[Freeswitch-users] Exchange 2007 UM - DTMF problem

[Brian West]

Starting at zero means forever doesn't it?

/b

On Jun 28, 2008, at 2:32 PM, Michael Jerris wrote:

> It is an rfc violation to start at 0.  Thats a bug in your other  
> device.  In regards to the volume, it should not matter, we set it  
> based on what we had seen on a lot of other devices, we should  
> probably make that pass through in the same way we do duration.  I  
> doubt either of these is the problem.  Take a closer look at the pt  
> used for 2833 compared to what we negotiated, see if anything is  
> amiss there.  We have had people successfully interop with exchange  
> before, if they could chime in, also, check the wiki as there is a  
> page there.
>
> Mike
>
>
> On Jun 28, 2008, at 3:19 PM, UV wrote:
>
>> We’re almost done testing the (initial) interoperability between  
>> Freeswitch and the Exchange 2007 Unified-Messaging server. I’ll be  
>> happy to share our conclusions once we’re done.
>>
>> I have a couple of questions in this regards:
>> I’ve noticed the FS RFC2833 DTMF doesn’t work. It does work once  
>> the call placed in either bypass_media or pass-rfc2833. I’ve found  
>> the difference between the two scenarios was in the “RFC 2833 RTP  
>> Event” payload:
>> Working scenario: Event Duration starts from 0
>> Non-working scenario: Event Duration starts from 160.
>> Is that by design or a bug? If by design, how do I change that so  
>> the FS will start from 0?
>>
>> I’ve also found the Volume setting’s different: on FS it’s  
>> hardcoded 7 (/src/switch_rtp.c, line 1047: “rtp_session- 
>> >dtmf_data.out_digit_packet[1] = 7”). Other devices usually use 10.  
>> Any reason for that number? Just curious.
>>
>> Cheers,
>> UV
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>>
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