Table Of Contents

Feature Information for Configuration of SIP Trunking for PSTN Access (SIP-to-SIP)

Feature Information for Configuration of SIP Trunking for PSTN Access (SIP-to-SIP)

Table 1 lists the release history for this chapter.

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Note Table 1 lists only the Cisco IOS software release that introduced support for a given feature in a given software release train. Unless noted otherwise, subsequent releases of that software release train also support that feature.

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Table 1 Feature Information for Configuration of SIP Trunking for PSTN Access (SIP-to-SIP) Features 

Feature Name	Releases	Feature Information
Out-of-dialog OPTIONS Ping to Monitor Dial-peers to Specified SIP Servers and Endpoints	15.0(1)M	This feature provides a keepalive mechanism at the SIP level between any number of destinations. The generic heartbeat mechanism allows Cisco UBE to monitor the status of SIP servers or endpoints and provide the option of busying-out associated dial-peer upon total heartbeat failure. The following command was introduced: voice-class sip options-keepalive

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Any Internet Protocol (IP) addresses used in this document are not intended to be actual addresses. Any examples, command display output, and figures included in the document are shown for illustrative purposes only. Any use of actual IP addresses in illustrative content is unintentional and coincidental.

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