I noticed in a recent commit there has been some issues w/ the DTMF on TFGW..
I should point out (as the guy that runs TFGW) that FreeSwitch is not whats actually interpreting the DTMF... Its either a MetaSwitch or a CopperCom CSX... This being said, the fixed length DTMF the asterisk, and callweaver are stricken with can cause some serious issues for these platform as well as things like Sonus and others... The problem comes in that you are supposed to send a packet with the correct ptime that you negotiated in the SDP... So with asterisk its 20ms... So for 100ms DTMF you should have start, mid, mid, mid, end, end, end (you don¹t have to agree w/ my interpretation of 2833 DTMF, I don¹t think the guys who wrote it all agree on how the RFC should be interpreted) Unless its been changed since the original fork (and quite honestly I havent paid that much attention) the issue comes in when on a jittery link packets get out of order and this is easy to do with anything prior ot variable length DTMF in asterisk 1.4 because the codebase prior to that did not space the DTMF out correctly It would blast the entire 100ms burst out at one time... If we are still seeing that behaviour It will cause issues with all of the above listed hardware if there is any thing that can cause out of order packet arrival at the media gateway... (I¹ve seen double and tripple DTMF a few times) To avoid this, FreeSwitch supports a mode where 2833 is not actually interpretted but just passed thru... We (TFGW) uses Freeswitch to aggregate and route the traffic to either our west coast or east coast media gateways. Where the DTMF is finnally interpretted So that being said I am more then happy to help out in resolving the DTMF issues... If you want to contact me off list go for it... For anyone else... Dial(SIP/sip.tollfreegateway.com/1800558355) and have fun... Just send a valid CallerID or we¹ll reset it so theres no problems with the calls (some ixc¹s don¹t like crazy caller ID) If you operate a CallCenter or have a good bit of TollFree traffic you want to send over contact me off list... Also while I¹m on the TFGW stuff.. 1) You don¹t have to register to TFGW to send calls 2) You don¹t have to send us all your Options packets... They only serve to waste our bandwidth (that¹s our as in mine and yours) Ken Rice -- [EMAIL PROTECTED] [EMAIL PROTECTED] Custom FreeSwitch, Asterisk, CallWeaver developer
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