If the expiry time cannot be found in Contact header or Expires header, use the default value of 3600 seconds, which is specified in RFC 3261. Change-Id: I2607a398b96743614b01713cfd9b28f40386fac1
If the expiry time cannot be found in Contact header or Expires header, use the default value of 3600 seconds, which is specified in RFC 3261. Change-Id: I2607a398b96743614b01713cfd9b28f40386fac1