Nortel Communication Server 1000 Guide

Nortel Communication Server 1000
ISDN Primary Rate Interface
Maintenance
Release: 6.0
Document Revision: 03.01
www.nortel.com
NN43001-717
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Nortel Communication Server 1000
Release: 6.0
Publication: NN43001-717
Document release date: 11 May 2009
Copyright © 2003-2009 Nortel Networks
All Rights Reserved.
Sourced in Canada
LEGAL NOTICE
While the information in this document is believed to be accurate and reliable, except as otherwise expressly
agreed to in writing NORTEL PROVIDES THIS DOCUMENT "AS IS" WITHOUT WARRANTY OR CONDITION OF
ANY KIND, EITHER EXPRESS OR IMPLIED. The information and/or products described in this document are
subject to change without notice.
Nortel, the Nortel Logo, the Globemark, SL-1, Meridian 1, and Succession are trademarks of Nortel Networks.
All other trademarks are the property of their respective owners.
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3
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Contents
New in this release 7
Other 7
Revision History 7
How to get help 9
Getting help from the Nortel web site 9
Getting help over the telephone from a Nortel Solutions Center 9
Getting help from a specialist by using an Express Routing Code 10
Getting help through a Nortel distributor or reseller 10
Introduction 11
Subject 11
Applicable systems 11
Intended audience 12
Conventions 12
Related information 12
PRI fault clearing 15
Contents 15
PRI Red alarm (local alarm) 15
PRI Yellow alarm (remote alarm) 17
PRI problems 18
D-channel problems 19
Quick reference to PRI operations 21
Contents 21
PRI commands (LD 60) 22
PRI messages 23
DCHI quick reference 23
D-channel commands (LD 96) 23
DCH messages 25
MSDL commands 25
Maintenance service messages 25
PRI status check 27
PRI startup 30
Network Call Trace 31
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4
Primary Rate Interface maintenance 39
Contents 39
PRI commands (LD 60) 40
PRI alarm commands 42
PRI test commands 44
PRI tests 44
PRI error detection 48
TN-to-channel number conversion 53
Use the error counter 54
Replace the PRI 56
Pulsed E and M DTI2 signaling 56
D-channel maintenance 59
Contents 59
DCH commands (LD 96) 59
DCH tests 63
DCH traffic (LD 2) 66
MSDL local loopback test (NT6D80) 70
MSDL remote loopback tests (NT6D80) 72
Protocol log (PLOG) 74
Replace the DCHI 77
LD 60 - Loop Maintenance for SYS-12, AXE-10, SWE, SWISSNET, NUMERIS,
EuroISDN, NEAX-61, Asia-Pacific 78
Clock controller maintenance 79
Contents 79
Clock operation 79
Clock controller commands (LD 60) 82
Replace the clock controller 82
Clock controller cabling 85
ISDN Signaling Link maintenance 89
Contents 89
ISL status formats 89
ISL startup 91
ISL recovery 91
1.5 Mb DTI/PRI maintenance 93
Contents 93
Overview 93
Monitor DTI/PRI operation 93
DTI/PRI maintenance tools 97
1.5 Mb ISL maintenance 121
Contents 121
Overview 121
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ISL maintenance tools 124
2.0 Mb DTI maintenance 127
Contents 127
Overview 127
Monitor system DTI operation 129
System DTI maintenance tools 135
2.0 Mb PRI maintenance 143
Contents 143
Overview 143
Enable the 2.0 Mb PRI after installation 143
Disable the 2.0 Mb PRI before removal 145
Monitor system PRI operation 146
System PRI maintenance tools 157
2.0 Mb ISL maintenance 165
Contents 165
Overview 165
Setting up the D-channel 169
ISL maintenance 174
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Nortel Communication Server 1000
ISDN Primary Rate Interface Maintenance
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Copyright © 2003-2009 Nortel Networks
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New in this release
There have been no updates to the document in this release.
Other Revision History
May 2009 Standard 03.01. This document is up-issued to support Communication
Server 1000 Release 6.0.
December 2007 Standard 02.02. This document has been up-issued to support
Communication Server Release 5.5.
June 2007 Standard 01.02. This document is up-issued to remove the Nortel Networks
Confidential statement.
