Document Outline

• toc
  • New in this release
    • Other
      • Revision History
  • How to get help
    • Getting help from the Nortel web site
    • Getting help over the telephone from a Nortel Solutions Center
    • Getting help from a specialist by using an Express Routing Code
    • Getting help through a Nortel distributor or reseller
  • Overview
    • Contents
    • Line cards
      • NT1R20 Off-Premise Station Analog Line card
        • NT5D11 and NT5D14 Lineside T1 interface card
        • NT5D33 and NT5D34 Lineside E1 Interface card
        • NT8D02 Digital Line card
        • NT8D09 analog message waiting line card
      • Installation
      • Operation
        • Host interface bus
        • Intelligent Peripheral Equipment
          • DS-30X loops The line interfaces provided by the line cards conn
          • Card LAN link Maintenance communication is the exchange of contr
      • Analog line interface units
        • Coder/Decoder circuit
        • Variable gain filters
        • Balancing network
        • Line interface and foreign voltage protection
      • Digital line interface units
        • TCM loop interfaces
        • Signaling
      • Analog line call operation
        • Incoming calls
        • Outgoing calls
        • Message waiting
        • Analog line supervision
          • Battery reversal answer and disconnect supervision Battery rever
          • Hook Flash disconnect supervision Hook flash disconnect supervis
      • Digital line call operation
      • Lineside T1 and E1 call operation
        • Loop Start Mode
          • Incoming calls Incoming calls to terminal equipment attached to
          • Outgoing calls During outgoing calls from the terminal equipment
          • Call disconnect from far end PSTN, private network or local Stat
          • Call disconnect from Lineside T1 terminal equipment Alternativel
        • Ground Start Mode
          • Incoming Calls Incoming calls to terminal equipment that is conn
          • Outgoing Calls During outgoing calls from the terminal equipment
          • Call disconnect from far end PSTN, private network or local stat
          • Call disconnect from Lineside T1 terminal equipment Alternativel
        • Ground Start Restrictions
          • Distant end disconnect restrictions If the SAL feature is not av
          • Glare restrictions In telephone lines or trunks, glare occurs wh
      • Voice frequency audio level
      • Off-premise line protection
      • Line protectors
      • Line protection grounding
      • Line and telephone components
        • Telephones
        • Line cards
    • Trunk cards
      • NT8D14 Universal Trunk card
        • NT8D15 E and M Trunk card
        • NTCK16 Generic Central Office Trunk card
    • Installation
    • Procedure 1
    • Operation
      • Host interface bus
        • Intelligent Peripheral Equipment
          • DS-30X loops The interfaces provided by the line and trunk cards
          • Card LAN link Maintenance communication is the exchange of contr
      • Trunk interface unit
        • Coder/Decoder circuit The coder/decoder (codec) performs Analog
          • Variable gain filters Audio signals received from the analog pho
          • Balancing network Depending on the card type, the balancing netw
          • Signaling circuits Signaling circuits are relays that place outg
          • Control signals Control signals and logic are provided when the
    • Serial Data Interface (SDI) cards
      • Uses
      • Features
      • Specifications
        • Power consumption
        • Environmental
        • Electrostatic discharge
        • Electromagnetic interference
        • Reliability
      • Installation
        • Configuring the system software
      • Maintenance
  • Circuit card installation
    • Contents
    • Card slots - Large System
    • Circuit and installation
    • Precautions
    • Installing a circuit card
    • Procedure 2
  • Acceptance tests
    • Contents
    • Introduction
    • Conference cards
    • Procedure 3
    • Digitone receiver cards
    • Procedure 4
    • Line cards
    • Procedure 5
    • Multifrequency sender cards
    • Procedure 6
    • Multifrequency signaling cards
    • Procedure 7
    • Network cards
    • Procedure 8
    • Trunk cards
    • Procedure 9
    • Procedure 10
    • Tone and digit switch cards
    • Procedure 11
  • Option settings
    • Contents
    • Circuit card grid
