SIP transaction (SIP T) timers T1, T2 and T4 can be configured as per the bearer type. The default SIP T timer values for GPRS bearer are 3, 16 and 17secs. The default SIP T timer values,for WLAN is 500ms, 4secs and 5secs. The read operation on SIP T timers is alwayspass and write operation requires writedevicedata capability.
The central repository keys for SIP T timers and its CenRep UIDs are as follows:
// SIP stack Configuration parameters. const TUid KCRUidSIP = { 0x101FED88 }; // SIP transaction timers for GPRS bearer in milliseconds as per RFC3261. // For SIP T timer T1 const TUint32 KSIPTransactionTimerLANT1 = 0x01; // For SIP T timer T2 const TUint32 KSIPTransactionTimerLANT2 = 0x02; // For SIP T timer T4 const TUint32 KSIPTransactionTimerLANT4 = 0x03; //SIP transaction timers for LAN bearer in milliseconds as per RFC3261. // For SIP T timer T1 const TUint32 KSIPTransactionTimerLANT1 = 0x0b; // For SIP T timer T2 const TUint32 KSIPTransactionTimerLANT2 = 0x0c; // For SIP T timer T4 const TUint32 KSIPTransactionTimerLANT4 = 0x0d;