Nortel Meridian 1 Option 11C Manual
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Nortel Meridian 1 Option 11C Manual

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Meridian 1
Option 11C
1.5 Mb DTI/PRI
Document Number: 553-3011-310
Document Release: Standard 13.00
Date: January 2002
Year Publish FCC TM
Copyright © 1992–2002 Nortel Networks
All Rights Reserved
Printed in Canada
Information is subject to change without notice. Nortel Networks reserves the right to make changes in design
or components as progress in engineering and manufacturing may warrant. This equipment has been tested
and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the
radio interference regulations of Industry Canada. These limits are designed to provide reasonable protection
against harmful interference when the equipment is operated in a commercial environment. This equipment
generates, uses and can radiate radio frequency energy, and if not installed and used in accordance with the
instruction manual, may cause harmful interference to radio communications. Operation of this equipment in a
residential area is likely to cause harmful interference in which case the user will be required to correct the
interference at their own expense.
SL-1 and Meridian 1 are trademarks of Nortel Networks.

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Summary of Contents for Nortel Meridian 1 Option 11C

  • Page 1 All Rights Reserved Printed in Canada Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant. This equipment has been tested and found to comply with the limits for a Class A digital device pursuant to Part 15 of the FCC rules, and the radio interference regulations of Industry Canada.
  • Page 3 Page 3 of 100 Revision history January 2002 Standard 13.00. This global document is up-issued for Release 25.40. December 2000 Standard 12.00. This global document is up-issued to include updates and changes required for Option 11C IP Expansion field trials with Release 25.3x software.
  • Page 4 Page 4 of 100 Revision History July 1994 Issue 4.00, Standard, published for Generic X11 Release 19.0x. February 1994 Issue 3.00, Standard, published for Generic X11 Release 18.0x. January 1993 Issue 2.00, Standard, published for Generic X11 Release 17.0x. April 1992 Issue 1.00, Standard, published for Generic X11 Release 16.0x.
  • Page 5 Page 5 of 100 Contents About this guide ......PRI Implementation ......DTI Implementation .
  • Page 6 Page 6 of 100 Contents 553-3011-310 Standard 13.00 January 2002...
  • Page 7 Page 7 of 100 About this guide This document contains specific information on how to configure ISDN DTI/PRI on Meridian 1 Option 11C systems. For general information, and for information on software features, refer to Networking Features and Services (553-2901-301).
  • Page 8 Page 8 of 100 About this guide 553-3011-310 Standard 13.00 January 2002...

  • Page 9: Table Of Contents

    Page 9 of 100 PRI Implementation Contents This section contains information on the following topics: Reference list ..........Overview .

  • Page 10: Overview

    Page 10 of 100 PRI Implementation Set the switches ..........24 Insert the NTAK09 into the main cabinet .

  • Page 11: Hardware Requirements

    PRI Implementation Page 11 of 100 Hardware Requirements Circuit cards To implement PRI on the Meridian 1 Option 11C, the hardware shown in Table 1 on page 11 is required. Table 1 Required Circuit Cards Circuit card Description NTRB21 DTI/PRI TMDI card.

  • Page 12: Hardware Description

    Page 12 of 100 PRI Implementation Note: Contact your Nortel Networks Sales representative for specific local CSU requirements. Hardware description NTRB21 TMDI card The NTRB21 TMDI card provides 1.5 MBit/s Digital Trunk Interface or Primary Rate Interface functionality on the Option 11C. The NTRB21 has a built-in downloadable D-channel which may occupy any single card slot (1-9), in the Option 11C main cabinet.
  • Page 13 PRI Implementation Page 13 of 100 Figure 1 NTRB21 TMDI card faceplate TMDI MAINT ........RS232 Monitor Port ......Option 11C 1.5 Mb DTI/PRI...

  • Page 14: Ntak09 Dti/Pri Circuit Card

    The NTAK09 Digital Trunk Interface/Primary Rate Interface (DTI/PRI) card provides the physical interface for the DS-1 facility T-1 carrier on the Meridian 1 Option 11C. It is required for PRI and DTI operation and is also used for ISL shared-mode applications.

