[asterisk-users] Call Xfer issue between DataCenter and User Site

[Steven Davison]

Thanks for the responses on this one....

David Gibbons: reinvite=no is set, as we need the asterisk box to maintain the audio for recording... (I believe even if we didn't have this option, MixMonitor would have the same effect anyway.)

Peder: the firewall is integrated into the router, and is a Zyxel 660H-D1... which hasn't caused NAT issues in the past, but it is something that we can switch out and see if a different make/model has the same problem.

In answer to your questions, the Data Center IP is the external address that has been 1 to 1 Nat'd to the internal address.

The phone site has no static Nat in place for Sip or RTP, so we are reliant on the routers ability to sort that out. There is a firewall on that router, which allows ALL traffic out, and also allows SIP and RTP in. 

Hope that clears up a few things! :)

Steven Davison - Network Engineer
t:   0845 0034567
f:   0845 0034543
w: www.ntsols.com


 
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-----Original Message-----
From: asterisk-users-bounces at lists.digium.com [mailto:asterisk-users-bounces at lists.digium.com] On Behalf Of David Gibbons
Sent: 20 January 2010 18:24
To: asterisk-users at lists.digium.com
Cc: Alistair Mackenzie
Subject: Re: [asterisk-users] Call Xfer issue between DataCenter and User Site

Admittedly I didn't read your SIP debug (on the mobile), but do you have reinvite=no set for the extensions and SIP trunks (providers)?

This sounds on the surface like a classic case of the Mondays. Erm reinvites I mean.

<snip>
1. Incoming call from pstn/viop provider
2. Call is answered by a user
3. Call needs to be transferred
4. Xfer button is pushed, other user is called, answered, and they speak about the call
4b. The incoming call is held, listening to MoH
5. Xfer is pushed again,
6. <SIP Debug Output>
7. MoH stops,
8. Office user gets no audio
9. Incoming call is silent, and then call is dropped
10. Office user gets fed up of saying ‘hello??!?’ and hangs up.
</snip>
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