Hi, I am facing an issue with SDP. FS is getting an INVITE with media parameters in SDP as "m=image 23456 udptl t38". For this FS is responding with "m=image 0 udptl 19" in its 183 response. This is correct as per RFC's. Unfortunately my ITSP is expecting the same format what it is sent (i.e. t38 instead of 19). Is there any way in Freeswitch I can specify to the send same format values in response. I tried to look into the code, it is mentioned that 19 is used as it is not used by anybody it is used. (sdp_print.c in libsofia_sip_ua_static project). Could someone please help me how to send all format values that were send in INVITE. Of course according to SDP standards it is enough to send one value. I want to know how to send at least one value which is same as sent in INVITE. Thanks & Regards Suneel