  • Page 15: Ntak20 Clock Controller (Cc) Daughterboard

    PRI Implementation Page 15 of 100 NTAK20 Clock Controller (CC) daughterboard Digital Trunking requires synchronized clocking so that a shift in one clock source will result in an equivalent shift of the same size and direction in all parts of the network. On Option 11C systems, synchronization is accomplished with the NTAK20 clock controller circuit card in each Main and IP Expansion cabinet.
  • Page 16 Page 16 of 100 PRI Implementation Tracking mode In tracking mode, one or possibly two DTI/PRI cards supply a clock reference to a clock controller daughterboard. When operating in tracking mode, one DTI/PRI is defined as the primary reference source for clock synchronization, while the other is defined as the secondary reference source (PREF and SREF in LD 73).

  • Page 17: Clock Controller Led States

    PRI Implementation Page 17 of 100 Clock controller LED states The clock controller LED, on the NTAK09 or NTRB21 faceplates, will be in various states, depending on the status of the clock controller: Table 2 Clock Controller LEDs Clock controller On (Red) NTAK20 is equipped and disabled.

  • Page 18: Ntbk51Ba Downloadable D-Channel Daughterboard

    Page 18 of 100 PRI Implementation A minimum of one NTAK93 is required for each PRI link. If more than one PRI link is connected to the same end location, a single DCHI circuit card can support up to a maximum of eight PRI connections for the Option 11C system.
  • Page 19 PRI Implementation Page 19 of 100 If in PRI mode, first S/W disable the associated D-channel using the following overlay and commands: LD 96 DIS DCH x (Where x is the DCH port number that was assigned in LD 17). If the Clock Controller is enabled, first S/W disable it using the following overlay and commands: LD 60 DIS...

  • Page 20: Mount The Ntak20 Daughterboard On The Ntrb21

    Page 20 of 100 PRI Implementation Disable the NTRB21 TMDI card using the following overlay and commands: LD 96 DIS TMDI x where x is the NTRB21 TMDI card number (DLOP). The card number associated with a NTRB21 TMDI card is based on the slot in which the card is installed.

  • Page 21: Mount The Ntak93 Or Ntbk51 Daughterboard On The Ntak09

    PRI Implementation Page 21 of 100 Figure 3 NTAK20 Daughterboard installation Connector Socket Stiffeners 1 2 3 4 Connector Pins LEDs NTAK20 Clock Controller Bantam Jacks Mounting Holes Standoffs 553-9024 Mount the NTAK93 or NTBK51 daughterboard on the NTAK09 Mount the NTAK93 DCHI or NTBK51 DDCH daughterboard before the NTAK20 daughterboard.
  • Page 22 Page 22 of 100 PRI Implementation From an overhead viewpoint, with the daughterboard parallel above the NTAK09 and the connector pins aligned over the connector sockets, line up the mounting holes on the daughterboard (Figure 4) with the tops of the standoffs on the NTAK09.
  • Page 23 PRI Implementation Page 23 of 100 Figure 4 Daughterboard installation Connector Pins Connector Socket Stiffeners 1 2 3 4 NTAK20 Clock Controller Mounting Holes LEDs Bantam Jacks NTAK93 DCHI NTBK51BA DDCH Standoffs Switch 553-8295.EPS Option 11C 1.5 Mb DTI/PRI...

  • Page 24: Remove The Daughterboards From The Ntak09

    Page 24 of 100 PRI Implementation Remove the daughterboards from the NTAK09 Use these guidelines to remove the NTAK20 CC, and the NTAK93 DCHI or NTBK51 DDCH daughterboards from the NTAK09 DTI/PRI card. Because of the physical layout of the mother and daughterboards, the NTAK20 should be removed before the NTAK93 or NTBK51.

  • Page 25: Insert The Ntak09 Into The Main Cabinet

    PRI Implementation Page 25 of 100 Insert the NTAK09 into the main cabinet Insert the NTAK09 circuit card into slots 1-9 in the Main cabinet, or in slots 11-19, 21-29, 31-39, 41-49 of the first, second, third, and fourth IP Expansion cabinets, respectively.

