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Northern Telecom NT5K17 Description

United kingdom trunk cards
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Meridian 1
United Kingdom Trunk Cards
Description
Publication number: 553-3001-173
Document status: Standard
Document release: 1.1
Date: July 17 1993
© 1993 Northern Telecom
All rights reserved.
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
United Kingdom
UK Trunk cards description 553-3001-173

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Summary of Contents for Northern Telecom NT5K17

  • Page 1 United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom Meridian 1 United Kingdom Trunk Cards Description Publication number: 553-3001-173 Document status: Standard Document release: 1.1 Date: July 17 1993 © 1993 Northern Telecom All rights reserved. UK Trunk cards description 553-3001-173...

  • Page 2: Publication History

    Publication history July 17, 1993 Standard, release 1.1. March 1992 Standard, release 1.0 553-3001-173 UKTrunk cards description...

  • Page 3: Table Of Contents

    Contents About this document References NT5K17 — Direct Dialing Inward trunk card Functional description Common features Microprocessor Signalling and control Signalling interface Physical description Technical description Power requirements Environmental specifications PAD switching Direct Dialing Inward description NT5K18 — Exchange Line trunk card...
  • Page 4 Contents Ground start operation Loop start operation Features description Periodic Pulse Metering (PPM) NT5K19 — Analog Tie trunk card Functional description Trunk types supported Common features Trunk circuit features Signalling and control Microprocessor Signalling interface Physical description Technical description Power requirements Environmental specifications PAD switching Trunk types description...

  • Page 5: About This Document

    This document describes trunk cards that are available for use only in the United Kingdom. It outlines the functions and applications of the following cards: • NT5K17 Direct Dialling Inward Trunk card • NT5K18 Exchange Line Trunk card • NT5K19 Analog Tie Trunk card.
  • Page 6 About this document See the Meridian 1 Installation and Maintenance Guide (NTCK01) for the following information: • Installation procedures • Circuit card installation and testing • System upgrades procedures • General maintenance information • Fault clearing • Hardware replacement. See the Generic X11 Including Supplementary Features (NTCK09) for the following information: •...

  • Page 7: Nt5K17 - Direct Dialing Inward Trunk Card

    Equipment (IPE) module or NT8D11 Common Equipment/Peripheral Equipment (CE/PE) module. The NT5K17 DDI trunk card can be installed in any PE slot in an IPE or CE/PE module. Up to sixteen cards can be installed in each NT8D37 IPE module. The NT8D11 CE/PE module can hold up to ten DDI cards.

  • Page 8: Microprocessor

    Signalling and control The signalling and control portion of the NT5K17 DDI trunk card operates with the Central Processing Unit (CPU) to control card hardware. The card receives messages from the CPU over a signalling channel and returns status information to the CPU over the same channel.

  • Page 9: Physical Description

    De pth: Connections The NT5K17 DDI trunk card has eight units. Each trunk unit on the card connects to the backplane through an 80-pin connector. The backplane is cabled to the input/output (I/O) panel, and the I/O panel is cabled to the cross-connect terminal.

  • Page 10: Technical Description

    1-4 NT5K17 Direct Dialing Inward Trunk Card Technical description The technical details of the NT5K17 Direct Dialling Inward trunk card are outlined below. Power requirements Table 1-1 lists the power requirements for the NT5K17 DDI trunk card. Table 1-1 NT5K17 power requirements Environmental specifications Table 1-2 lists the environmental specifications for the NT5K17 DDI card.
  • Page 11 United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom NT5K17 Direct Dialing Inward Trunk Card 1-5 PAD i n - 2 d B - 1 d B UK Trunk cards description 553-3001-173...

  • Page 12: Direct Dialing Inward Description

    (COS = SHL) Direct Dialling Inward description Each unit on the NT5K17 DDI card is capable of operating as a DDI trunk. Table 1-3 presents a summary of NT5K17 DDI trunk card signalling states. For information on features and signalling arrangements, refer to Generic...
  • Page 13 United Kingdom United Kingdom United Kingdom NT5K17 Direct Dialing Inward Trunk Card 1-7 Far End Release The public exchange disconnects the call by sending a forward clear signal. The forward clear signal is a high impedance loop (8.5K ohms or greater) in the direction of the DDI unit.
  • Page 14 1-8 NT5K17 Direct Dialing Inward Trunk Card Table 1-3 Summary of NT5K17 DDI Trunk card signalling states Si gna l I dl e Sei z e Di al i ng Ans wer Publ i c Ex change di s connec ts f i r st...

