[Asterisk-Users] Dropping incompatible voice frame

[Joe Pukepail]

This is  known issue, we fixed it by putting an answer() in the dial plan
before it gets forwarded, the fix  transcode_via_sln=no (detailed in the bug
tracker) didn't work for me. YMMV.


http://bugs.digium.com/view.php?id=4101

On 6/28/06, Kevin Savoy <ksavoy at novo1.com> wrote:
>
>   Sorry if this has been posted before but I'm having an issue where I get
> the following on my CLI.
>
>
>
> ast_read: Dropping incompatible voice frame on Local/XXXXXXXXXX of format
> ulaw since our native form has changed to slin
>
>
>
> A call comes in on our main to toll free number on an AT&T T1 line and is
> sent to phone 4000. This is our secretary's desk. If she leaves the desk she
> forwards the phone to one of our sister companies so that they would answer
> the call. This call is sent back out the AT&T T1. If she answers the call
> and then forwards outside the building it works fine but if she forwards her
> phone outside the building to auto forward the call when she is away from
> her desk we get the above error. I have recreated this on my own phone (both
> hers and mine are Polycom 501's) and with a Cisco 7960. I also tried a
> different toll free number with the same results. I searched the internet
> and found four people having the same issue but none have gotten responses
> on how to fix it. Each time it was something similar where the call was
> redirected. I know the T1's are configured correctly because all other
> incoming and outgoing calls work fine until this error occurs. Then nothing
> works.
>
>
>
> I am using Asterisk 1.2.7.1 with Zaptel 1.2.5 and Libpri 1.2.2. I have
> tried using both a digium Wctxxp 4 port and RedFone's Fonebridges and have
> gotten the same result both ways so the problem is within Asterisk itself. I
> also tried allow=all in sip.conf  as well as specifically listing allow=
> slin and all other formats to no avail.
>
>
>
> Also when this happens the channel is no longer usable even though
> Asterisk thinks it is available. When the next call is placed it times out
> because that channel has been locked by the above error. The only way out is
> a complete reboot and reset of all systems. Not good.
>
>
>
> Any help would be greatly appreciated. If I had hair left I'd be pulling
> it out about now.
>
>
>
>
>
> Thanks
>
> _____________________
>
>
>
> *Kevin Savoy*
>
> *Business Unit Telecom Analyst*
>
> 2218 4th Ave W
>
> Williston, ND 58801
>
> Ph: 701-774-4023
>
> Fax: 701-774-2901
>
> http://www.novo1.com
>
> Novo 1 is a service mark of Novo 1, Inc
>
>
>
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