm also sometimes known as a remote alarm indication
> (RAI) signal transmits in the outgoing direction when a terminal
> determines the incoming signal is lost. The yellow alarm returns to
> the transmitting terminal to indicate the receiving terminal has lost
> the signal.

# APPLICABLE DOCUMENTS

## General

> The following documents, of the issue specified below, form part of
> this Purchase Description to the extent specified herein. In the event
> of a conflict between the requirements of this Purchase Description
> and any document listed or referenced below, this specification takes
> precedence.

## FAA Specifications and Standards

> FAA-G-2100H Electronic Equipment, General Requirements
>
> (May 09, 2005)
>
> FAA-STD-019E Lightning and Surge Protection, Grounding, Bonding and
>
> (December 22, 2005) Shielding Requirements for Facilities and
> Electronic Equipment
>
> FAA-E-2911 National Airspace (NAS) System Level Specification National
>
> (March 26, 1998) Airspace System (NAS) Infrastructure Management
> System (NIMS) Managed Subsystems
>
> FAA Order 1000.36 FAA Writing Standards
>
> (March 31, 2003)
>
> A limited number of copies of this Purchase Description and other
> applicable FAA documents may be obtained from the Contracting Officer
> in the FAA office issuing the solicitation. Requests should fully
> identify the material desired (document identification number, title,
> date of issue, etc.) and should identify the solicitation or contract
> involved, or other use to be made of the material requested.

## Code of Federal Regulations 

> Title 29, Part 1910, of the Code of Federal Regulations, Safety and
> Health Act (OSH Act).
>
> Information on obtaining OSHA documents can be obtained from the
> Occupational Safety and Health Administration Offices 200 Constitution
> Avenue, NW, Washington, DC 20010.

##  Applicable Electronics Standards

> Alliance for Telecommunications Industry Solutions (ATIS), American
> National Standards Institute (ANSI), Electronic Industries Association
> (EIA), Institute of Electrical and Electronics Engineers (IEEE), and
> Telecommunications Industry Association (TIA) standards
>
> EIA/TIA-232F Interface Between Data Terminal Equipment and Data
> Circuit
>
> (September 30, 1997) Terminating Equipment Employing Serial Binary
> Data Interchange
>
> ANSI T1.403 DS1 Electrical specification
>
> \(1999\)
>
> ANSI/IEEE 802.3 Standard for Information Technology
>
> \(2000\)
>
> EIA-310 Cabinets, Racks, Panels, and Associated Equipment
>
> (August 24, 1992)
>
> ANSI/EIA/TIA-530 High Speed Interface Using 25 Pin Connector
>
> (March 1987)
>
> ANSI/EIA/TIA-530-A High Speed 25 Position Interface for Data Terminal
> Equipment
>
> (May 26, 1992) and Data Circuit-Terminating Equipment, Including
> Alternative 26-Position Connector
>
> EIA/TIA standards can be obtained from Electronic Industries
> Association, 2001 Eye Street NW, Washington, DC 20006.

## Telcordia Technologies Standards

> GR-499 Transport System Generic Requirements (TSGR): Common
>
> (December 1998) Requirements
>
> SR-2275 Telcordia Notes on the Network
>
> (October 2000)
>
> PUB 43801 Digital Channel Bank Requirements and Objectives
>
> (November 1982)
>
> PUB 62310 Digital Data Systems; Channel Inter face specifications
>
> \(1987\)

# REQUIREMENTS

This Purchase Description has been written to conform to FAA Order
1000.36. The Requirements section of the Channel Bank Purchase
Description is broken into five sections. These sections cover General
Requirements, Interfaces, Remote Maintenance Monitoring System,
Workmanship and Personnel Safety.

## General Requirements 

> The following subsection describes the General Requirements of the
> Channel Bank.

### Environmental

> The Channel Bank must meet the following environmental requirements of
> FAA-G-2100H:

(a) Section 3.2.1.1.3 Indoor Operating Environments

(b) Section 3.2.1.2 Non-Operating Conditions

### Electromagnetic Compatibility

> The Channel Bank must meet the requirements of FAA-G-2100H section
> 3.3.2 Electromagnetic Compatibility.

### Input Power

> The Channel Bank must satisfy all requirements herein with -48 VDC
> input power as specified in FAA-G-2100H, section 3.1.1.7 Input Power
> Conditions.

### Fault Diagnosis

(a) The Channel Bank must include Built In Self Test (BIST)
    functionality that supports local fault diagnostics to the Lowest
    Replaceable Unit (LRU).

(b) The Channel Bank must include BIST functionality that supports
    remote fault diagnostics to the LRU.

(c) Operational traffic on any interface specified herein must be
    unaffected by any failure of the BIST.

#### Alarming

(a) Alarms must be visible on the front panel of the Channel Bank.

(b) Alarms must be generated that indicate any failure detected by the
    BIST.

