[Freeswitch-users] Exchange 2007 UM - DTMF problem

[UV]

The only page I found on UM is
http://wiki.freeswitch.org/wiki/Exchange_2007_UM and even there it’s stated
“bypass_media_true was used because DTMF was not interpreted by FreeSWITCH
(bug ?)” so I guess they couldn’t make it work as well.

 

In a working scenario (using SJPhone) the Event Duration starts from 0 (in
the first packet) and then 160, 320, 480 and so forth until three identical
packets of 2280. In the non-working scenario (no pass though), it’s exactly
the same but without the first packet of Event Duration 0.

 

 

  _____  

From: freeswitch-users-bounces at lists.freeswitch.org
[mailto:freeswitch-users-bounces at lists.freeswitch.org] On Behalf Of Brian
West
Sent: Sunday, June 29, 2008 6:02 AM
To: freeswitch-users at lists.freeswitch.org
Subject: Re: [Freeswitch-users] Exchange 2007 UM - DTMF problem

 

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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