May 2007 Standard 01.01. This document is issued to support Communication
Server 1000 Release 5.0. This document contains information previously
contained in the following legacy document, now retired: ISDN Primary
Rate Interface Maintenance (NN43001-717). No new content has been
added for Communication Server 1000 Release 5.0. All references to
Communication Server 1000 Release 4.5 are applicable to Communication
Server 1000 Release 5.0.
August 2005 Standard 3.00. This document is up-issued to support Communication
Server 1000 Release 4.5.
September 2004 Standard 2.00. This document is up-issued for Communication Server 1000
Release 4.0.
October 2003 Standard 1.00 This document is a new technical document for Succession
3.0. It was created to support a restructuring of the Documentation Library,
which resulted in the merging of multiple legacy technical documents.
This new document consolidates information previously contained in the
following legacy documents, now retired:
•ISDN PRI: Maintenance (553-2901-501)
•1.5Mb DTI/PRI Description, Installation and Maintenance
(553-3011-310) . Content from 2.0Mb DTI/PRI Description, Installation
Nortel Communication Server 1000
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Copyright © 2003-2009 Nortel Networks
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8New in this release
and Maintenance (553-3011-310) also appears in ISDN Primary Rate
Interface Installation and Commissioning (NN43001-301).
•2.0Mb DTI/PRI Description, Installation and Maintenance (553-3011-315
2.0) . Content from 2.0Mb DTI/PRI Description, Installation and
Maintenance (553-3011-315 2.0) also appears in ISDN Primary Rate
Interface Installation and Commissioning (NN43001-301).
Nortel Communication Server 1000
ISDN Primary Rate Interface Maintenance
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11 May 2009
Copyright © 2003-2009 Nortel Networks
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9
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How to get help
This chapter explains how to get help for Nortel products and services.
Getting help from the Nortel web site
The best way to get technical support for Nortel products is from the Nortel
Technical Support web site:
http://www.nortel.com/support
This site provides quick access to software, documentation, bulletins, and
tools to address issues with Nortel products. From this site, you can:
•download software, documentation, and product bulletins
•search the Technical Support Web site and the Nortel Knowledge Base
for answers to technical issues
•sign up for automatic notification of new software and documentation
for Nortel equipment
•open and manage technical support cases
Getting help over the telephone from a Nortel Solutions Center
If you do not find the information you require on the Nortel Technical
Support web site, and you have a Nortel support contract, you can also get
help over the telephone from a Nortel Solutions Center.
In North America, call 1-800-4NORTEL (1-800-466-7835).
Outside North America, go to the following web site to obtain the telephone
number for your region:
http://www.nortel.com/callus
Nortel Communication Server 1000
ISDN Primary Rate Interface Maintenance
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Copyright © 2003-2009 Nortel Networks
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10 How to get help
Getting help from a specialist by using an Express Routing Code
To access some Nortel Technical Solutions Centers, you can use an
Express Routing Code (ERC) to quickly route your call to a specialist in
your Nortel product or service. To locate the ERC for your product or
service, go to:
http://www.nortel.com/erc
Getting help through a Nortel distributor or reseller
If you purchased a service contract for your Nortel product from a
distributor or authorized reseller, contact the technical support staff for that
distributor or reseller.
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ISDN Primary Rate Interface Maintenance
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Copyright © 2003-2009 Nortel Networks
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11
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Introduction
This document is a global document. Contact your system supplier or your
Nortel representative to verify that the hardware and software described
are supported in your area.
Subject This document provides maintenance procedures for ISDN Primary Rate
Interface (PRI) capability on Meridian 1 and CS 1000Msystems.
Note on legacy products and releases
This technical document contains information about systems, components,
and features that are compatible with Nortel Communication Server
1000 Release 5.5 software. For more information on legacy products
and releases, click the Technical Documentation link under Support &
Training on the Nortel home page:
www.nortel.com
Applicable systems
This document applies to the following systems:
•Communication Server 1000E (CS 1000E) CP PII, CP PIV and CP PM
•Communication Server 1000M Single Group (CS 1000M SG) CP PII,
CP PIV
•Communication Server 1000M Multi Group (CS 1000M MG) CP PII,
CP PIV
•Meridian 1 PBX 11C Chasis
•Meridian 1 PBX 11C Cabinet
•Meridian 1 PBX 61C CP PII, CP PIV
•Meridian 1 PBX 81C CP PII, CP PIV
Note: When upgrading software, memory upgrades may be required
on the Signaling Server, the Call Server, or both.