  • Page 26: Install Ip Daughterboards

    Page 26 of 100 PRI Implementation Install IP daughterboards Refer to Option 11C Planning and Installation (553-3021-210). Software enable the DTI/PRI cards Software enable the NTRB21 TMDI card Enable the NTRB21 TMDI card using the following overlay and command: LD 96 ENL TMDI x where x is the NTRB21 TMDI card number (DLOP).

  • Page 27: Program Basic Pri

    PRI Implementation Page 27 of 100 Note: The DCHI and PRI cards must be programmed prior to software enabling the NTAK09. Refer to the section “Program Basic PRI” on page 27 for further information. • Under normal conditions, this step enables the clock controller and D-channel interface.

  • Page 28: Program Procedure

    Page 28 of 100 PRI Implementation Program procedure Note: Before installing PRI cards in IP expansion cabinets, first configure the expansion cabinets for IP connectivity. Refer to Overlay 117 in the Meridian 1 Software Input/Output guide (553-3001-511) for further information. To implement PRI on Meridian 1 systems, do the following: Add a PRI card.
  • Page 29 PRI Implementation Page 29 of 100 LD 17 – Add a D-channel Interface. Prompt Response Description Change existing data. TYPE ADAN Action Device And Number. - ADAN NEW DCH xx Add a primary D-channel (any unused SDI port.) CHG DCH xx Change a primary D-channel.
  • Page 30 Page 30 of 100 PRI Implementation Prompt Response Description - DRAT 64KC D-channel transmission rate. - SIDE NET (USR) Prompted only if IFC is set to SL1. NET = network, the controlling switch. USR = slave to the controller. - RLS X11 software release of far-end.
  • Page 31 PRI Implementation Page 31 of 100 LD 15 – Define a PRI customer. Prompt Response Description REQ: Add new data. Change existing data. TYPE Networking Data. CUST 0-31 Customer number. LDN0 xxxx Listed Directory number 0 must be defined for ISDN PRI DID service.
  • Page 32 Page 32 of 100 PRI Implementation Prompt Response Description - PNI (0) 1-32700 Private Network Identifier. Each customer data block must have a unique PNI when multi-customer option is equipped. PNI = 1 is typical for CUST = 0. It must be matched by the PNI in the far-end RDB.
  • Page 33 PRI Implementation Page 33 of 100 Prompt Response Description DTRK Digital trunk route - DGTP 1.5 Mb PRI. Prompted only if PRA = YES in LD15. ISDN ISDN option - MODE Route used for PRI only - - PNI (0) 1-32700 Private Network Identifier.
  • Page 34 Page 34 of 100 PRI Implementation LD 14 – Define service channels and PRI trunks. Prompt Response Description Add new data Change existing data Note: When assigning several members at once use the multiple create command NEW XX. TYPE TIE trunk only, allowed between MSL-1. c ch Enter the PRI trunk card (c) and channel number (ch).
  • Page 35 PRI Implementation Page 35 of 100 SREF CC1 11-19 Card slot number of PRI card containing the secondary clock reference for IP Expansion cabinet 1. 21-29 Card slot number for Clock Controller 2. PREF CC2 21-29 Card slot number of PRI card containing the prImary clock reference for IP Expansion cabinet 2.
  • Page 36 Page 36 of 100 PRI Implementation 553-3011-310 Standard 13.00 January 2002...
  • Page 37 Page 37 of 100 DTI Implementation Contents This section contains information on the following topics: Overview ..........Hardware Requirements .

  • Page 38: Channel Service Units

    Since Release 25.30 software, digital trunks are supported in Option 11C IP expansion cabinets. Hardware Requirements To implement DTI on the Meridian 1 Option 11C, the hardware listed in Table 5 on page 38 is required: Table 5 DTI hardware...

  • Page 39: Hardware Description

    DTI Implementation Page 39 of 100 Note: Contact your Nortel Networks Sales representative for specific local CSU requirements. Hardware description Refer to “Hardware description” on page 12. Install DTI hardware For information on how to install the NTRB21 DTI/DTI card, refer to “Insert/remove the NTRB21 TMDI card”...