    • NT1R20 Off-Premise Station card
    • NT5D12 Dual DTI/PRI (DDP) card
      • General purpose switches
      • Trunk interface switches
      • Ring ground switches
      • DCH mode and address select switches
      • Illustrations of switch locations and settings
    • NT6D42 Ringing Generator DC
    • NT6D80 Multi-purpose Serial Data Link card
    • NT8D14 Universal Trunk card
    • NT8D15 E and M Trunk card
    • NT8D17 Conference/TDS card
    • NT8D21 Ringing Generator AC
    • NT8D22 System Monitor
      • NT8D22 jumper settings
    • NT8D41BA Quad Serial Data Interface Paddle Board
      • Baud rate
        • Address
        • DTE/DCE mode
    • QPC43 Peripheral Signaling card
    • QPC414 Network card
    • QPC441 3-Port Extender cards
    • QPC841 4-Port Serial Data Interface card
  • NT1R20 Off-Premise Station Analog Line card
    • Contents
    • Introduction
    • Physical description
      • Self Test
    • Functional description
      • Card interfaces
        • Voice and signaling interfaces
        • Voice and signaling interfaces
        • Voice and signaling interfaces
        • Maintenance communication
        • Maintenance communications
        • Maintenance communication
        • Power interface
        • Line interface units
        • Card LAN interface
        • Signaling and control
      • Card control functions
        • Microcontroller -
        • Microcontroller
        • Card LAN interface
        • Software service changes
        • Port-to-port loss configuration
    • Electrical specifications
      • Circuit power
      • Analog line interface
      • Power requirements
      • Foreign and surge voltage protection
      • Ringer limitations
      • Environmental specifications
    • Operation
      • Incoming calls
      • Outgoing calls
    • Connector pin assignments
    • Configuring the OPS analog line card
      • Jumper strap settings
    • Application
      • Off-premise station application
      • Other applications
      • Transmission considerations
        • Port-to-port loss
        • Termination transmission characteristics
  • NT4N39AA CP Pentium IV Card
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • Memory
    • Front panel connector pin assignments
      • COM1 and COM2 ports
      • USB port
      • 10/100/1000 Mbps Ethernet ports
      • Front panel LED indicators
      • ITP connector (25 PIN, Debug Only)
      • Post 80 Debug LEDs (Optional)
  • NT5D11 and NT5D14 Lineside T1 Interface cards
    • Contents
    • Introduction
    • Physical description
      • Card connections
      • Faceplate
    • Functional description
      • Card interfaces
      • T1 interface circuit
      • Signaling and control
      • Card control functions
        • Microcontrollers
        • Microcontroller
        • Card LAN interface
        • Sanity timer
        • Man-Machine Interface
    • Electrical specifications
      • T1 channel specifications
      • T1 channel specifications
      • Power requirements
      • Foreign and surge voltage protections
      • Environmental specifications
    • Installation and configuration
      • Dip switch settings
        • MMI port speed selection
        • Line Supervisory Signaling protocol
        • Address of Lineside T1 card to the MMI
        • T1 framing
        • T1 coding
        • DSX-1 length
        • Line supervision on T1 failure
        • Daisy-chaining to MMI
        • MMI master or slave
        • MMI port speed selection
        • Line Supervisory Signaling protocol
        • Address of Lineside T1 card to the MMI
        • T1 framing
        • T1 Coding
        • DSX-1 length
        • Line supervision on T1 failure
        • Daisy-Chaining to MMI
        • MMI Master or Slave
      • Installation
        • Vintage levels cabling 24 ports For modules with vintage levels
          • Vintage levels cabling 16 ports For modules with vintage levels
      • Cabling the Lineside T1 card
        • Cabling from the I/O panel with the NT5D13AA Lineside T1 I/O cab
        • Cabling from the I/O panel at the Main Distribution Frame
        • Procedure 12
        • T1 connections
        • External alarm connections
        • MMI connections
        • Procedure 13
        • T1 connections
        • External alarm connections
        • MMI connections
      • Terminal configuration
      • Software configuration
        • Disconnect supervision
        • OSP <CR>
        • ISP <CR>
