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CHAPTER
8-1
Catalyst 4224 Access Gateway Switch Software Configuration Guide
OL-2031-02
8
Configuring Survivable Remote Site
Telephony
Survivable Remote Site Telephony (SRST) provides Cisco CallManager with
fallback support for Cisco IP Phones that are attached to the Catalyst 4224 Access
Gateway Switch (Catalyst 4224) on your local Ethernet.
SRST enables the Catalyst 4224 to provide call handling support for
Cisco IP Phones when a Cisco IP Phones lose connection to the remote primary,
secondary, or tertiary Cisco CallManager or when the WAN connection is down.
This section contains following topics:
• Overview of Survivable Remote Site Telephony, page 8-2
• Configuring Survivable Remote Site Telephony, page 8-7
• Verifying Survivable Remote Site Telephony, page 8-9
• Troubleshooting Survivable Remote Site Telephony, page 8-10
• Monitoring and Maintaining Survivable Remote Site Telephony, page 8-11
• SRST Configuration Example, page 8-12
- Catalyst 4224 Access Gateway 1
- CONTENTS 3
- 6 Configuring VoIP 6-1 8
- Contents 10
- OL-2031-02 10
- 10 Traffic Shaping 10-1 11
- Objectives 17
- Audience 18
- Organization 18
- Related Documentation 19
- Obtaining Documentation 21
- Ordering Documentation 22
- Documentation Feedback 22
- Cisco.com 23
- Technical Assistance Center 23
- Cisco TAC Website 24
- Cisco TAC Escalation Center 25
- Product Overview 27
- Features 28
- Solution 29
- IP Telephony 31
- VoIP Gateway 32
- IP Routing and WAN Features 33
- Quality of Service 35
- VPN and Firewall Features 35
- Application Notes 36
- DSP Allocation 37
- InterVLAN Routing 40
- Layer 2 QoS 40
- Separate Voice and Data VLANs 41
- Layer 3 QoS 42
- Configuration Guidelines 44
- Voice Port Configuration 47
- Recommended Configurations 48
- No VTP or DTP Support 49
- Creating a VLAN 49
- Trunking 50
- Fractional PRI Configuration 50
- No Ring Back Tone Generated 51
- IP Multicast Support 55
- First-Time Configuration 57
- Booting the Catalyst 4224 58
- Connecting a Terminal 59
- Connecting a Modem 59
- Interface Numbering 60
- Using the Cisco IOS CLI 61
- Getting Help 62
- Default Switch Configuration 66
- Voice Traffic and VVID 69
- Sample Configuration 1 70
- Sample Configuration 2 70
- Multiple Ports 73
- Adding Trap Managers 75
- Configuring IP Information 75
- Removing an IP Address 77
- Configuring Voice Ports 78
- Managing the ARP Table 81
- MAC Addresses and VLANs 83
- Adding Secure Addresses 84
- Removing Secure Addresses 85
- Adding Static Addresses 86
- Removing Static Addresses 87
- Interfaces 94
- Table 4-2 ISDN Switch Types 99
- Configuring T1 Interfaces 100
- Configuring E1 Interfaces 104
- Saving Configuration Changes 107
- Configuring Voice Interfaces 109
- MGCP Configuration 111
- Enabling MGCP 112
- • E&M Wink Start 116
- • E&M Delay Start 116
- Sample Configuration 123
- H.323 Gateway Configuration 124
- FXS Emulation Example 129
- FXO Emulation Example 131
- E&M Emulation Example 131
- Configuring ISDN BRI Lines 134
- Gateway 1 Configuration 138
- T1/E1 Configuration (H.323) 139
- T1/PRI Configuration Example 141
- E1/PRI Configuration Example 142
- Scenario 143
- San Jose 144
- Salt Lake City 144
- Configuring VoIP 147
- Prerequisite Tasks 148
- Configuration Tasks 149
- Configure RSVP for Voice 151
- RSVP Configuration Example 152
- • Links slower than two Mbps 153
- Configure Custom Queuing 157
- Configure Number Expansion 158
- Configure Dial Peers 161
- Configure POTS Dial Peers 166
- Configure VoIP Dial Peers 167
- Configure Voice Ports 168
- Verifying Your Configuration 170
- Troubleshooting Tips 171
- Configure E&M Voice Ports 173
- Fine-Tune E&M Voice Ports 176
- Configure RSVP for Dial Peers 180
- Conventions 188
- Configuring FXS Voice Ports 188
- Validating the Configuration 190
- Fine-Tuning FXS Voice Ports 192
- Activating the Voice Port 194
- Telephony 201
- Restrictions 202
- Prerequisites 203
- Supported Features 203
- Fallback Behavior 204
- SRST Configuration Example 212
- Voice Gateways 215
- Overview 216
- Cisco Fax Relay 217
- Traffic Shaping 219
- About Traffic Shaping 220
- • A specific configured rate 221
- Discard Eligible Bit 222
- Generic Traffic Shaping 224
- Configuration and Commands 225
- Class-Based Traffic Shaping 226
- Frame Relay Traffic Shaping 227
- How It Works 228
- Derived Rates 228
- Distributed Traffic Shaping 230
- Configuration 231
- Low-Latency Queueing 232
- Interface 242
- Verifying the Configuration 243
- Sample Configurations 243
- Configuration File for Peer 1 248
- Configuration File for Peer 2 250
- Novell IPX 253
- IPX MIB Support 254
- IPX Enhanced IGRP Support 254
- IPX Configuration 255
- Phase One: SNA Centric 258
- Phase Two: IP Transport 259
- Phase Three: IP Client 260
- Phase Four: IP Centric 261
- Summary of Four-Phase Model 261
- Line Consolidation 262
- FEP Replacement 262
- Desktop Consolidation 263
- SNA Configuration 264
- APPENDIX 265
- Syntax Description 266
- Defaults 266
- Command Modes 266
- Usage Guidelines 266
- Examples 269
- VoIP Overview 277
- A Voice Primer 278
- Numbering Scheme 279
- Analog Versus Digital 279
- Mean Opinion Score 280
- Signaling 283
- VoIP Configuration Examples 285
- Router San Jose Configuration 292
- FXO Gateway to PSTN 294
- OL-2031-01 299
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