(c) Trunk Conditioning and Coordination must be in accordance with
    Telcordia PUB 43801 section 1.6.5.

(d) The Channel Bank must provide one pair of Form C contacts-SPDT for
    input and output of alarms.

##### Carrier Failure Alarm 

(a) The following Carrier Failure Alarm indicators, as identified in
    section 1.6.4 of Telcordia PUB 43801, must be visible from the front
    panel of the Channel Bank:

    1.  RED

    2.  YELLOW

(b) The Carrier Failure Alarms indicators must identify the alarm being
    indicated.

(c) A Yellow Carrier Failure Alarm condition must provide for the option
    of report suppression.

(d) Any Carrier Failure Alarm condition must be configurable for an
    on-hook condition of the E lead on all E&M interfaces for the
    duration of the alarm.

(e) Any Carrier Failure Alarm condition must be configurable for an off
    hook condition of the E lead on all E&M interfaces for the duration
    of the alarm.

### Automatic Protection Switching

(a) Automatic Protection Switching (APS) must be a configurable feature
    that can be enabled or disabled.

(b) If APS is enabled, any failure to the Primary Trunk Interface will
    result in automatic switching to an alternate or Secondary Trunk
    Interface as described herein.

(c) As the result of an automatic switching, the Channel Bank must
    regain timing and frame synchronization within a 50ms time period,
    IAW Bell Core GR-499

(d) Any switching event described above must cause a corresponding alarm
    condition.

(e) Restoration of services must be IAW Bell Core GR-499, section 5.2.5

### Mounting

> The Channel Bank must be:

(a) Mountable into an EIA 310 19-inch rack (EIA-310) using U.S Standard
    Units

(b) A maximum of 2 EIA-310 Rack Units (RU) in height, including
    ventilation requirements between units and any ancillary equipment
    that will be required to meet requirements stated herein

(c) Wall mountable

### Depth

> The Channel Bank must not exceed 18 inches in depth.

### Configuration 

(a) The Channel Bank must accommodate any mix of Section 3.2.2
    Service/Channel Interfaces up to the aggregate capacity of the Trunk
    rate.

(b) If the configuration of a Channel Bank is software controlled:

    1.  The configuration data must be preserved within the Channel Bank
        such that no single module failure will require the reentry of
        configuration data.

    2.  The Channel Bank must allow for the storage of configuration
        data to an external device that is not part of the Channel Bank,
        such as a hard drive on a laptop, for backup and restoral
        purposes.

    3.  The Channel Bank must restore all configuration data as
        appropriate upon the replacement of any failed module.

### Reliability and Maintainability 

> The equipment must satisfy the following reliability and
> maintainability for any configuration and any combination of LRUs.

(a) Mean Time Between Failure (MTBF) must be greater then or equal to
    13,900 Hours

(b) The MTTR must be less than or equal to 0.5 hours

(c) The Channel Bank must operate without any preventive maintenance.

(d) The equipment must be maintainable using standard commercially
    available equipment.

(e) The Channel Bank must have an equipment availability of greater than
    or equal to 0.999964. For this requirement, the logistics delays are
    1.0 hours for an outage and 6.0 hours for a failure that is not an
    outage.

## Interfaces

> The LRU supporting the interfaces within the Channel Bank must be
> hot-swappable with no service loss to other LRU's.

### Trunk Interface

(a) The Channel Bank must provide 1 or more T1/DS1 interface(s) for the
    following Trunk Interfaces:

    1.  Primary

    2.  Secondary

(b) The Primary and Secondary interfaces must support APS as specified
    in section 3.1.5.

(c) The Primary and Secondary interfaces must support independent
    operation and provisioning where multiple Channel Banks can be
    brought into a single Channel Bank

#### Internal Trunk Timing

> Internal timing clock accuracy must be in accordance ANSI T1-403.

#### Loop Trunk Timing

> Loop timing jitter tolerance must conform to Telcordia PUB 43801.

#### External Timing

(a) An interface port must be provided to input external timing for the
    Channel Bank to use as timing clock.

(b) The interface port must output the external timing to connect to
    other equipment.

#### Format and Line Coding

> The T1/DS1 interfaces must provide the following as defined by ANSI
> T1.403:

(a) Super Frame (SF) format

(b) Extended Super Frame (ESF) format

(c) Bi-polar with 8 zero substitution (B8ZS) line code

(d) Alternate Mark Inversion (AMI) line code

### Service/Channel Interfaces

> The following section describes the Service/Channel Interfaces that
> are to be used within the Channel Bank.

