Specifications

Contents
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Cisco IOS Survivable Remote Site Telephony Version 4.0 System Administrator Guide
H.323 VoIP Call Preservation Enhancements for WAN Link Failures 97
Where to Go Next 97
Configuring Additional Call Features 99
Contents 99
Information About Configuring Additional Call Features 99
How to Configure Additional Call Features 99
Enabling Three-Party G.711 Ad Hoc Conferencing 100
Configuring MOH for G.711 VoIP and PSTN Calls 101
Configuring MOH from Flash Files 102
Defining XML API Schema 102
Where to Go Next 103
Setting Up Secure Survivable Remote Site Telephony 105
Contents 105
Prerequisites for Setting Up Secure SRST 105
Restrictions for Setting Up Secure SRST 106
Information About Setting Up Secure SRST 107
Benefits of Secure SRST 107
Cisco IP Phones Clear-Text Fallback During SRST 108
SRST Routers and the TLS Protocol 108
SRST Routers and PKI 109
Secure SRST Authentication and Encryption 110
Cisco IOS Credentials Server on Secure SRST Routers 111
Establishment of Secure SRST to the Cisco Unified IP Phone 111
How to Configure Secure SRST 113
Preparing the SRST Router for Secure Communication 113
Importing Phone Certificate Files in PEM Format to the Secure SRST Router 122
Configuring Cisco Unified CallManager to the Secure SRST Router 129
Enabling SRST Mode on the Secure SRST Router 132
Verifying Phone Status and Registrations 134
Configuration Examples for Secure SRST 138
Secure SRST: Example 138
Control Plane Policing: Example 143
Where to Go Next 144
Additional References 144
Related Documents 144
Standards 145
MIBs 145