[Asterisk-Users] drop calls with T100P / PRI

[C. Maj]

On Sat, 10 Jan 2004, Steven Critchfield waxed:

> On Sat, 2004-01-10 at 15:19, John Brown (CV) wrote:
> > busydetect=yes
> > callprogress=yes
> > musiconhold=default
> > signalling=pri_cpe
> > group=1
> > channel=> 1-4
> 
> Well seems you haven't been on the list, or maybe you haven't been
> paying attention since we have been covering that problem for a while
> lately. PRI has busydetect and callprogress built into the D channel and
> is absolutely known. Those 2 options are for analog links where the
> signaling is not always accurate. 

Easy, now.  I just added another T1, and I have noticed the
D-Channel dropping for a few seconds then coming right back,
fortunately in the wee hours when no one's on the lines.
But I have both busydetect and callprogress off, with a T400
tho not a T100.

Here's some zaptel.conf:

span=1,0,0,esf,b8zs
span=2,0,0,esf,b8zs
span=3,1,0,esf,b8zs
span=4,0,0,esf,b8zs

First 2 spans are channel banks, span 3 is local T1, and
span 4 is long distance T1.  The D-Channel only appears to
drop on span 4, although I can't yet get the time to play
wire/card-swap much due to the machine being in production.
Both T1's are from the same switch, so I'm told, so it
should be the same clock.

Here's some log:

Jan  9 04:22:05 WARNING[5126]: File chan_zap.c, Line 5759 (zt_pri_error): PRI: Read on 106 failed: Unknown error 500
Jan  9 04:22:05 WARNING[6151]: File chan_zap.c, Line 4708 (handle_init_event): Detected alarm on channel 73: Red Alarm
Jan  9 04:22:05 WARNING[6151]: File chan_zap.c, Line 1101 (zt_disable_ec): Unable to disable echo cancellation on channel 73
Jan  9 04:22:05 WARNING[6151]: File chan_zap.c, Line 4708 (handle_init_event): Detected alarm on channel 74: Red Alarm
Jan  9 04:22:05 WARNING[6151]: File chan_zap.c, Line 1101 (zt_disable_ec): Unable to disable echo cancellation on channel 74
    ...last 2 lines repeated for each channel on span 4 (up to channel 95) all at the same time
Jan  9 04:22:11 NOTICE[6151]: File chan_zap.c, Line 4703 (handle_init_event): Alarm cleared on channel 73
Jan  9 04:22:11 NOTICE[6151]: File chan_zap.c, Line 4703 (handle_init_event): Alarm cleared on channel 74
    ...again repeated at the same time for every channel on span 4
Jan  9 04:22:11 WARNING[5126]: File chan_zap.c, Line 5759 (zt_pri_error): PRI: Read on 106 failed: Unknown error 500
Jan  9 04:22:14 VERBOSE[5126]:   == D-Channel on span 4 down
Jan  9 04:22:20 VERBOSE[5126]:   == D-Channel on span 4 up
    ...and then the B-Channels start coming back up

I'm trying to blame it on the mobo and the telco, but now
that someone else is seeing it, maybe it's * ?  It wasn't a
problem when I had one T1, and span 3 doesn't seem to ever
drop, so maybe it's something with the span 4 port on the
T400 card ?  Or is this some side-effect of the known
buffering problem ?

--Chris


-- 

Chris Maj <cmaj_hat_freedomcorpse_hot_info>
Pronunciation Guide:  Maj == May
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