asterisk users - Jun 2008 - Calls drop + "Didn't get a frame from channel" log message

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.

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>
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.
>
>
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