  • Page 15: Nt5K18 - Exchange Line Trunk Card

    NT5K18 — Exchange Line trunk card Functional description The NT5K18 Exchange Line trunk card provides the interface between a trunk and either an NT8D37 Intelligent Peripheral Equipment module (IPE) or NT8D11 Common Equipment/Peripheral Equipment (CE/PE) module. The Exchange Line trunk card can be installed in any PE slot in an IPE or CE/PE Module.

  • Page 16: Common Features

    2-2 NT5K18 Exchange Line Trunk Card Common features The NT5K18 Exchange Line trunk card: • allows trunk type to be configured on a per unit basis • indicates self-test status during an automatic or manual self-test • provides card-identification for auto configuration, and for determining the serial number and firmware level of the card •...

  • Page 17: Signalling Interface

    Signalling interface Trunk signalling messages are three bytes in length. The messages are transmitted in channel zero of the DS-30X in A10 format. Configuration information for the NT5K18 Exchange Line Trunk Card is downloaded from the CPU automatically during power-up or manually by commands from maintenance programs.

  • Page 18: Technical Description

    2-4 NT5K18 Exchange Line Trunk Card Technical description The technical details of the NT5K18 Exchange Line trunk card are outlined below. Power requirements Table 2-1 provides the power requirements for the NT5K18 Exchange Line trunk card. Table 2-1 NT5K18 Power requirements Environmental specifications Table 2-2 lists the environmental specifications of the NT5K18 Exchange Line trunk card.

  • Page 19: Pad Switching

    PAD switching The transmission properties of each trunk are characterized by the class-of- service (COS) assigned in the trunk data block (LD 14). • PADs should be switched OUT when connecting to "long line" (0-8 dB) public exchange trunk interfaces. (COS = LOL) •...

  • Page 20: Loop Start Operation

    2-6 NT5K18 Exchange Line Trunk Card Call placed by Meridian 1 The Meridian 1 places a call by applying ground to the B wire and the Public Exchange acknowledges by applying ground to the A wire. The Meridian 1 then places the trunk unit into the on-line state (low impedance loop), and removes the ground from the B wire.
  • Page 21 United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom NT5K18 Exchange Line Trunk Card 2-7 sends digits in the form of Dual Tone Multifrequency (DTMF) tones or dial pulses. Call disconnect Calls can be disconnected by either Loop Disconnect Clear operation or by Loop Guarded release operation.

  • Page 22: Features Description

    2-8 NT5K18 Exchange Line Trunk Card Features description Periodic Pulse Metering (PPM) All trunk types on the NT5K18 circuit card support the Periodic Pulse Metering (PPM) feature, or Subscriber Pulse Metering (SPM), as it is sometimes called. Periodic Pulse metering allows the user of each telephone on a Meridian 1 to keep an accurate record of Public Switched Telephone Network (PSTN) and Direct Outward Dialing (DOD) calls for billing or administration.

  • Page 23: Nt5K19 - Analog Tie Trunk Card

    NT5K19 — Analog Tie trunk card Functional description The NT5K19 Analog Tie trunk card provides the interface between a trunk facility and either an NT8D37 Intelligent Peripheral Equipment module (IPE) or NT8D11 Common Equipment/Peripheral Equipment (CE/PE) module. The NT5K19 Analog Tie trunk card can be installed in any PE slot in an NT8D37 IPE module or NT8D11 CE/PE module.

  • Page 24: Common Features

    3-2 NT5K19 Analog Tie Trunk Card Note: Common features The NT5K19 Analog Tie trunk card: • converts transmission signals from analog-to-digital and from digital- to-analog • enables and disables individual ports or the entire card under software control • provides outpulsing on the card. Make break ratios are defined in software and down loaded during power up and by software commands.