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ISDN Primary Rate Interface Maintenance
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Copyright © 2003-2009 Nortel Networks
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12 Introduction
System migration
When particular Meridian 1systems are upgraded to run CS 1000
software and configured to include a Signaling Server, they become CS
1000Msystems. Table 1 "Meridian 1 systems to CS 1000 systems" (page
12)lists each Meridian 1 system that supports an upgrade path to a CS
1000Msystem.
Table 1
Meridian 1 systems to CS 1000 systems
This Meridian 1 system... Maps to this CS 1000 system
Meridian 1 PBX 11C Chassis CS 1000E
Meridian 1 PBX 11C Cabinet CS 1000E
Meridian 1 PBX 61C CS 1000MSingle Group
Meridian 1 PBX 81C CS 1000MMulti Group
Intended audience
This document is intended for individuals responsible for maintaining ISDN
PRI capability on Meridian 1 and CS 1000M systems.
Conventions
Terminology
In this document, the following systems are referred to generically as
"system":
•Communication Server 1000E (CS 1000E)
•Communication Server 1000M (CS 1000M)
•Meridian 1
The following systems are referred to generically as "Small System":
•Meridian 1 PBX 11C Chassis
•Meridian 1 PBX 11C Cabinet
The following systems are referred to generically as "Large System":
•Communication Server 1000M Single Group (CS 1000M SG)
•Communication Server 1000M Multi Group (CS 1000M MG)
•Meridian 1 PBX 61CCP PII, CP PIV
•Meridian 1 PBX 81CCP PII, CP PIV
Related information
This section lists information sources that relate to this document.
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Related information 13
Technical Documentation
The following technical documents are referenced in this document:
•Features and Services Fundamentals (NN43001-106) ()
•Software Input Output Administration (NN43001-611) ()
•Software Input Output Reference - Maintenance (NN43001-711) ()
Online To access Nortel documentation online, click the Technical
Documentation link under Support & Training on the Nortel home page:
www.nortel.com
CD-ROM
To obtain Nortel documentation on CD-ROM, contact your Nortel customer
representative.
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ISDN Primary Rate Interface Maintenance
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Copyright © 2003-2009 Nortel Networks
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14 Introduction
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15
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PRI fault clearing
Contents This section contains information on the following topics:
“PRI Red alarm (local alarm)” (page 15)
“PRI Yellow alarm (remote alarm)” (page 17)
“PRI problems” (page 18)
“D-channel problems” (page 19)
PRI Red alarm (local alarm)
A PRI local alarm can indicate:
•1.5 Mb/2.0 Mb digital transmission problems
•a PRI card fault
Under any of these alarm conditions, all 24/30 B-channels are taken out
of service, and:
1. The PRI local alarm faceplate LED is lit.
2. Calls on the PRI are disconnected automatically.
3. All 24/30 B-channels are disabled.
4. After a pause of 2.5 seconds, the PRI sends a remote-alarm indication
to the far-end switch.
5. The appropriate Digital Trunk Diagnostic (DTA) message is printed,
and a minor alarm is raised on all attendant consoles within the same
customer group.
System software checks every 0-15 minutes (programmable) to see if a
clock-controller or reference-clock error has occurred.
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16 PRI fault clearing
If the 0-15 minute check finds the PRI in local alarm was a primary
clock source, the software switches the clock controller to the secondary
reference.
Channel restoration
When the alarm condition improves, the PRI is restored to service as
follows:
1. The local alarm is cleared.
2. After 11 seconds, the PRI stops sending a remote alarm indication to
the far end.
3. The D-channel automatically attempts to re-establish. If this is
successful, the B-channels are placed into the idle state and made
available for calls.
Figure 1 "PRI alarm timers" (page 16) shows the progression of the
system Red and Yellow (local and remote) alarm timers.
Figure 1
PRI alarm timers
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PRI Yellow alarm (remote alarm) 17
Procedure 1
Red alarm status check
Step Action
1Check PRI status using the following prompts:
LD 60
STAT (loop)
2Check PRI alarm counters using the following prompts:
LD 60
LCNT (loop)
3See Table 2 "PRI problem solving" (page 18) for solutions to
possible PRI problems.
--End--
PRI Yellow alarm (remote alarm)
A remote alarm on the system indicates the far end is out of service. The
fact that the PRI is receiving the remote-alarm pattern indicates that there
is transmission integrity, but the far end is not ready.
