Cisco Voice Interworking Services (VISM) Operator's manual

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Cisco VISM Installation and Configuration
Guide
Release 3.0
June 2004
Text Part Number: OL-2521-01 D0

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Cisco VISM Installation and Configuration Guide
Copyright © 2004, Cisco Systems, Inc.
All rights reserved.

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Cisco VISM Installation and Configuration Guide
Release 3.0, Part Number OL-2521-01 Rev. D0, June 2004
CONTENTS
Preface xiii
Objectives xiii
Audience xiii
Document Organization xiii
Related Documentation xiv
Cisco MGX 8850 (PXM45) Multiservice Switch Release 3 xiv
MGX 8850 (PXM1) Multiservice Switch Release 1.2.10 xv
MGX 8250 Edge Concentrator Release 1.2.10 xvi
MGX 8230 Edge Concentrator Release 1.2.10 xvi
Conventions xvii
Obtaining Documentation xviii
Cisco.com xviii
Ordering Documentation xviii
Documentation Feedback xviii
Obtaining Technical Assistance xix
Cisco TAC Website xix
Opening a TAC Case xix
TAC Case Priority Definitions xx
Obtaining Additional Publications and Information xx
CHAPTER 1Overview of the VISM and VISM-PR Cards 1-1
VISM and VISM-PR Card Types 1-1
VISM and VISM-PR Card Service Types 1-5
VISM and VISM-PR Card Physical Characteristics 1-5
VISM Card Architecture 1-5
VISM and VISM-PR Card Features 1-6
Redundancy and Bulk Distribution 1-8
Operating Modes 1-9
VoIP Switching and Switched AAL2 PVC Operating Modes 1-9
AAL2 Trunking Operating Mode 1-11
VoIP Trunking Operating Mode 1-12
AAL1/AAL2 SVC Operating Mode 1-12
Installing VISM Hardware and Software 1-13
Installing VISM Cards in MGX 8000 Series Chassis 1-13

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Installing VISM-PR Cards in MGX 8000 Series Chassis 1-13
MGX 8850 and MGX 8250 Chassis 1-14
MGX 8230 Chassis 1-15
Installing VISM and VISM-PR Front and Back Cards 1-15
Installing a VISM or VISM-PR Front Card 1-15
Installing a VISM Back Card 1-16
Connecting Cables to Cards 1-16
Removing VISM and VISM-PR Front and Back Cards 1-17
Removing a VISM or VISM-PR Front Card 1-17
Removing a VISM Back Card 1-17
Applying Power to the VISM Card 1-18
Installing VISM Software Upgrades 1-18
Software Upgrades 1-20
Prerequisites 1-20
VISM/VISM-PR Upgrades with PXM1 1-20
Download VISM/VISM-PR Boot Code and Firmware to PXM1 1-20
Upgrade VISM/VISM-PR Firmware with PXM1 Card 1-21
Boot Code Upgrade Procedure with PXM1 Cards 1-23
VISM-PR Upgrades with PXM1E and PXM45 1-23
Download VISM-PR Boot Code and Firmware to PXM1E and PXM45 1-24
Upgrade VISM-PR Firmware with PXM1E and PXM45 Cards 1-24
Boot Code Upgrade Procedure with PXM1E and PXM45 Cards 1-25
VISM/VISM-PR Downgrade Procedure 1-25
VISM to VISM-PR Hardware Upgrade 1-26
CHAPTER 2Telephony Applications Using VISM 2-1
Tandem Switch Offloading 2-1
Multiservice Access 2-3
AAL2 Trunking 2-3
CHAPTER 3VISM Functional Description 3-1
TDM Line-Handling Function 3-2
Bearer Processing Function 3-3
Echo Cancellation, Voice Compression, A/Mu Law Conversion 3-3
Voice Activity Detection and Silence Suppression 3-4
Fax and Modem Tone Detection 3-4
Jitter Control 3-5
CAS Handling 3-5
Signaling Function 3-5