  • Page 40: Software Enable The Dti/Dti Cards

    Page 40 of 100 DTI Implementation The NTBK04 is twenty feet long. If additional distance is required, the NT8D97AX fifty-foot extension is available up to a 600 foot maximum. The only cable required to support the NTAK09 circuit card is the NTBK04. If you require pinout information on the NTBK04 cable, refer to Table 7.

  • Page 41: Software Enable The Ntak09 Card

    DTI Implementation Page 41 of 100 The system should respond DCH N EST OPER, meaning that the D-channel is established and operational. Software enable the NTAK09 card Use step 1 to enable NTAK09 DTI/DTI card. If the clock controller and D-channel interface are not enabled in step 1, go to step 2.

  • Page 42: Program The Dti

    Page 42 of 100 DTI Implementation • Within about 30 seconds, the D-channel layer 3 should be established. To confirm, request the current status of the D-channel by issuing the command • The system should respond DCH N EST OPER, meaning that the D-channel is established and operational.
  • Page 43 DTI Implementation Page 43 of 100 CEQU Changes to common equipment DLOP c dd ff Where : • c is the DTI/PRI digital card number 1-9 (main cabinet), 11-19 (IP expansion cabinet1), 21-29 (IP expansion cabinet 2), 31-39 (IP expansion cabinet 3), 41-49 (IP expansion cabinet 4.) •...
  • Page 44 Page 44 of 100 DTI Implementation Direct Inward Dial Trunk data block TIE Trunk data block Foreign Exchange= Trunk data block DTRK Digital trunk route LD 14 – Configure the trunks. Prompt Response Description Add new data Change existing data TYPE One of the trunk types defined in step 3.
  • Page 45 DTI Implementation Page 45 of 100 SREF CC0 Card slot number of DTI card containing the secondary clock reference for the Main cabinet (this is the system clock.) 11-19 Card slot number for Clock Controller 1. PREF CC1 11-19 Card slot number of DTI card containing the prImary clock reference for IP Expansion cabinet 1.
  • Page 46 Page 46 of 100 DTI Implementation 553-3011-310 Standard 13.00 January 2002...
  • Page 47 Page 47 of 100 DTI/PRI Maintenance Contents This section contains information on the following topics: Reference list ..........Maintenance overview .

  • Page 48: Reference List

    Page 48 of 100 DTI/PRI Maintenance Reference list The following are the references in this section: • X11 System Messages Guide (553-3001-411) Maintenance overview From a maintenance perspective, Option 11C DTI/PRI operation consists of these major aspects: • hardware and software states •...
  • Page 49 DTI/PRI Maintenance Page 49 of 100 Table 8 Maintenance messages Message Meaning Digital Trunk Alarms (Resident Monitor) Resident CC Monitor Digital Trunk Interface and CC (LD60) Primary Rate Interface Message descriptions Maintenance messages provide near and far end switch status. Both service and service acknowledge messages are supported on PRI B-channels and ISL channels.
  • Page 50 Page 50 of 100 DTI/PRI Maintenance Table 9 Maintenance message and status combinations B or ISL Channel Near-End Status Far-End Status capability In-service In-service Incoming and outgoing call allowed In-service Maintenance Incoming calls allowed only In-service Out-of-service Not allowed to use Maintenance Not allowed to use Out-of-service...

  • Page 51: Alarms

    DTI/PRI Maintenance Page 51 of 100 B-channel or ISL channel status change Whenever there is a status change for a B-channel or an ISL channel, the new status is reported to the far end via a service message. Status change can occur through service change or maintenance operations, such as the addition or deletion of a channel in LD 14, or disabling of the associated loop, shelf, card or unit in LD 30, LD 32, LD 36, LD 41, or LD 60.

