SIP Timers

SIP transaction timers

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;