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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

United Kingdom

Содержание NT5K17

Страница 1: ...escription 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 United Kingdom United Kingdom...

Страница 2: ...01 173 UKTrunk cards description Publication history July 17 1993 Standard release 1 1 March 1992 Standard release 1 0 United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United...

Страница 3: ...s 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...

Страница 4: ...ontrol 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 descript...

Страница 5: ...mply 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 Serv...

Страница 6: ...em upgrades procedures General maintenance information Fault clearing Hardware replacement See the Generic X11 Including Supplementary Features NTCK09 for the following information an overview of soft...

Страница 7: ...rds 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...

Страница 8: ...DI 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 reportin...

Страница 9: ...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 i...

Страница 10: ...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 Environmenta...

Страница 11: ...NT5K17 Direct Dialing Inward Trunk Card 1 5 UK Trunk cards description 553 3001 173 PAD in 2 d B 1 d B United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom...

Страница 12: ...nts a high impedance of 8 5K ohms or greater to the DDI unit the NT5K17 DDI trunk card is in the idle state Ground is present on the A wire and negative battery 48V is present on the B wire Seize The...

Страница 13: ...spond by returning to the idle state Near End Release When the Meridian 1 disconnects the call the CPU sends a message to the DDI unit which in turn will respond by returning to the idle state When th...

Страница 14: ...s Dialing Break High Im pedance Loop Make Low Impedance Loop Answer 48V on w ire Ground on B wire Public Exchange disconnects first Far End Release High Impedance Loop Fa r End Release acknow ledgemen...

Страница 15: ...trunk cards Refer to the UK Analog Hardware Support feature to assist in configuring the NT5K18 circuit card This feature is described in Features and Services for Generic X11 Supplementary Features A...

Страница 16: ...ssor which controls card operation The microprocessor also provides the communication function for the card The NT5K18 Exchange Line trunk card communicates with the controller card through a serial c...

Страница 17: ...h 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 cr...

Страница 18: ...cu rrent Ac tive curren t 15 0 V dc 330 ma 330 ma 8 5 V dc 70 ma 70 ma 48 0 V dc 30 ma 30 ma 5 0 V dc 250 ma 250 ma Environmental specifications Table 2 2 lists the environmental specifications of th...

Страница 19: ...PPM or Subscriber Pulse Metering SPM as it is sometimes called For information on features and signalling arrangements see Generic X11 including supplementary features PO730484 or NTCK09 in the UK Gr...

Страница 20: ...ion is configured in software and is implemented in the card through software download messages Idle state When the Exchange Line trunk is idle it provides a high impedance toward the public exchange...

Страница 21: ...the idle conditions from the A and B wires for a timed period When the Meridian 1 receives the signal it returns to the idle state Loop Guarded Release operation The Meridian 1 clears a call by repla...

Страница 22: ...c Switched Telephone Network PSTN and Direct Outward Dialing DOD calls for billing or administration Note Although the PPM feature is configured on a per trunk basis the message which is downloaded to...

Страница 23: ...1 CE PE module can hold up to ten NT5K19 Analog Tie trunk cards Refer to the UK Analog Hardware Support feature to assist in configuring the NT5K19 circuit card This feature is described in Features a...

Страница 24: ...ured on a per port basis in software provides termination against 600 ohms for 4 wire E M trunk circuits provides termination and transhybrid balance matching against the UK three component complex im...

Страница 25: ...1 system core The NT5K19 Analog Tie trunk card uses the Intel 83C51FA microprocessor It contains 8K of Read Only Memory ROM and 256 bytes of Random Access Memory RAM It operates asynchronously to the...

Страница 26: ...3 4 NT5K19 Analog Tie Trunk Card 553 3001 173 UK Trunk cards description De pth 254 mm 10 in United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom...

Страница 27: ...us by A and B leads For detailed termination and cross connect information see System installation procedures 553 3001 210 Technical description The technical details of the NT5K19 Analog Tie trunk ca...

Страница 28: ...non condensing Storage temperature 50 to 70 degrees C PAD switching Table 3 3 presents the digital to analog and analog to digital loss for the NT5K19 Analog Tie trunk card Table 3 3 NT5K19 loss valu...

Страница 29: ...g arrangements see Generic X11 Including Supplementary Features PO730484 or NTCK09 in the U K 2 wire and 4 wire E M Type 1 trunk operation DC 5 The NT5K19 Analog Tie trunk card supports the United Kin...

Страница 30: ...re to the far end The incoming end far end recognizes the seize signal busies the circuit against outgoing calls and prepares to receive digits The continued receipt of the seizing signal by the far e...

Страница 31: ...than 300 milliseconds 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 The system...

Страница 32: ...receive levels Du ration oftone High Low To ne On dB L evel less than 300 m s High 4 to 2 0 dBm O 300 to 550 m s High 4 to 2 0 dBm O greater than 550 ms Low 14 to 30 dBm O Idle state In the idle stat...

Страница 33: ...going PBX as a backward hold signal Call disconnect Either party can disconnect the call by applying the appropriate signal The incoming PBX applies a clear back signal while the outgoing PBX applies...

Страница 34: ...NT5K19 Analog Tie Trunk Card 553 3001 173 UK Trunk cards description Clea r Back To ne on for longer than 300 ms United Kingdom United Kingdom United Kingdom United Kingdom United Kingdom United King...

Страница 35: ...ge The announcement source requires the following an impedance of 4 ohms or less ground to the trunk unit when playing and an open circuit when idle This is done through a control lead to the trunk ci...

Страница 36: ...4 ohms or less generation of a control pulse 150 300 ms at the start of the announcement period default signal level of 9dBm in 600 adjustable to a level of 10 dBm The announcement machine may provide...

Страница 37: ...mplifier system When accessed the circuit card will provide a loop closure In a typical application the loop closure will cut off a music supply and switch the paging trunk transmission path to the pa...

Страница 38: ...rthern 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 Printed in Canada United Kingdom United...

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