Re: [Astlinux-users] No audio when incoming SIP trunk calls forwarded by endpoint back out of same SIP trunk

[Michael K. <li...@mk...>]

> Am 30.03.2020 um 14:32 schrieb The Cadillac Kid via Astlinux-users <ast...@li...>:
> 
> Ive had this same issue..  while im not running on astlinux on my production sites..  ive found that I needed to do one of 2 things..  
> anchor the media at the asterisk server, so the directmedia = no  on the SIP trunk, and in the SIP settings I needed to have my externip = my.public.ip.here  and localnet = 172.16.0.5/255.255.252.0   (use your localnet)..  it seems that the forward sends the Internal IP of asterisk in the redirect for the forward..   
> 
> I Ihandle my forwarding a little different. I handle it on the server as opposed to the phone..  (I have XML apps that forward the call in asterisk and light  the lamp on the phone when the user presses the key)..  those sites where the call is forwarded at asterisk vs the phone itself seem to fare a little better..  the reason I do this is the call still forwards even if ther phone gets unplugged, and the user can use our web-based User interface to turn their forward on / off remotely or change it. 
> 
> in one case. the SIP provider is velocity, I had to actually Answer(), establish audio then transfer the call before 2 way audio would establish..   I accomplished this by answering then playing a quick "please hold" then sending the call off to the external number..   

Hi Christopher,

the tip with "Answer" (and playing music during transfer ("m-option" of the Dial command)) worked fine!

> I can give you nore details if you wish to do this method
> -Christopher
> 
> On Monday, March 30, 2020, 4:09:09 AM EDT, Tom Chadwin <tom...@nn...> wrote:
> 
> 
> Morning all
> 
> We have a SIP trunk, with ample channels. With staff at home, they have tried to forward their phones to their home numbers. They do this on the endpoints themselves (Snom D305). However, it's not working. An incoming external call hits the phone, and is forwarded, rings, and is answered. However, after pickup, there is no audio either way.
> 
> Can anyone think of any reason why this might be happening?
> 
> Thanks
> 
> Tom
> 
> 
> Tom Chadwin, ICT Manager


Michael

http://www.mksolutions.info