  • Page 25: Signalling And Control

    • Music on Hold access • Emergency Recorder access. Signalling and control The signalling and control portion of the trunk card works with the Meridian 1 Central Processing Unit (CPU) to operate the card hardware. The card receives messages from the Meridian 1 CPU over a signalling channel in the DS30X loop and returns status information to the CPU over the same channel.
  • Page 26 United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom 3-4 NT5K19 Analog Tie Trunk Card De pth: 254 mm (10 in .) 553-3001-173 UK Trunk cards description...

  • Page 27: Technical Description

    Connections The NT5K19 Analog Tie trunk card has four units. Each unit on the card connects to the backplane through an 80-pin connector. The backplane is cabled to the input/output (I/O) panel, and the I/O panel is cabled to the cross-connect terminal.

  • Page 28: Environmental Specifications

    3-6 NT5K19 Analog Tie Trunk Card Environmental specifications Table 3-2 provides the environmental specifications for the NT5K19 Analog Tie trunk card. Table 3-2 NT5K19 Environmental specifications Par amet er Oper at i ng t emper at ur e Oper at i ng hum i di ty St or age t emper at ur e PAD switching Table 3-3 presents the digital-to-analog and analog-to-digital loss for the...

  • Page 29: Trunk Types Description

    The loss PADs for AC15 and 4-wire E&M trunks are selected by the class of service (COS) assigned to the trunk data block (LD 14). • PADs should be switched OUT when trunks are connected using on- premise wiring. (COS = NTC) •...
  • Page 30 3-8 NT5K19 Analog Tie Trunk Card Receive signals All received signals are in the form of Earth-On or Earth-Off applied to the E wire. Earth-On is the application of ground to the E wire through a resistance of 1500 ohms. Earth-Off is the application of ground to the E wire through a resistance of greater than 400K ohms.

  • Page 31: Ac15 Trunk Operation (2280 Hz Tie Trunk)

    Table 3-4 Summary of NT5K19 DC-5 signalling states Si gna l I dl e Sei z e Ho ld Di al i ng: Di gi t Pu ls e DT MF Ans wer Fa r End Rel eas e Ne ar End Rel eas e AC15 trunk operation (2280 Hz Tie trunk) The NT5K19 Analog Tie trunk card supports the United Kingdom AC15-A method of signalling, which is used between two PBX machines.
  • Page 32 3-10 NT5K19 Analog Tie Trunk Card Table 3-5 NT5K19 tone-on and tone-off signalling Si gna ll in g d ir ect io n Tr ans mi t Re cei v e Tone-on signals are received at two power levels, high and low, depending on the length of the tone.
  • Page 33 Dialing The outgoing PBX sends address digits in the form of 10 pps pulses of signalling tone (2280 Hz). Dual Tone Multifrequency (DTMF) transfer of address information can also be used. Answer When the called party answers, the incoming PBX applies an answer signal to the signalling path.
  • Page 34 3-12 NT5K19 Analog Tie Trunk Card Cl ea r Bac k 553-3001-173 UK Trunk cards description — To ne- on f or l onger than 300 ms...

  • Page 35: Recorded Announcement/Music Trunk Operation

    Recorded Announcement/Music trunk operation When used in the Recorded Announcement/Music mode, the trunk circuit is connected to a customer provided recorded announcement machine or a music source. The NT5K19 Analog Tie trunk card supports the following announcement machines: • Start mode announcement machines (for example, Code-A-Phone) •...
  • Page 36 3-14 NT5K19 Analog Tie Trunk Card Figure 3-1 Recorded announcement - start mode Control Pulse from RAN machine from Meridian-1 Continuous mode The requirements for continuous mode announcement machines are as follows: • an impedance of 4 ohms or less •...

  • Page 37: Paging Trunk Operation

    Figure 3-2 Recorded announcement - continuous mode Control Pulse from RAN machine Busy Signal from RAN machine Music source The music source should provide an impedance of 600 . The default signalling level should be -9dBm (in 600 ) adjustable to a level of 10 dBm.
  • Page 38 United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom Meridian 1 United Kingdom Trunk cards Description Copyright © 1993 Northern Telecom All rights reserved. Information subject to change without notice. Meridian 1 is a trademark of Northern Telecom. Release 1.1 Standard July 17, 1993...

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