#### Voice Frequency Interfaces

> The Channel Bank must provide the following Voice Frequency interfaces
> as defined by Telcordia PUB 43801:

(a) E&M

(b) FXS

(c) FXO

##### Audio Impedance

> The Voice Frequency audio interfaces must have a nominal impedance of
> :

(a) FXO and FXS must provide either 600 or 900 ohm impedance

(b) E & M must provide 600 ohm impedance

##### Audio Transmission Level 

> The audio transmission level for the E&M interfaces listed below must
> be adjustable over a range of --17.5dBm to +8dBm.

(a) 2-Wire

(b) 4-Wire

##### Signaling Types

> The E&M interface must provide the following Signaling Types as
> defined by SR-2275:

(a) Type I

(b) Type II

(c) Type IV

(d) Type V

#### Digital Interfaces

> The Channel Bank must provide 56xN or 64xN channelization for the
> Digital Interfaces described herein.

##### ANSI/EIA/TIA-232-F

(a) The Channel Bank must provide ANSI/EIA/TIA-232-F compliant
    interfaces for all Interface Types.

(b) The ANSI/EIA/TIA-232-F Interface Type Z must be configurable to
    allow for any combination of signals to be enabled or disabled.

(c) The ANSI/EIA/TIA-232-F interface must use the 25 pin connector.

##### ANSI/EIA/TIA-530 and 530-A

(a) The Channel Bank must provide ANSI/EIA/TIA-530 compliant interfaces
    using the 25 pin connector.

(b) The Channel Bank must provide ANSI/EIA/TIA-530-A compliant
    interfaces using the 25 pin connector.

##### Digital Data Service (DDS)

> The Channel Bank must provide Digital Data Service (DDS) interfaces as
> defined by Telcordia PUB 62310.

###### Office Channel Unit Data Port (OCU/DP)

> The Channel Bank must provide Office Channel Unit Data Port (OCU/DP)
> interfaces used for DDS service as defined by Telcordia PUB 62310.

###### Data Service Unit Data Port (DSU/DP)

> The Channel Bank must provide Data Service Unit Data Port (DSU/DP) as
> defined by Telcordia PUB 62310.

## Remote Maintenance Monitoring System (RMMS) 

> The Channel Bank must support Simple Network Management Protocol
> (SNMP) for remote maintenance.

### RMMS Interface

> The Channel Bank's RMMS interface must be IEEE 802.3 10BaseT
> compliant.

### RMMS Functional Requirements

(a) The Channel Bank must provide, without interfering with operational
    traffic on any of the interfaces identified herein, the following
    data upon demand within two (2) seconds on average and no later than
    four (4) seconds, as specified in FAA-E-2911, section 3.2.3.c:

    1.  Fault status of the Channel Bank

    2.  Configuration of the Channel Bank

    3.  Operational status of the Channel Bank

(b) The Channel Bank must send uniquely identified faults detected by
    the BIST through the RMMS interface.

## Workmanship, Materials and Finishes 

### Workmanship

> After fabrication, parts and assembled equipment must be cleaned of
> smudges; loose, spattered, or excess solder; weld metal, metal chips
> and mold release agents; or any other foreign material which might
> detract from the intended operation, function, or appearance of the
> equipment.

#### Threaded parts or devices 

> All threaded parts or devices must be free of cross threading,
> mutilation, or detrimental or hazardous burrs, and be firmly secured.

#### Wiring 

> Wires and cables must be positioned or protected to avoid contact with
> rough or irregular surfaces or sharp edges, to avoid damage to
> conductors or adjacent parts.

#### Shielding 

(a) Shielding on wires and cables must be secured in a manner that will
    prevent it from contacting or shorting exposed current-carrying
    parts.

(b) The ends of the shielding or braid must be secured to prevent
    fraying.

### Materials and parts

(a) The specifications of all materials and parts must be de-rated to
    ensure that the equipment will operate as intended over the full
    range of environmental and power conditions.

(b) The Channel Bank must be either fabricated from fungus-inert
    materials or conformably coated to provide an effective fungus
    resistant barrier.

### Finishes 

> All metal surfaces on cabinetry, panels, and structural parts must be
> painted, plated, or anodized to provide protection from the
> environment.

### Marking 

> All marking must be by the silk screen or the engrave-and-fill method.

## Personnel Safety 

> Provisions for personnel safety must be as stated in FAA-G-2100,
> Personnel Safety and Health: The design and development of electronic
> equipment must provide fail-safe features for the safety of personnel
> during the installation, operation, maintenance, or repair, or
> interchanging of a complete equipment assembly or component parts
> thereof. Equipment design pertaining to personnel safety must be in
> compliance with the appropriate requirements of the Occupational
> Safety and Health Act (OSH Act) as identified in Title 29, Part 1910,
> of the Code of Federal Regulations. Grounding and bonding must be as
> stated in FAA-STD-019. Human engineering factors affecting safety must
> be considered when establishing general or detailed design criteria.
> Comprehensive operational or maintenance procedures are not acceptable
> substitutes for an inherently safe design.

#  {#section .unnumbered}