        • OSP <CR>
        • ISP <CR>
    • Clocking Requirement
      • Connecting MGC DECT Clock Reference Cable
        • Pre requisites
        • Connecting MGC DECT Clock Reference Cable
    • Man-Machine T1 maintenance interface software
      • Description
        • Alarms
        • T1 performance counters and reports
        • T1 verification and fault isolation testing
      • Login and password
      • L<CR>
      • L <address>
      • L 13 4 <CR>
      • L<CR>
      • L <address>
      • L 13 4 <CR>
      • Basic commands
      • Configuring parameters
        • Set Time
        • Set Date
        • Alarm parameters
        • Set Clearing
        • Display Configuration
        • Set Time
        • Set Date
        • Alarm parameters
        • Set Clearing
        • Display Configuration
      • Alarm operation and reporting
        • Alarm Disable
        • Alarm Enable
        • Clear Alarm
        • Display Alarms
        • Clear Alarm Log
        • Display Status
        • Alarm Disable
        • Alarm Enable
        • Clear Alarm
        • Display Alarms
        • Clear Alarm Log
        • Display Status
      • Performance counters and reporting
        • Display Performance
        • Display History
        • Clear Error
        • Display Performance
        • Display History
        • Clear Error
      • Testing
    • Applications
  • NT5D33 and NT5D34 Lineside E1 Interface cards
    • Contents
    • Introduction
    • Physical description
      • Card connections
      • Faceplate
    • Functional description
      • Overview
      • Card interfaces
      • E1 interface circuit
      • Signaling and control
      • Card control functions
        • Microcontrollers
        • Card LAN interface
        • Sanity Timer
        • Man-Machine Interface
      • ELEI additional functionality
    • Electrical specifications
      • E1 channel specifications
      • Power requirements
      • Foreign and surge voltage protections
      • Environmental specifications
    • Installation and Configuration
      • Dip switch settings
        • MMI port speed selection
        • Line Supervisory Signaling protocol
        • Address of LEI to the MMI
        • E1 framing
        • E1 Coding
        • Line supervision on E1 failure
        • Daisy-Chaining to MMI
        • MMI Master or Slave
    • Installation
      • Available and restricted card slots in the NT8D37 IPE module
        • Vintage levels cabling 30 ports: For modules with vintage levels
        • Vintage levels cabling 16 ports: For modules with vintage levels
      • Cabling the LEI card
        • Cabling from the I/O panel with the NT5D35AA or NT5D36AA linesid
        • E1 Connections
        • External Alarm Connections
        • MMI Connections
        • Procedure 14
      • Terminal configuration
      • Software Configuration
        • Disconnect supervision
    • Clocking Requirement
      • Connecting MGC DECT Clock Reference Cable
        • Pre requisites
        • Connecting MGC DECT Clock Reference Cable
    • Man-Machine E1 maintenance interface software
      • Description
        • Alarms
        • E1 Performance Counters and Reports
        • E1 Verification and Fault Isolation Testing
      • Login and Password
      • Basic commands
      • Configuring parameters
        • Set Time
        • Set Date
        • Set Alarm
        • Set Clearing
        • Set Simple
        • Set Mode
        • Display Configuration (D C)
      • Alarm operation and reporting
        • Alarm Disable
        • Alarm Enable
        • Clear Alarm
        • Display Alarms
        • Clear Alarm Log
        • Display Status
      • Performance counters and reporting
        • Display Performance
        • Display History
        • Clear Error
      • Testing
    • Applications
  • NT5D60/80/81 CLASS Modem card (XCMC)
    • Contents
    • Introduction
    • Physical description
    • Functional description
    • Electrical specifications
      • Data transmission specifications
      • Power requirements
      • Environmental specifications
    • Configuration
      • Software service changes
  • NT5D97 Dual-port DTI2 PRI2 card
    • Contents
    • Introduction
    • Physical description
      • External D-Channel Interface DCH or MSDL
      • NT5D97 faceplate
        • Enable/Disable Switch
        • ENET LEDs
        • Trunk Disable (DIS) LEDs
        • OOS LEDs
        • NEA LEDs
        • FEA LEDs
