[Freeswitch-users] Problem with Siemens A580 IP Phones

[Michael Jerris]

It doesn't look like your call ever gets setup in this trace, if you enable the sip trace you might see a bit more, but it looks like we are receiving a 480 response from the called phone.

Mike

On Nov 15, 2009, at 12:42 PM, vedamaker at netscape.net wrote:

> 
> I am FS beginner and I have a basic PBX setup using FS with the Siemens A580 IP Phones.  I thought everything was working fine since I could make and receive basic calls without any obvious issues.  However, recently I wanted to use more advanced functions in FS and discovered that I could not use any of DTMF based functions (e.g. call transfer/record) during calls with the Siemens IP phones.  The same functions work fine when I use a softphone.  So, I started looking at the log file and I think there is some problem between the Siemens IP phones and FS (log file attached below).  It seems that when a call comes in, FS calls the extensions and then the extensions send back confirmation and SIP status codes.  With softphone extensions, I see 180 (Ringing) and 200 (OK) as normal status.  However, with Siemens IP phone extensions, I see 480 (Temporarily Unavailable) which seems to cause FS to terminate the session.  So, FS log shows there is actually no active session which explains why it does not performs DTMF detection for the call session.  However, the call to Siemens IP phones actually continues with ringing when an extension handset answers the call is established with the caller with full voice communication.  I don't know how FS works but this seems very strange.  I would like to know how to get FS to work properly with Siemens IP phones including the DTMF functions during calls.  Any help would be appreciated. 
> 

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