Linksys WIP310 SPA500 Series and WIP310 IP Phone Administration Guide - Page 225

Cisco SPA 500 Series and Wireless IP Phone Field Reference SIP Tab B Parameter Mark All AVT packets SIP TCP Port Min SIP TCP Port Max CTI Enable Caller ID Header SRTP Method Hold Target Before REFER Description 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. Specifies the lowest TCP port number that can be used for SIP sessions. Defaults to 5060. Specifies the highest TCP port number that can be used for SIP sessions. Defaults to 5080. The CTI interface allows a third-party application to control and monitor the state of a phone that has registered with the Cisco SPA 9000. With this interface, an application can control a phone to initiate an outgoing call or answer an incoming call with a mouse click from a PC. Provides the option to take the caller ID from PAIDRPID-FROM, P-ASSERTEDIDENTITY, REMOTE-PARTYID, or FROM header. Selects the method to use for SRTP. Two choices are available: • x-sipura-legacy SRPT method • s-descriptor-new method compliant with RFC- 3711 and RFC-4568 The default value is "x-sipura." NOTE Not applicable to WIP310. Controls whether to hold call leg with transfer target before sending REFER to the transferee when initiating a fully-attended call transfer (where the transfer target has answered). Default value is "no," where the call leg is not held. NOTE Not applicable to WIP310. Cisco SPA 500 Series and WIP310 IP Phone Administration Guide 214