  • Page 52: Option 11C Dti/Pri Maintenance Tools

    Page 52 of 100 DTI/PRI Maintenance It is possible, however, that the T1 connection is one-way only — that is, receiving only, since this end is receiving the alarm. The yellow alarm is transported in one of two ways: using digit-2 or the facility data link (DG2 or FDL).
  • Page 53 DTI/PRI Maintenance Page 53 of 100 WARNING Extreme care must be taken when enabling the D-channel message monitoring option due to the possible heavy volume of messages during normal traffic. Use this command only during very light or no traffic conditions for trouble-shooting purposes. Remember to disable the monitoring tool when you are finished —...
  • Page 54 Page 54 of 100 DTI/PRI Maintenance Table 12 D-channel commands (LD 96) (Part 1 of 2) Command Action DIS DCH N Disable DCHI port N DIS MSGI N Disable monitoring of incoming D-channel messages on link N Monitor remains active until disabled.
  • Page 55 DTI/PRI Maintenance Page 55 of 100 Table 12 D-channel commands (LD 96) (Part 2 of 2) Command Action TEST-100/101/200/201 See DCH tests in NTP STAT SERV Print the current service and service acknowledge message for DCHI N ENL SERV N Enable service messages for DCHI N DIS SERV N Disable service messages for DCHI N...

  • Page 56: Tmdi Maintenance Commands

    Page 56 of 100 DTI/PRI Maintenance Table 13 Downloadable D-channel (DDCH) commands (LD 96) (Part 2 of 2) PTRF DCH X Print traffic report on MSDL DCHX TEST LLB X Start local loop back test on MSDL DCH X TEST RLB X Start remote loop back test on MSDL DCH X Note: “X”...

  • Page 57: Ntak09 Dti/Pri Power On Self-Test

    DTI/PRI Maintenance Page 57 of 100 Table 15 D-channel monitoring commands (Part 2 of 2) Command Action ENL TMDI x MSGO Enable monitoring of outgoing D-channel messages on link TMDI card x. ENL TMDI x DBG Enable debugging on TMDI card x. DIS TMDI x DBG Disable debugging on TMDI card x.

  • Page 58: Ntak20 Power On Self-Test

    Page 58 of 100 DTI/PRI Maintenance Table 17 on page 58 provides the state of the NTAK09 LEDs during the self-test procedure. Table 17 NTAK09 LED states during self-test Action LED State Power up system Top five LEDs on for eleven seconds Self-test in progress Top five LEDs go off for one second If the self-test passes, the top five LEDs flash...

  • Page 59: Dti/Pri Local Self-Test

    DTI/PRI Maintenance Page 59 of 100 Self-tests of the NTAK93 daughterboard are invoked manually by commands in LD 96. DTI/PRI local self-test The local self-test, also called a local loopback test, checks speech path continuity, zero code suppression, remote alarm detection, and A and B bit signalling.
  • Page 60 Page 60 of 100 DTI/PRI Maintenance The automatic loop test checks the same functions as the manual self test, but runs automatically as part of the midnight routines. ATLP 0 disables one idle channel at random and performs a single channel self test.
  • Page 61 DTI/PRI Maintenance Page 61 of 100 Coordinate the tests When a technician at the far end requests a remote loopback on the local Meridian 1: • Disable the DCHI (for PRI DCHL or BCHL) using LD 96: LD 96 DIS DCH N •...
  • Page 62 Page 62 of 100 DTI/PRI Maintenance Figure 5 DTI/PRI link diagnostic and remote loopback tests Option 11C Far End Switch NTAK09 NTAK93 RMST L RLBK L Running remote In loop - back mode loop - back test (Link Diagnostic test) Note: The remote loop-back Note: The switch must be test cannot be performed...