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CAS Processing in VoIP Switching and Switched AAL2 PVC Operating Mode 3-6
CCS Processing in Switched AAL2 PVC Operating Mode 3-9
CAS Processing in AAL2 Trunking Operating Mode 3-11
CCS Processing in AAL2 Trunking Operating Mode 3-11
ATM Voice Data Processing Function 3-11
Transporting Voice Cells with VoIP 3-11
Transporting Voice Cells with Switched AAL2 PVC 3-13
Transporting Voice Cells with AAL2 Trunking 3-14
Transporting Voice Cells with Switched AAL1 SVC 3-14
Call Control Function 3-15
Connection Model 3-16
xGCP Extensions for AAL2 Switched PVC and AAL2 SVC Operating Modes 3-17
Endpoint Service States 3-17
Restart In Progress Command 3-18
Connection Admission Control 3-19
Embedded VISM Management Function 3-19
CHAPTER 4Configuring VISM Features 4-1
Using the Command Line Interface 4-1
VISM Command Attributes 4-2
Connecting to Cisco MGX 8000 Series Platforms 4-2
Logging In to PXM and VISM Cards 4-3
VISM Card Prompt 4-5
Logging Out of VISM and PXM Cards 4-5
Configuring VISM Features 4-6
Initial VISM Configuration 4-6
Initial Card Level Configuration 4-8
Configuring the Operating Mode 4-8
Allocating Resources 4-9
Configuring Connection Admission Control 4-10
Placing the VISM Card In Service 4-11
Placing the VISM Card Out of Service 4-11
Configuring the TDM Side 4-11
Configuring T1 and E1 Lines 4-11
Configuring the PXM and VISM Cards Clocking Source 4-14
Configuring the PXM1E or PXM45 Card as Clocking Source 4-17
Configuring DS0 Channels 4-17
Configuring Bearer Processing 4-27
Configuring Codecs 4-27

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Configuring ECAN 4-29
Configuring Jitter 4-30
Configuring PNNI for AAL1/AAL2 SVCs 4-31
Configuring the ATM Network Side 4-31
Configuring PVC Connections for All Operating Modes 4-32
Configuring VoIP Switching/Trunking Operating Mode Parameters 4-34
Configuring AAL2 Trunking Operating Mode Parameters 4-36
Configuring Switched AAL2 PVC Operating Mode Parameters 4-38
Configuring the Call Agent Interface 4-44
Configuring Domain Names and IP Addresses 4-45
Setting Up Call Agents and Protocols 4-45
Configuring Gateway Control Protocols 4-47
Configuring ISDN PRI Backhaul 4-49
Configuring Additional VISM Features 4-52
Mid-Call DTMF 4-55
Configurable Jitter Buffer 4-55
Adjustable Gain 4-55
Adjustable Music On-Hold Threshold 4-55
CALEA 4-55
MGC Redundancy 4-55
External DNS 4-56
2 IP Address Support 4-56
VoIP Trunking 4-56
T.38 Fax Relay 4-57
CAS Feature Enhancements 4-57
Programmable Tone Plans 4-57
Loop Start, DID, and Delay Dial 4-58
FGD 4-58
Configure Flash Hook and Glare Condition Attributes 4-59
Configure ANI and DNIS Digit Order 4-59
RFC 3064 Package Support 4-59
RFC 2833 Support 4-59
VISM Network Continuity Test 4-59
Configure PVC OAM Cell Parameters 4-60
PXM1E and PXM45 Card-Only Features 4-60
Call Agent-Controlled VoATM AAL1 and AAL2 SVC 4-61
AAL1 SVC-Based TDM Hairpinning 4-61
High Complexity Codec Support for VISM-PR—G.723.1 4-61
Announcement File System 4-62
Announcement Timeouts 4-62

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Announcement Direction 4-62
Broadcast Announcements 4-63
Multiple Announcement Requests for the Same Endpoint 4-63
Announcement File Server 4-63
Announcement File Server Name 4-63
Announcement File Server Directory Structure 4-63
VISM Announcement Cache Management 4-64
Announcement Expiry 4-64
Permanent Announcements 4-64
Call Agent-Controlled T.38 Fax 4-65
Additional Support for MGCP 1.0 4-66
RSVP-Based Admission Control 4-66
Clock Slip Counters 4-67
RTP Connection Statistics 4-68
CAS Immediate Start and Ground Start Glare Handling 4-68
Grooming for Local Traffic 4-68
MGX 8000 Series Implementation Enhancements 4-69
Additional VBR Enhancements 4-69
Expanded Clock Source Selection 4-69
Private Network-to-Network Interface Priority Routing 4-69
Additional SPVC Connection Management Capabilities 4-70
192 T1/248 E1 DS0 Support with High Complexity Codecs on VISM-PR 4-70
Channel Alarm Enhancement 4-70
VISM TDM Line Statistics Collection 4-70
CHAPTER 5CLI Commands 5-1
CHAPTER 6Troubleshooting Tips 6-1
VISM Card LEDs 6-1
VISM and PXM Display, Log, and Diagnostic Loopback Path CLI Commands 6-2
VISM Display Card CLI Command 6-3
PXM Display Log CLI Command 6-3
PXM Diagnostic Loopback Path CLI Commands 6-4
PXM1E and PXM 45 Display CLI Commands 6-4
VISM Alarms 6-5
UNIX Snoop Trace Tool 6-5
Symptoms and Solutions 6-5
VISM Card Did Not Become Active 6-6
T1/E1 Configuration Mismatch 6-6