        • LBK LEDs
        • DCH LED
        • Unit 0 Clk Connectors
        • Unit 1 Clk Connectors
        • Connector J5 (TRK)
        • Connector J6 (DCH)
      • Port definitions
      • System capacity and performance
        • Physical capacity
        • D-Channel capacity
        • CPU capacity
        • Power requirements
      • Cable requirements
        • E1 carrier cables
          • NTCK45AA (A0407956) The NTCK45AA (8 ft.) is an 120W cable for sy
          • NT8D7217 (A0617192) The NT8D7217 (50 ft.) is an 120W cable for s
          • NTCK78AA (A0618294) The NTCK78AA (50 ft.) is an 120W cable for c
          • NTCK79AA (A0618296) The NTCK79AA (40 ft) is a 75W coaxial cable
        • Reference clock cables
        • MSDL/DCH cables
        • External DCH cable
        • External MSDL cable
      • Cable diagrams
    • Functional description
      • NT5D97 circuit card locations
      • NT5D97AA/AB DIP switch settings
      • Trunk interface switches for NT5D97AA/AB
        • Impedance level and unit mode
        • Transmission mode
        • Line build out
        • Receiver impedance
        • Ring ground switches for NT5D97AA/AB
      • DCH Address select switch for NTBK51AA daughterboard for NT5D97A
      • NT5D97AD DIP switch settings
        • Trunk interface switches for NT5D97AD
          • Trunk 0 switches Switch S12 gives the MPU information about its
          • Table 142
          • Ring ground switches for NT5D97AD Switch S16 selects which ring
      • DCH Address select switch for NTBK51AA daughterboard for NT5D97A
      • MSDL external card
    • Architecture
      • Clock operation
        • Tracking mode
        • Free run (non-tracking) mode
      • Reference clock errors
      • Automatic clock recovery
      • Automatic clock switching
      • Clock configurations
    • Operation
      • Procedure 15
      • If the DDCH is installed, the DDCH LED should flash three times.
      • The faceplate LEDs should go on for 4 seconds then go off and th
      • Procedure 16
      • Configuring the NT5D97
      • Testability and diagnostics
  • NT5K02 Flexible Analog Line card
    • Contents
    • Introduction
    • Applications
  • NT5K21 XMFC/MFE card
    • Contents
    • Introduction
    • MFC signaling
      • Signaling levels
      • Forward and backward signals
    • MFE signaling
    • Sender and receiver mode
      • Receive mode
        • Send mode
      • XMFC sender and receiver specifications
      • XMFE sender and receiver specifications
    • Physical specifications
  • NT6D70 SILC Line card
    • Contents
    • Introduction
      • ISDN BRI
    • Physical description
      • Power consumption
      • Foreign and surge voltage protections
    • Functional description
      • Micro Controller Unit (MCU)
      • IPE interface logic
      • S/T interface logic
  • NT6D71 UILC line card
    • Contents
    • Introduction
    • Physical description
      • Power consumption
    • Functional description
      • Micro Controller Unit (MCU)
      • IPE interface logic
      • U interface logic
  • NT6D80 MSDL card
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • CPU bus interface
      • Micro Processing Unit (MPU)
      • Memory
      • Serial interface
      • MSDL operations
      • Data flow
    • Engineering guidelines
      • Available network card slots
      • Card mix
      • Address decoding
      • Port specifications
      • Implementation guidelines
      • Environmental and power requirements
    • Installation
      • Device number
      • MSDL interfaces
      • Installing the MSDL card
      • Procedure 17
      • Cable requirements
      • Cable installation
        • PRI trunk connections
        • Procedure 18
        • I/O panel connections
        • Procedure 19
      • MSDL planning form
    • Maintenance
      • MSDL states
        • Manually disabled
        • Manually enabled
        • System disabled
      • Maintaining the MSDL
      • System controlled maintenance
      • Manually controlled maintenance
        • Enabling the MSDL
        • Disabling the MSDL
        • Resetting the MSDL
        • Displaying MSDL status
        • Self-testing the MSDL
      • Manually isolating and correcting faults
        • Newly installed MSDL cards
        • Previously operating MSDL cards
    • Replacing MSDL cards
    • Procedure 20
    • Symptoms and actions
    • Diagnosis: The MSDL card is disabled or faulty.
