> Since PING method suggested here is also a SIP method, I > don't quite understand what it can do that OPTIONS cant.
1) An OPTIONS is more of a security thread than a "PING". Thus the receiver might perform various authentication and other security checks against the OPTIONS. And the receiver could reduce the level of security when receiving a "PING". 2) An OPTIONS response can be large depending on what all is supported and what it is willing to expose. Thus it is more a capacity hit. And the response is more likely to be large enough to cause UDP fragmentation. Thus it can cause retries and other problems related to fragmentation. _______________________________________________ Sip-implementors mailing list [email protected] https://lists.cs.columbia.edu/cucslists/listinfo/sip-implementors