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DSP Download Failure 6-7
VISM Front Card/Back Card Mismatch 6-8
Cannot Use the cc Command to Access a VISM Card 6-9
VISM Card Resets Intermittently 6-9
VISM Card Does Not Accept a Firmware Download 6-9
Echo Is Heard on a Voice Call 6-9
VISM Card LEDs Are Not Lighted 6-9
Firmware Does Not See the Card Insert Bit Status As Set 6-10
APPENDIX AVISM and VISM-PR Card Clocking Options A-1
PXM1 Card as Primary Clocking Source A-1
VISM Card as Primary Clocking Source A-3
VISM-PR Card as Primary Clocking Source A-3
PXM1E or PXM45 Card as Primary Clocking Source A-4
Revertive and Nonrevertive Clocking A-4
APPENDIX BVISM and VISM-PR—3.0 Specifications B-1
VISM Card Specifications B-1
VISM Card Physical Interface Specifications and Applicable Standards B-1
General VISM Card Standards B-2
VISM Card Counters Specifications B-2
VISM-PR Card Specifications B-3
VISM-PR Card Features B-3
INDEX

FIGURES
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Figure 1-1 VISM T1 and E1 Front Cards 1-2
Figure 1-2 VISM-PR T1 and E1 Front Cards 1-3
Figure 1-3 VISM T1 and E1 Back Cards 1-4
Figure 1-4 Cisco MGX 8850 and VISM as a Voice Gateway 1-4
Figure 1-5 VISM Card Block Diagram 1-6
Figure 1-6 VISM Block Diagram for VoIP Switching and Switched AAL2 PVC Operating Modes 1-10
Figure 1-7 VISM Block Diagram for the AAL2 Trunking Operating Mode 1-11
Figure 1-8 Available Chassis Slots for VISM Cards in the MGX 8850 and MGX 8250—Front View 1-14
Figure 1-9 Available Chassis Slots for VISM Cards in the Cisco MGX 8230—Front View 1-15
Figure 1-10 RJ-48 PIN Connector 1-17
Figure 2-1 VISM Used in a Tandem Switch Offloading Application 2-1
Figure 2-2 VISM Used as a Voice Gateway Application 2-2
Figure 2-3 AAL2 Trunking—One End 2-3
Figure 2-4 AAL2 Trunking—Two Ends 2-4
Figure 3-1 VISM Detailed Functional Blocks 3-2
Figure 3-2 VISM Signaling Paths 3-6
Figure 3-3 CAS Processing—Message Structure 3-7
Figure 3-4 CAS Signaling in Initiating and Terminating a Call 3-8
Figure 3-5 PRI/Backhaul Path 3-10
Figure 3-6 RUDP Session Hierarchy 3-10
Figure 3-7 VoIP Protocol Stack 3-12
Figure 3-8 VoIP Cell Packetization and Transmission 3-12
Figure 3-9 AAL2 Cell Packetization and Transmission 3-14
Figure 3-10 Call Agent Communications Links 3-15
Figure 3-11 Connection Model 3-16
Figure 3-12 VISM Card Config Screen—Card Elements Display 3-20
Figure 3-13 VISM Card Config Screen—VISM Features Display 3-21
Figure 4-1 PXM Back Card 4-3
Figure 4-2 VISM to Call Agent Communication 4-44
Figure 6-1 VISM Front Card LEDs 6-2
Figure A-1 VISM Configured for Local Clocking A-1

Figures
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Figure A-2 VISM Configured for Loop Clocking A-3