    • Diagnosis: Peripheral software download failed because of MSDL c
    • Diagnosis: The MSDL card has been system disabled because of an
    • Diagnosis: The MSDL card has been system disabled because of per
    • System disabled actions
  • NT8D02 and NTDK16 Digital Line cards
    • Contents
    • Introduction
      • NT8D02 Digital Line card
      • NTDK16 Digital Line card
    • Physical description
    • Functional description
      • NT8D02 Digital Line card
      • NTDK16 Digital Line card
      • Functional description of the NT8D02
      • Functional description of the NTDK16
      • Card interfaces
      • Digital line interfaces
        • TCM loop interface circuit
      • Card control functions
        • Microcontroller
        • Microcontroller
        • Card LAN interface
        • Sanity timer
      • Circuit power
    • Electrical specifications
    • Digital line interface specifications
    • Technical summary
      • Digital line interface specifications
      • Power requirements
      • Foreign and surge voltage protections
      • Environmental specifications
    • Connector pin assignments
    • Configuration
      • Jumper and switch settings
      • Software service changes
  • NT8D09 Analog Message Waiting Line card
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • Card interfaces
      • Line interface units
      • Card control functions
        • Microcontroller
        • Signaling and control
      • Card interfaces
      • Line interface units
      • Card control functions
        • Microcontroller
        • Signaling and control
      • Circuit power
    • Technical summary or
    • Electrical specifications
      • Analog line interface
        • Input impedance
        • Input impedance
        • Input impedance
        • Input impedance
        • Insertion loss
        • Insertion loss
        • Insertion loss
        • Frequency response
        • Frequency response
        • Frequency response
        • Message channel noise
        • Message channel noise
        • Message channel noise
        • Message channel noise
        • Frequency response
      • Power requirements
      • Foreign and surge voltage protections
      • Overload level
      • Overload level
      • Overload level
      • Overload level
      • Environmental specifications
    • Connector pin assignments
    • Configuration
      • Jumper and switch settings
      • Software service changes
    • Configuration
      • Jumper and switch settings
      • Software service changes
  • NT8D14 Universal Trunk card
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • Card interfaces
        • Trunk interface units
      • Card control functions
        • Microcontroller
        • Card LAN interface
        • Signaling and control
      • Signaling interface
    • Operation
      • Loop start operation
        • Incoming calls
        • Outgoing calls
          • Polarity-sensitive/-insensitive packs feature The CS 1000 softwa
      • Ground start operation
        • Incoming calls
          • Reverse-wiring compensation The CS 1000 software includes a feat
        • Outgoing calls
      • Direct inward dial operation
        • Incoming calls
      • Two-way, loop dial repeating, TIE trunk operation
        • Incoming calls
        • Outgoing calls
      • Senderized operation for DID and two-way loop DR trunks
        • Incoming calls
        • Outgoing calls
      • Outgoing automatic, incoming dial operation
        • Incoming calls
        • Outgoing calls
      • Recorded announcement trunk operation
        • Recorded announcement machines
        • RAN modes of operation
        • Multi-Channel RAN modes
          • Multi-Channel Level Start/Control Mode (minimum vintage BA) A RA
          • Continuous operation mode In the continuous operation mode (some
          • Start modes (minimum vintage BA) In a start mode (sometimes call
        • Call routing to RAN trunks
        • Programming RAN trunks
    • Electrical specifications
      • Power requirements
      • Foreign and surge voltage protection
      • Environmental specifications
      • Release control
      • PAD switching
    • Connector pin assignments
    • Configuration
      • Jumper strap settings
      • Service change entries
        • Port-to-port loss configuration
    • Applications
      • Paging trunk operation
      • Music operation
  • NT8D15 E and M Trunk card
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • Common features
