Terminology ··················································································································· 130
SIP messages ················································································································ 132
SIP fundamentals ············································································································ 132
SIP security ·························································································································· 135
Signaling encryption ········································································································· 135
Media flow encryption ······································································································· 136
TLS-SRTP combinations ··································································································· 137
Support for basic QSIG call ······································································································ 137
VRF-aware SIP ····················································································································· 138
Hardware compatibility with SIP ································································································ 138
SIP configuration task list ········································································································· 138
Configuration prerequisites ································································································ 139
Configuring proxy server information for a SIP UA ·································································· 141
Configuring registration timers ···························································································· 141
Enabling SIP registration function ······················································································· 143
Configuring SIP routing ··········································································································· 144
Configuration prerequisites ································································································ 144
Configuration procedure (1: destination IP address) ································································ 145
Configuration procedure (2: SIP proxy server) ······································································· 145
Configuration procedure (3: destination domain) ···································································· 145
Configuring user information ····································································································· 146
Configuring transport layer protocol for SIP calls ··········································································· 147
Configuring UDP or TCP for outgoing SIP calls ······································································ 147
Configuring SIP security ·········································································································· 149
Configuring TLS for SIP sessions ······················································································· 149
Specifying the URL scheme for outgoing SIP calls ········································································ 151
Configuring SIP extensions ······································································································ 152
Strict SIP routing ············································································································· 152
Configuring periodic refresh of SIP sessions ········································································· 158
Configuring VRF-aware SIP ····································································································· 159
Configuring out-of-band SIP DTMF transmission mode ··························································· 165
Troubleshooting ····················································································································· 174
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