  • Page 63: Dti/Pri Error Detection

    DTI/PRI Maintenance Page 63 of 100 DTI/PRI error detection Bit error rate Bit error rate monitoring detects errors in transmission. (See Figure 6). There are two methods of bit error monitoring: bipolar violation tracking and Cyclic Redundancy Check (CRC). If the D2, D3 or D4 framing format is selected in LD 17 prompt DLOP, then bipolar violation tracking is implemented.
  • Page 64 Page 64 of 100 DTI/PRI Maintenance Cyclic Redundancy Check The Extended Superframe Format (ESF) contains a checksum of all data in the frame. The receiving side uses the checksum to verify the data. The primary difference between BPV and CRC is that bipolar violation tracking indicates errors in the local span, while CRC indicates errors on an end to end span.
  • Page 65 DTI/PRI Maintenance Page 65 of 100 Figure 7 BIPV and BIPC thresholds DTA 011--maintenance threshold A warning message is printed BIPV 1-(3)-4 1-(2)-4 DTA 012--out-of-service threshold The PRI is taken out of service and red alarm (local alarm) is raised. The PRI is restored automatically when performance improves (indicated by DTA 014)

  • Page 66: Frame Slip

    Page 66 of 100 DTI/PRI Maintenance Frame slip Digital signals must have accurate clock synchronization for data to be interleaved into or extracted from the appropriate timeslot during multiplexing and de-multiplexing operations. A frame slip is defined as the repetition of, or deletion of, the 193 data bits of a DS-1 frame due to a sufficiently large discrepancy in the read and write rates at the buffer (clocks aren't operating at exactly the same speed).
  • Page 67 DTI/PRI Maintenance Page 67 of 100 Types of synchronization Clock synchronization can be either tracking on the primary or secondary reference clock or free run (non-tracking). In LD 73 (prompts PREF and SREF), the DTI/PRI which supports the clock controller daughterboard is defined as the primary clock reference.
  • Page 68 Page 68 of 100 DTI/PRI Maintenance Figure 8 Frame slip tracking thresholds DTA 015--maintenance threshold A warning message is printed SRTK 1-(5)-24 1-(30)-3600 DTA 016--out-of-service threshold. The PRI is taken out of service and red alarm (local alarm) is raised. The Slip Rate Improvement monitoring (SRIM and SRMM) will be invoked.
  • Page 69 DTI/PRI Maintenance Page 69 of 100 Free run (non-tracking) mode A maintenance threshold and an out of service threshold are set in LD 73 as described below. See Figure 9 on page 69 for additional information.: LD 73 - SRNT prompt Prompt Response Description...

  • Page 70: Frame Slippage Improvement Timers

    Page 70 of 100 DTI/PRI Maintenance Frame slippage improvement timers Once the frame slip out-of-service threshold has been reached, the DTI/PRI software will invoke a Slip Rate Improvement mechanism to monitor the slippage and return the DTI/PRI card to service if some criteria has been met. The criteria used to determine that the slip rate has improved enough to return a DTI/PRI card to service is that the maintenance threshold is exceeded less than M (SRMM defines M) times in N (SRIM defines N).

  • Page 71: Frame Alignment

    DTI/PRI Maintenance Page 71 of 100 Figure 10 Frame slip improvement timers SRIM (1)-127 DTA 026--frame slip out-of-service limit has been reached while monitoring frame slip improvement. Trunks remain out-of-service, and improvement timer is restarted. DTA 028--frame slip maintenance limit has been reached while monitoring frame slip improvement.
  • Page 72 Page 72 of 100 DTI/PRI Maintenance There are three frame alignment thresholds set in LD 73. When a maintenance or out of service threshold is reached, a DTA message is output as shown below. DTA019 Fame alignment maintenance limit DTA020 Frame alignment out of service limit Figure 11 Frame alignment thresholds...
  • Page 73 DTI/PRI Maintenance Page 73 of 100 If a loss of frame alignment condition persists for three seconds, the affected DTI/PRI card is taken out of service and a red alarm (local alarm) is raised. See Figure 12. If the loss of frame alignment condition clears at least 15 seconds, the DTI/PRI is automatically restored to service.
  • Page 74 Page 74 of 100 DTI/PRI Maintenance Tracking mode In tracking mode, one or possibly two DTI/PRI cards supply a clock reference to a clock controller daughterboard. When operating in tracking mode, one DTI/PRI is defined as the primary reference source for clock synchronization, while the other is defined as the secondary reference source (PREF and SREF in LD 73).

