[asterisk-users] Large issue - having trouble diagnosing.

[Steve Totaro]

On Jan 20, 2008 11:04 PM, Cameron Hissey <camhissey at gmail.com> wrote:

> Hello,
>
> I am having a lot of trouble with my deployment of Asterisk. I am running
> the PBX-In-a-flash turnkey of Asterisk and ever since deployment I have had
> many different problems. I have managed to get all issues sorted out as I go
> along, until this one that randomly began last week.
>
> We are using Grandstream GXP 2000 Handsets in the office, and at TE110P
> card to interface to our ISDN OnRamp10 connection (10 Channels of PRI).
>
> The problem arising seems to happen roughly 4minutes into a call.
> Basically all of a sudden the caller just starts to no longer be understood
> (sounds like morse code, only milliseconds of voice packets getting through
> in either direction). naturally this could be a number of non-asterisk
> related things such as a carrier fault, bad network wiring (even more
> possible as we are using PoE), even badly configured QoS. However things
> being as they are my boss has taken it upon himself to absolve himself of
> any possible blame for any system that he manages (everything but the
> asterisk box) and lumped it all on me in such a way that its basically my
> job if i cannot get this working. With all of this, i need to do everything
> i can to rule out the Asterisk box, so i can go back to him with confidence
> and clear asterisk of any wrongdoing.
>
> Has anyone here ever heard of this sort of problem, and if so did you find
> a solution? If not, what steps would you recommend i take to diagnose the
> issue and rectify it as quickly as possible?
>
> Thankyou very much,
>
> Cameron Hissey
>

I have been there many times before as an integrator and feel for you.
People on this list will be glad to help.  I would not clear Asterisk of any
wrong doing just yet.  Post as much detail as to the server, switches, call
volume, applications used in Asterisk, VLANs, and whatever else you can
think of.

Try a different hard phone or even a softphone, check your firmware and see
if there are updates.  Run packet traces.

Switch servers, Asterisk versions, segregate voice data from other data,
aggregate links between switches if possible.  Try to identify trends, is it
always four minutes on every phone or just sometimes or some users.  Use the
monitor app to see if the recordings are also choppy.

Call Digium and call the telco, tell them both to fix it.

Actually I would start with the telco and Digium first.  Then start to
troubleshoot making one change at a time and testing.

Thanks,
Steve Totaro
-------------- next part --------------
An HTML attachment was scrubbed...
URL: http://lists.digium.com/pipermail/asterisk-users/attachments/20080121/e277c2a1/attachment.htm