      • Card interfaces
      • Trunk circuit features
        • Trunk unit functions
      • Card control functions
        • Microcontroller
        • Card LAN
      • Signaling interface
        • Signaling and control
      • Maintenance features
    • Operation
      • Signaling and call control
        • E and M Type I signaling
          • Idle state For E and M signaling, in the idle state the M lead i
          • Outgoing calls Outgoing calls are processed as follows:
          • Incoming calls The far-end initiates calls as follows:
        • E and M Type II signaling
        • Release control
        • Duplex signaling
    • Electrical specifications
      • Power requirements
      • Environmental specifications
      • Foreign and surge voltage protection
    • Connector pin assignments
    • Configuration
      • Jumper settings
      • Software service entries
        • Port-to-port loss configuration
    • Applications
      • PAD switching
      • Paging trunk operation
  • NT8D41BA Quad Serial Data Interface Paddle Board
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • System considerations
    • Connector pin assignments
    • Configuring the QSDI paddle board
      • Option switch settings
        • Baud rate
        • Address
        • DTE/DCE/Fiber mode
      • Software service changes
    • Applications
    • Physical description
    • Functional description
      • System considerations
    • Connector pin assignments
    • Configuring the QSDI paddle board
      • Option switch settings
        • Baud rate
        • Address
        • DTE/DCE/Fiber mode
      • Software service changes
    • Applications
  • NTAG26 XMFR card
    • Contents
    • Introduction
      • MF signaling
      • Signaling levels
      • XMFR receiver specifications
    • Physical specifications
    • Introduction
    • MF signaling
      • Signaling levels
      • XMFR receiver specifications
    • Physical specifications
  • NTAK02 SDI/DCH card
    • Contents
    • Introduction
    • NTAK02 SDI/DCH card
      • Connecting to the ports
      • Characteristics of the low speed port
      • Characteristics of the high speed port
    • Introduction
    • NTAK02 SDI/DCH card
      • Connecting to the ports
      • Characteristics of the low speed port
      • Characteristics of the high speed port
  • NTAK09 1.5 Mb DTI/PRI card
    • Contents
    • Introduction
    • Physical description
      • NTAK09 DTI/PRI power on self-test
      • NTAK20 power on self-test
      • NTAK93 self-test
      • DTI/PRI local self-test
        • Restrictions and limitations
      • Power requirements
      • Foreign and surge voltage protection
    • Functional description
    • Architecture
      • Signaling interface
      • Interconnection
      • Microprocessor
      • Digital pad
      • D-channel interface
      • DS-1 Carrier interface
        • Transmitter
        • Receiver
        • Connector pinout
      • Clock controller interface
      • Clock rate converter
  • NTAK10 2.0 Mb DTI card
    • Contents
    • Introduction
    • Physical description
      • Power requirements
      • Environment
    • Functional description
      • Applicability to France
    • Architecture
      • DS-30X interface
        • Transmit data
        • Receive data
        • DS-30X microprocessor
        • DS-30X microprocessor
      • Signaling interface
        • Interconnections
        • CEPT interface
        • Channel associated signaling
        • Incoming signal
        • Outgoing supervisory signals
        • Periodic Pulse Metering (PPM)
        • TS16 microprocessor
        • Change-of-state microprocessor
      • Carrier interface
        • Tx Direction
        • Rx Direction
      • Clock controller interface
        • Clocking modes
          • Tracking mode There are two stages to clock controller tracking:
          • Free-run (non-tracking) In free-run mode, the clock controller d
          • Tracking mode There are two stages to clock controller tracking:
          • Free-run (non-tracking) In free-run mode, the clock controller d
        • Clock controller functions and features
        • Reference switchover
        • Autorecovery and chatter
        • Reference clock selection through software
        • Reference clock interface
      • Switch settings
  • NTAK20 Clock Controller daughterboard
    • Contents
    • Introduction
      • Clocking modes
        • Tracking mode
