[asterisk-ss7] Debugging Line Errors

[Robert Thomas]

Software echo cancellation enabled?

I have seen this problem and had to use HW echo cancellation module. After X
many calls the echo cancellation put high load on the system. ( Still was
under 1.0 ) but aparently it was affecting the low level HDLC driver.

On Sat, Jul 30, 2011 at 2:53 AM, Nyamul Hassan <nyamul at gmail.com> wrote:

> Hi,
>
> We are getting the following errors from time to time:
>
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> WARNING[32196]: app_dial.c:1328 wait_for_answer: Unable to write frametype:
> 2
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> WARNING[32261]: app_dial.c:1328 wait_for_answer: Unable to write frametype:
> 2
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Abort(6) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Abort(6) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Bad FCS(8) on span 1/0
> NOTICE[29077]: chan_dahdi.c:3312 my_handle_link_exception: SS7 got event:
> HDLC Abort(6) on span 1/0
> WARNING[32264]: app_dial.c:1328 wait_for_answer: Unable to write frametype:
> 2
>
>
> What I've read over this mailing list and elsewhere, it is mostly due to a
> hardware error.
>
> Is there a way to check the hardware errors?  Like, to see the line error,
> bit error, crc error of the E1 line?  That would help us in debugging
> transmission related issue.
>
> Regards
> HASSAN
>
>
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-- 
Robert
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