[asterisk-users] Calls drop + "Didn't get a frame from channel" log message

[gincantalupo]

Hi Jean,

I have an Asterisk 1.12.18 with about 30 pc each with a Doro SIP phone 
on an unknown LAN.
I think google is useless in cases like this.
Many of the system we are working on are in production and we cannot 
make tests with them so the only hope is to gather infos from people 
experiencing the same problems and trying to understand something from 
the code, maybe asking the developers for info...that's why I'd like to 
understand what kind of frames Asterisk is waiting for in order to find 
what is the cause of this problem (maybe this is not the right 
mailing-list ?)
The strangest thing is problems like this are still happening and remain 
unsolved.....but a PBX dropping calls (or not dropping at all, as 
sometime happens) is like a car without seats.....yes, you can drive, 
but it is not a comfortable experience!

Giorgio


Jean-Louis curty wrote:
> I have googled a lot to find solution to the same exact problem 
> described in your message but no real solution yet.
>
> here is my config
>
> 1 physical network
> 25 pc windows
> 25 phones IP330 & IP550 SIP 2.1.2 no vlan CDP disabled some with dhcp 
> some with fixed ip to see if there is a diff
>
> 3 switchs connected to each others
> 1 cisco switch 35xx for pcs
> 2 linksys 24P P OE for phones
>
> 1 patton PRI gateway to isdn
>
> 1 asterisk server 1.12.18 talking sip to Patton , for each phone, type 
> friend can re-invite no, nat no
>
> symptoms:
>
> call drop randomly , can be after 10 s or 2000 seconds ! same log 
> "didn't get frame etc
> fews drops per phones per day but very irritating for the customer :-(
>
>
> tried to power phones with adapters to avoid power pbs from the switch 
> , same result
>
> if someone met this problem before get an idea to fix it , I wd 
> appreciate !!!!!
>
> thanks
> jl
>
> On Tue, Jun 24, 2008 at 5:37 PM, gincantalupo 
> <gincantalupo at fgasoftware.com <mailto:gincantalupo at fgasoftware.com>> 
> wrote:
>
>     Hi,
>
>     sometimes Asterisk drops calls and shows "Didn't get a frame from
>     channel" in its log file. Unfortunately Google gives no answers
>     even if
>     a lot of people ask for help.
>     A fast look into the code shows Asterisk entering a loop where
>     voice is
>     been transferred and every loop Asterisk waits for a frame,
>     exiting the
>     loop if no frame has arrived. It seems to be a problem not
>     depending on
>     the kind of channel...happens with ISDN and PRI lines.
>     What is stopping the frames, making Asterisk exiting that loop and
>     dropping the calls?
>
>     Thank you.
>
>     Giorgio.
>
>
>     _______________________________________________
>     -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
>     AstriCon 2008 - September 22 - 25 Phoenix, Arizona
>     Register Now: http://www.astricon.net
>
>     asterisk-users mailing list
>     To UNSUBSCRIBE or update options visit:
>       http://lists.digium.com/mailman/listinfo/asterisk-users
>
>
> ------------------------------------------------------------------------
>
> _______________________________________________
> -- Bandwidth and Colocation Provided by http://www.api-digital.com --
>
> AstriCon 2008 - September 22 - 25 Phoenix, Arizona
> Register Now: http://www.astricon.net
>
> asterisk-users mailing list
> To UNSUBSCRIBE or update options visit:
>    http://lists.digium.com/mailman/listinfo/asterisk-users


-- 

_________________________________________________
Giorgio Incantalupo, mailto:gincantalupo at fgasoftware.com
FG&A srl - http://www.fgasoftware.com -
Voice at Work - The Agile PBX http://www.voiceatwork.eu
Tel: 02997663.14, Fax: 0291390172