Northern Telecom NT5K17 Operating and installation instructions
© 1993 Northern Telecom
All rights reserved.
UK Trunk cards description 553-3001-173
Meridian 1
United Kingdom Trunk Cards
Description
Publication number: 553-3001-173
Document status: Standard
Document release: 1.1
Date: July 17 1993
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553-3001-173 UKTrunk cards description
Publication history
July 17, 1993 Standard, release 1.1.
March 1992 Standard, release 1.0
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UK Trunk cards description 553-3001-173
Contents
About this document v
References v
NT5K17 — Direct Dialing Inward trunk card 1-1
Functional description 1-1
Common features 1-1
Microprocessor 1-2
Signalling and control 1-2
Signalling interface 1-2
Physical description 1-3
Technical description 1-4
Power requirements 1-4
Environmental specifications 1-4
PAD switching 1-4
Direct Dialing Inward description 1-5
NT5K18 — Exchange Line trunk card 2-1
Functional description 2-1
Trunk types supported 2-1
Common features 2-2
Microprocessor 2-2
Signalling and control 2-2
Signalling interface 2-3
Physical description 2-3
Technical description 2-4
Power requirements 2-4
Environmental specifications 2-4
PAD switching 2-5
Trunk types description 2-5
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iv Contents
553-3001-173 UK Trunk cards description
Ground start operation 2-5
Loop start operation 2-6
Features description 2-8
Periodic Pulse Metering (PPM) 2-8
NT5K19 — Analog Tie trunk card 3-1
Functional description 3-1
Trunk types supported 3-1
Common features 3-2
Trunk circuit features 3-2
Signalling and control 3-3
Microprocessor 3-3
Signalling interface 3-3
Physical description 3-3
Technical description 3-4
Power requirements 3-4
Environmental specifications 3-5
PAD switching 3-5
Trunk types description 3-6
2-wire and 4-wire E&M Type 1 trunk operation (DC-5) 3-6
AC15 trunk operation (2280 Hz Tie trunk) 3-8
Recorded Announcement/Music trunk operation 3-11
Paging trunk operation 3-13
Emergency Recorder (RCD) operation 3-13
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v
UK Trunk cards description 553-3001-173
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.
The above circuit cards have software enhancements that comply with
United Kingdom standards. A software feature, “UK Analog Hardware
Support”, has been created to provide assistance in configuring the cards.
For a description of this feature, see Features and Services for Generic X11
Supplementary Features Appendix 2 to 553—2311—105.
References See the Meridian 1 Planning & Engineering Guide (NTCK04) for the
following information:
• Master index
• System overview
• Installation planning
• System engineering
• Spares planning
• Equipment identification and ordering.
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vi About this document
553-3001-173 UK Trunk Cards description
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:
• an overview of software architecture
• procedures for software installation and management
• a detailed description of all software features and services.
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1-1
UKTrunk cards description 553-3001-173
NT5K17 — Direct Dialling Inward trunk
card
Functional description
The NT5K17 Direct Dialing Inward (DDI) trunk card provides the
interface between a trunk and either an NT8D37 Intelligent Peripheral
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.
The NT5K17 DDI trunk card provides eight analog trunks, each trunk unit
can be configured individually to operate as Direct Dialing Inward trunks.
Refer to the “UK Analog Hardware Support” feature to assist in
configuring the NT5K17 circuit card. This feature is described in Features
and Services for Generic X11 Supplementary Features Appendix 2 to 553—
2311—105.
Common features
Each NT5K17 DDI Trunk card:
•indicates self-test status during an automatic or manual self-test. Self-
test pass is indicated on the faceplate LED.
•converts transmission signals from analog-to-digital and from digital-
to-analog for up to 8 audio paths
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1-2 NT5K17 Direct Dialing Inward Trunk Card
553-3001-173 UK Trunk cards description
• provides for loss pads appropriate to 3 dB, 6 dB and 8 dB Public
Switched Telephone Network (PSTN) lines as governed by the UK
System Loss plan
• provides termination impedance to match the UK three-component
complex network
• provides transhybrid balance matching against the UK complex
impedance
• provides Analog-to-Digital and Digital-to-Analog call path losses for
DDI trunk units, values downloadable in the initial configuration
stage.
Microprocessor
The NT5K17 DDI trunk card is equipped with an Intel 8052-type
microprocessor that controls card operation. The microprocessor also
provides the communication function for the card.
The NT5K17 DDI trunk card communicates with the controller card
through a serial communication link. Features provided through the serial
link include:
• card-identification
• self-test status reporting
• status reporting to the controller card
• maintenance diagnostics.
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. The signalling and
control portion of the card provides the means for analog loop terminations
to establish, supervise, and take-down call connections.
Signalling interface
Trunk signalling messages are three bytes in length. The messages are
transmitted in channel zero of the DS-30X in A10 format.
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NT5K17 Direct Dialing Inward Trunk Card 1-3
UK Trunk cards description 553-3001-173
Configuration information for the NT5K17 DDI trunk card is downloaded
automatically from the CPU during power-up or manually by commands
from maintenance programs.
Physical description
Measurements
Each NT5K17 DDI trunk card measures as follows:
He ig ht: 318 mm (12.5 in.)
De pth: 254 mm (10 in .)
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.
At the cross-connect terminal, each unit connects to external apparatus by
A and B leads. For detailed termination and cross-connect information, see
System installation procedures (553—3001—210).
Self-test
When the card is installed, the red Light Emitting Diode (LED) on the
faceplate flashes as the self-test runs. If the self-test completes
successfully, the card is automatically enabled (if it has been configured in
software) and the LED goes out. If the self-test fails, the LED will remain
lit. The LED will also remain lit if one or more units on the card become
disabled while the card is operating.
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1-4 NT5K17 Direct Dialing Inward Trunk Card
553-3001-173 UK Trunk cards description
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
Vo ltage Idle cu rrent Ac tive curren t
+
15.0 V dc 195 ma 195 ma
-15 V dc 240 ma 215 ma
+8.5 V dc 85 ma 85 ma
-48 V dc 50 ma 500 ma
+ 5.0 V dc 195 ma 175 ma
Environmental specifications
Table 1-2 lists the environmental specifications for the NT5K17 DDI card.
Table 1-2
NT5K17 Environmental specifications
Parameter Sp ecificatio ns
Operating
temperature 0 to 50 degrees C, ambient
Operating hum idity 5 to 95 % RH (non-condensing)
Storage temperature - 50 to + 70 degrees C
PAD switching
Loss values for the NT5K17 DDI trunk card are as follows:
Lo ss An alo g-to -Digital Digital-to -An alo g
PAD out -4 d B -3 d B
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