        • Free-run (non-tracking)
    • Physical description
      • Faceplate LEDs
    • Functional description
      • Phase difference detector circuit
      • Digital phase lock loops
        • System clock specification and characteristics
        • EIA/CCITT compliance
        • Monitoring references
        • Reference switchover
        • Autorecovery and chatter
      • Digital to analog converter
        • Holdover and free-run
      • CPU-MUX bus interface
      • Signal conditioning
      • Sanity timer
      • Microprocessor
        • Reference Clock Selection
      • External timing interface
      • Hardware integrity and regulatory environment
  • NTAK79 2.0 Mb PRI card
    • Contents
    • Introduction
    • Physical description
      • NTAK79 switches
        • Switch SW1 - DCHI Configuration
        • Switch SW2 - Carrier Impedance Configuration
        • Switch SW3 - Clock Controller Configuration
        • Switch SW4 - Carrier Shield Grounding
        • Switch SW1 - DCHI Configuration
        • Switch SW2 - Carrier Impedance Configuration
        • Switch SW3 - Clock Controller Configuration
        • Switch SW4 - Carrier Shield Grounding
      • Power requirements
      • Environment
    • Functional description
    • Architecture
      • DS-30X interface
        • Digital PAD
      • Signaling interface
      • Carrier interface
        • Impedance matching
      • Carrier grounding
        • Receiver functions
        • Transmitter functions
        • Loopbacks
      • CEPT transceiver
      • Slip control
      • D-channel support interface
        • DCHI special applications connection
      • Card-LAN interface
      • Clock controller interface
        • Clocking modes
          • Tracking mode There are two stages to clock controller tracking:
          • Free-run (non-tracking) In free-run mode, the clock controller d
          • Tracking mode There are two stages to clock controller tracking:
          • Free-run (non-tracking) In free-run mode, the clock controller d
        • Clock controller functions and features
        • Reference switchover
        • Autorecovery and chatter
        • Holdover and free-run
        • Reference clock selection through software
  • NTAK93 D-channel Handler Interface daughterboard
    • Contents
    • Introduction
    • Physical description
      • Faceplate LEDs
        • NTAK09 1.5 Mb PRI and NTBK50 2.0 MB PRI cards
      • Power consumption
    • Functional description
      • Microprocessors
      • DMA controller
      • Random Access Memory (RAM)
      • Read Only Memory (ROM)
      • LAPD data link/asynchronous controller
      • Counter/timer controller
      • Software interface circuit
      • DPNSS/DCHI Port
      • D-Port - SDTI/PRI interface
  • NTBK22 MISP card
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • Micro Processing Unit (MPU)
      • High-Level Data Link Controller (HDLC)
      • CPU to MISP bus interface
      • MISP network bus interface
      • Power consumption
  • NTBK50 2.0 Mb PRI card
    • Contents
    • Introduction
    • Physical description
      • Power requirements
      • Environment
    • Functional description
    • Architecture
      • DS-30X interface
        • Digital PAD
      • Signaling interface
      • Carrier interface
        • Impedance matching (Switch SW2)
      • Carrier grounding
        • Carrier Shield grounding (Switch SW4)
        • Receiver functions
        • Transmitter functions
        • Loopbacks
      • CEPT transceiver
      • Slip control
      • D-channel support interface
        • DCHI Configuration for NTAK93 only (SW1)
      • Card-LAN interface
  • NTBK51 Downloadable D-channel Handler daughterboard
    • Contents
    • Introduction
    • Physical description
    • Functional description
      • Microprocessors
      • Main memory
      • Shared memory
      • EPROM memory
      • Flash EPROM memory
      • EEPROM memory
      • Serial communication controller
      • Sanity timer
      • Bus timer
    • Download operation
      • System initialization
      • Card enabling or application enabling
      • Card reset
      • Background audit
  • NTCK16 Generic Central Office Trunk cards
    • Contents
    • Introduction
    • Physical description
      • Switch settings
      • Self-test
    • Functional description
      • Common features
    • Operation
      • Loop start operation
        • Idle state
        • Call placed by Central Office
