Cisco 521SG Administration Guide - Page 105
BroadSoft Conference Package. Defaults to no., Cisco SPA IP phones include Session
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Configuring SIP, SPCP, and NAT Configuring SIP 4 Parameter Description Notify Conference If set to yes, Cisco SPA IP phones send out a NOTIFY with event=conference when starting a conference call (with the BroadSoft Conference Package). Defaults to no. RFC 2543 Call Hold If set to yes, Cisco SPA IP phones include Session Description Protocol (SDP) syntax c=0.0.0.0 when sending a SIP re-INVITE to a peer to hold the call. If set to no, Cisco SPA IP phones do not include the c=0.0.0.0 syntax in the SDP. With either setting, the phone includes a=sendonly syntax in the SDP. Defaults to yes. Random REG CID On Reboot If set to yes, Cisco SPA IP phones use a different random call-ID for registration after the next software reboot. If set to no, the phone tries to use the same call-ID for registration after the next software reboot. With either setting the phone uses a new random call-ID for registration after a powercycle. Defaults to no. Not applicable to the Cisco WIP310. Mark All AVT packets If set to yes, all audio video transport (AVT) tone packets (encoded for redundancy) have the marker bit set. If set to no, only the first packet has the marker bit set for each DTMF event. Defaults to yes. SIP TCP Port Min Lowest TCP port number that can be used for SIP sessions. Defaults to 5060. SIP TCP Port Max Highest TCP port number that can be used for SIP sessions. Defaults to 5080. Keep Referee When REFER Failed When set to yes, the phone immediately handles NOTIFY sipfrag messages. Cisco Small Business SPA300 Series, SPA500 Series, and WIP310 IP Phone Administration Guide 104