  • Page 75: Automatic Clock Recovery

    DTI/PRI Maintenance Page 75 of 100 Reference clock errors Meridian 1 software checks every 15 minutes to see if a clock controller or reference clock error has occurred. In tracking mode, the clock controller is tracking on one reference clock. If a clock controller error is detected, or there is a problem with the reference clocks, the system will switch to free run mode.

  • Page 76: Replace Equipment

    Page 76 of 100 DTI/PRI Maintenance Replace equipment Use the following procedure before you reseat the NTAK09, the NTAK20 and/or the NTAK93: If the NTAK93 DCHI daughterboard is installed, first S/W disable the associated D-channel (DCHI) using the following overlay and commands: LD 96 DIS Where X is the DCHI port number that was assigned in LD17.
  • Page 77 DTI/PRI Maintenance Page 77 of 100 Figure 14 Wrist strap connection to the Option 11C cabinet INTER J1 J2 J4 J5 J6 J7 J8 J9 J10 wrist strap 553-8289.EPS To remove the NTAK20 Clock Controller daughterboard, grasp the NTAK20 at opposite corners and gently “wiggle” it back and forth until all four corners are free.
  • Page 78 Page 78 of 100 DTI/PRI Maintenance 553-3011-310 Standard 13.00 January 2002...
  • Page 79 Page 79 of 100 ISL Implementation Contents This section contains information on the following topics: Reference list ..........Overview .

  • Page 80: Hardware Requirements

    Two modes of ISL are available: shared and dedicated. This chapter covers the most common type of Nortel Networks ISL installation, an ISDN Signaling Link (ISL) installation in dedicated mode using dedicated and leased lines.
  • Page 81 ISL Implementation Page 81 of 100 Using Leased Line, the requirements are: Hardware Comments NTAK02 D-channel Handler Interface (DCHI) Card for ISL mode Modem Modem capable of the following: (such as Ventel 2400-33 or 2400 Plus II) -minimum of 2400 baud -synchronous operation -must support leased line (also known as private line or point-to-point) operation...
  • Page 82 Page 82 of 100 ISL Implementation Using Dial-up modems The requirements for using a dial-up modem are: Hardware Comments NT8D09 500 set line card NTAK02 D-channel Handler Interface (DCHI) Card (for ISL mode) Modem Modem capable of the following: (such as Ventel 2400-33 or 2400 Plus II) -minimum of 2400 baud -synchronous operation...

  • Page 83: Restrictions And Limitations

    ISL Implementation Page 83 of 100 ISL Hardware Installation (dedicated mode) Use this procedure to install hardware for an ISDN Signaling Link (ISL) in dedicated mode using dedicated leased lines. For shared mode, the hardware installation is identical to the PRI installation found in “PRI Implementation”...
  • Page 84 Page 84 of 100 ISL Implementation Table 20 NTAK02 Jumper settings Jumper Unit Strap for DTE Strap for DCE location Unit 0 C - B B - A Unit 1 C - B B - A C - B B - A Unit 2 C - B B - A...

  • Page 85: Software Programming

    ISL Implementation Page 85 of 100 If the installation is a dedicated mode using leased line modem configuration, the D-channel connects the DCHI with the far-end modem over a dedicated leased line. The modems must have a minimum transmission rate of 2400 baud and must support leased line capability and synchronous mode, 2-wire or 4-wire operation.
  • Page 86 Page 86 of 100 ISL Implementation Restrictions and limitations The DCHI in this case uses the NTAK02 circuit card and does not support ISDN PRI signaling. The DCHI is reserved for ISL use only. The D-channel can communicate with the far end by means of a dedicated leased line modem or dial-up modem.
  • Page 87 ISL Implementation Page 87 of 100 DCHL PRI card number (Must match entry for CDNO) SIDE NET (USR) Net: network, the controlling switch User: slave to controller X11 software release of far-end. This is the current software release of the far end. If the far end has an incompatible release of software, it prevents the sending of application messages, for example, Network Ring Again.
  • Page 88 Page 88 of 100 ISL Implementation TRSH 0-15 Assign a threshold set or table RALM 1-(3)-128 Yellow alarm 24-hour threshold BIPC 1-(2)-128 24-hour bit rate violation threshold LFAC 1-(3)-128 24-hour loss of frame alignment threshold BIPV 1-(3)-4 Bit rate (bipolar violation and CRC) monitoring limits for 1-(2)-4 maintenance and out-of-service thresholds SRTK...
  • Page 89 ISL Implementation Page 89 of 100 HNPA Telephone area code for this Meridian 1. Sent as part of setup message as calling line identification. HNXX Telephone local exchange code for this Meridian 1. Sent as part of setup message as calling line identification.
  • Page 90 Page 90 of 100 ISL Implementation DTRK YES/NO Enter YES if this is a Digital Trunk Interface (DTI or PRI) ISDN ISDN option MODE ISLD Route for ISL application DCHI DCHI port no. in CFN which will carry the D-channel for this TIE trunk route.

