Some SIP servers implement special features using special character, such as sipphone.com, dial "*0" to know if your ATA is behind a NAT router.
In an interoperability test. One of the the server failed to interoperate with ATA. We find it's because the contact field in the 200 OK message (Contact: *30 <sip: [EMAIL PROTECTED]:5080> ). Since there is the special character *, the "*" in "contact" header has some special meanning in some SIP messages .
In another test with sipphone.com, we dial "*0" to tell if the unit is behind NAT. The sipphone server returns 200 OK with contact header (Contact: <sip:[EMAIL PROTECTED]>). We can successfully interoperate with them.
I am wondering which server's implementation follows RFC. Are there any information you can point me to read?
Thanks, Wei _______________________________________________ Sip-implementors mailing list [EMAIL PROTECTED] http://lists.cs.columbia.edu/mailman/listinfo/sip-implementors