When the PRI receives the remote-alarm signal from the far end, all 24/30
B-channels are disabled.
Channel restoration
When the PRI stops receiving the remote alarm, the channels are placed
into the idle state.
Each time a Yellow alarm is generated, a counter is incremented. When
the Yellow alarm 24-hour threshold (prompt RALM in LD 73) is reached,
the PRI must be restored to service manually.
Procedure 2
Checking Yellow alarm status
Step Action
1Perform a PRI status check.
2Contact personnel at the far end to determine what action they
are taking.
When the Yellow alarm (remote alarm) 24-hour threshold is
reached (DTA006 is printed), do the following:
3Contact personnel at the far end to determine what action they
are taking.
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18 PRI fault clearing
4When the far-end troubles are cleared, reset the alarm counters
and disable, then enable, the PRI. To do this, use the following
commands:
LD 60
LCNT loop list alarm counters
RCNT loop reset alarm counters
DISL loop disable loop
ENLL loop enable loop
--End--
PRI problems
The PRI can have any of the following problems. Determine the cause of
the problem and follow the recommended actions provided in Table 2 "PRI
problem solving" (page 18).
Table 2
PRI problem solving
Symptom Action
No connection to far end.
(If the 1.5 Mb/2Mb transmission cable is not
physically connected to the far end,
frame-alignment errors occur.
The channels will be disabled, but the PRI will
be in local-alarm mode.)
Use the Error Counter to verify the 1.5 Mb/2.0
Mb digital transmission directly from the PRI
faceplate (RCV and XMT) to each connection
(cross-connect, repeater, and other such
equipment).
PRI fails self-test. Replace the PRI card.
Far-end problems, usually indicated by a
remote alarm. Do a PRI status check and contact personnel at
the far end for resolution.
PRI is connected but getting bit-rate or
frame errors.
This can be caused by:
•a bad 1.5 Mb/2Mb transmission cable
connection
•electrical or electromagnetic interference
•carrier problems (for example, defective
repeater)
Use the Error Counter to verify the 1.5 Mb/2Mb
digital transmission from the PRI faceplate (RCV
and XMT) to each connection (cross-connect,
repeater, and other such equipment).
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D-channel problems 19
Table 2
PRI problem solving (cont’d.)
Symptom Action
Configuration settings do not match the far
end.
These problems can occur during initial startup.
They may be indicated by:
•DTA 018 Frame-slip out-of-service limit
•DTA 021 Loss-of-frame-alignment for 3
seconds
•DCH 1003 D-channel MDL errors
See that the PRI parameters correlate to the
far-end parameters.
Cannot enable the PRI. Two reasons follow:
The far-end PRI is disabled, indicated by:
•PRI 000PRI is responding
•DTA 005 remote alarm occurred
Contact personnel at the far-end site to resolve
the problem.
•DCH 1010 DCHI is software disabled
Or, there is no 1.5 Mb/2Mb connection,
indicated by: See above, under No connection to far end.
•PRI 000 PRI is responding
•DTA 021 loss of frame alignment for 3
seconds
•DCH 1010 DCHI is software disabled
The system initializes and there are no
active B-channels. When a PRI or ISL trunk interfaces with another
system and the system initializes, you may have
to disable and then re-enable each B-channel.
D-channel problems
D-channel problems are indicated when the D-channel Handler Interface
(DCHI) releases after being enabled. This applies to both primary and
backup D-channels. For example:
Command Response Description
LD 96
ENL DCH N
DCH 1003 MDL error
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20 PRI fault clearing
Command Response Description
DCH 1006 link establishment error
DCH RLS DCHI released
If these messages appear, follow the steps in Table 3 "Procedure
3D-channel status check" (page 20).
Table 3
Procedure 3
D-channel status check
Step Action Response
1Check the status of the D-channel’s PRI.
2Clear any PRI problems.
3Contact the far end. If the far-end D-channel is down, the
DCH1006 message is printed.
4Test the DCHI using tests 100, 101, 200 and
201 (the tests must be run in sequential order).
5Print the protocol log using:
LD 96
PLOG DCH N
6Check the DCHI-to-PRI cable.
7Check DCHI card jumper settings.
8Check to see that one system is designated as
"master" (usually the larger system), and the
other as "slave."
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