  • Page 91: Program Shared Mode

    ISL Implementation Page 91 of 100 Program Shared mode The same DTI/PRI software programming sequence can be used as for Dedicated mode, with the following exceptions: In LD 17: Prompt Response Description D-channel for ISL in “shared” mode, used for both ISDN PRI and ISL.
  • Page 92 Page 92 of 100 ISL Implementation 553-3011-310 Standard 13.00 January 2002...

  • Page 93: The Following Are The References In This Section

    Page 93 of 100 ISL Maintenance Contents This section contains information on the following topics: Reference list ..........Maintenance overview .
  • Page 94 Page 94 of 100 ISL Maintenance Option 11C maintenance provides several tools, either manual or automatic, for maintaining effective ISL operation. These tools are service commands (accessible through the software overlays), and diagnostic routines. Maintenance messages The following sections describe service messages that can appear on the Option 11C maintenance TTY as a result of ISL operation.
  • Page 95 ISL Maintenance Page 95 of 100 Service and service acknowledge messages for B-channels and ISL channels report the following statuses: • in-service • maintenance • out-of-service Near-end and far-end sub-categories are defined for each maintenance status. See the table below for possible combinations of near-end and far-end statuses and the channel capability for each status.
  • Page 96 Page 96 of 100 ISL Maintenance D-channel establishment When the D-channel establishes, the B-channel status is supported by sending service messages for each B-channel controlled by a D-channel. This allows the far end to synchronize its channel states. These services messages are sent when the D-channel is brought up automatically by the system or manually by using LD 96.
  • Page 97 ISL Maintenance Page 97 of 100 Activate service messages You activate the service messages in LD 96 on a D-channel basis. The commands are: Table 23 D-channel messages Command Description ENL SERV N turns on the support of service and service acknowledge messages for DCH link N.
  • Page 98 Page 98 of 100 ISL Maintenance Option 11C ISL maintenance tools Maintenance commands Table provides a quick reference lists of important ISL commands. WARNING Ensure that other TTYs and D-channels residing on the NTAK02 are disabled. IMPORTANT Extreme care must be taken when enabling the D-channel message monitoring option due to the possible heavy volume of messages during normal traffic.
  • Page 99 ISL Maintenance Page 99 of 100 Table 24 D-channel commands (LD 96) (Part 2 of 2) ENL MSGI N enable incoming D-channel messages on link ENL MSGO N enable outgoing D-channel messages on link EST DCH N establish D-channel N PLOG DCHI N print D-channel statistics log N RLS DCH N...
  • Page 100 Page 100 of 100 ISL Maintenance Figure 17 ISL back-to-back connection Port 1, DCHI Y NTAK02 Port 3, DCHI X In LD 17: DCHI X DCHI Y INTERNAL CLOCK EXTERNAL CLOCK SLAVE MASTER 553-8293 553-3011-310 Standard 13.00 January 2002...
  • Page 102 1.5 Mb DTI/PRI Copyright © 1992–2002 Nortel Networks All Rights Reserved Information is subject to change without notice. Nortel Networks reserves the right to make changes in design or components as progress in engineering and manufacturing may warrant. This equipment has been...

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