        • Call placed by CS 1000E, CS 1000M, and Meridian 1
        • Central Office disconnect
        • CS 1000E, CS 1000M, and Meridian 1disconnect
    • Electrical specifications
      • Power requirements
      • Environmental specifications
      • Pad switching
    • Connector pin assignments
      • Cross connections
    • Configuration
      • NTCK16AX Central Office trunk card
        • Route Data Block
        • Trunk Data Block
      • NTCK16BX Central Office trunk card
        • Route Data Block
        • Trunk Data Block
        • BTID values by country
    • Applications
      • Periodic Pulse Metering
        • Detection limits
      • Busy tone detect
        • Detection limits
      • Loss switching
        • Equivalencies
      • Trunk to Trunk connection
      • Call disconnect
  • NTDK20 Small System Controller card
    • Contents
    • Introduction
    • Memory
      • NTTK25 daughterboard
    • 100BaseT IP daughterboards
    • PC card interface
    • Security device
    • SDI ports
    • Conferencing
      • 10BaseT port
    • Media Gateway/Media Gateway Expansion card slot assignment
  • NTDW60 Media Gateway Controller Card
    • Contents
    • Introduction
    • Processor
    • Ethernet ports
      • External connections
      • Internal connections
    • Expansion daughterboards
    • Backplane interface
    • Serial data interface ports
      • TTY default settings
      • MGC serial port configuration change
    • Faceplate LED display
      • Faceplate LED display
  • NTDW61 and NTDW66 Common Processor Pentium Mobile Card
    • Contents
    • Introduction
    • Cabinet/chassis support
    • Media storage
      • Fixed media drive
      • Removable media drive
      • Hard disk drive
    • Memory
    • Ethernet interfaces
      • ELAN
      • HSP
      • TLAN
    • Serial data interface ports
      • TTY parameters
    • USB 2.0 port
    • Security device
    • Faceplate
    • Faceplate buttons
      • Reset
      • Init
    • DIP switch
    • LED indicators
      • Status LED
      • Active CPU LED
      • Ethernet LEDs
        • ELAN and TLAN LEDs
        • HSP LEDs
      • Removable and fixed media drive LEDs
  • NTDW62 and NTDW64 Media Gateway Controller Daughterboards
    • Contents
    • Introduction
    • Media Gateway Controller card
      • Daughterboard configurations
  • NTDW65 Voice Gateway Media Card
    • Contents
    • Introduction
    • Ethernet ports
      • External connections
      • Internal connections
    • Backplane interfaces
    • Serial data interface ports
      • TTY settings
    • Faceplate LED display
  • NTRB21 DTI/PRI/DCH TMDI card
    • Contents
    • Introduction
    • Physical description
      • Power requirements
      • Foreign and surge voltage protection
    • Functional description
    • Software description
    • Hardware description
      • NTRB21 TMDI card
    • Architecture
      • Signaling interface
      • Interconnection
      • Microprocessor
      • Digital pad
      • D-channel interface
      • OFF = D-channel
      • OFF = D-channel
      • OFF = D-channel
      • DS-1 Carrier interface
        • Transmitter
        • Receiver
        • Connector pinout
      • NTAK20 Clock Controller (CC) daughterboard
        • Clock rate converter
  • NTVQ01xx Media Card
    • Contents
    • Physical description
    • Hardware architecture
      • Faceplate connectors and indicators
        • Reset switch
        • Status LED
        • PC card slot
        • Ethernet activity LEDs
        • Maintenance hex display
        • RS-232 Asynchronous Maintenance Port
    • Functional description
  • QPC841 Quad Serial Data Interface card
    • Contents
    • Introduction
    • Physical description
    • Functional description
    • Connector pin assignments
    • Configuring the QSDI card
      • Address switch settings
        • Baud rate switch settings
        • DTE/DCE mode switch settings
        • Test switch setting
      • Software service changes
    • Applications
  • The TDS/DTR card
    • Contents
    • Introduction
    • Features
      • Tone transmitter
      • Tone detector
      • SDI function
      • Tones and cadences
  • Appendix LAPB Data Link Control protocol
    • Contents
    • Introduction
    • Operation
    • Frame structure
    • LAPB balanced class of procedure
      • Balanced configuration
        • Combined station
        • Asynchronous Balanced Mode
    • Commands and responses
    • Description of procedure