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I saw the issue again on two customers.<br>
This time I used dahdi_tool to compare the CAS bits.<br>
On one customer, I have this on mfcr2 show channels:<br>
<br>
Tx CAS Rx CAS<br>
CLEAR BA 0x08<br>
IDLE IDLE<br>
IDLE 0x08<br>
<br>
For instance this time, I see 4 channels with Rx CAS 0x08 (3 Tx
IDLE, 1 Tx CLEAR BA).<br>
<br>
The CLEAR BA 0x8 shows Tx 1101 Rx 1001 on dahdi_tool, all other
channels show Tx 1001 Rx 1001 on dahdi_tool, including the IDLE 0x08
channels.<br>
It looks like this is a openr2 bug.<br>
My guess is this happens when the E1 span gets an alarm with active
calls, the active calls get this Rx CAS 0x08 indication.<br>
Anyhow, the workaround is a nightly module unload / module load on
chan_dahdi.so.<br>
<br>
Moises, if you have a patch, I will be very happy to test it, once
you provide it, I'll apply it overnight, and it should take me a
week to report back if it fixes the issue, or a few days if it
happens again.<br>
<br>
Regards,<br>
<br>
Marcelo Pacheco<br>
M2J Communications - Brazil<br>
<br>
On 01/10/12 20:42, Moises Silva wrote:
<blockquote
cite="mid:CAA4nhyCYxV51AGF4BaHkyjytpLUZoFbaMVU=i11ih+mdWUDfAQ@mail.gmail.com"
type="cite">
<div class="gmail_quote">On Tue, Jan 10, 2012 at 5:30 PM, Marcelo
Pacheco <span dir="ltr"><<a moz-do-not-send="true"
href="mailto:marcelo@m2j.com.br">marcelo@m2j.com.br</a>></span>
wrote:<br>
<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt
0.8ex; border-left: 1px solid rgb(204, 204, 204);
padding-left: 1ex;">
I have the following chan_dahdi.conf (asterisk 1.6.2.18 /
dahdi 2.3.0.1 / openR2 1.3.1):<br>
<br>
[channels]<br>
usecallerid=yes<br>
echocancel=no<br>
echocancelwhenbridged=no<br>
<br>
signalling=mfcr2<br>
mfcr2_variant=br<br>
mfcr2_forced_release=no<br>
mfcr2_get_ani_first=no<br>
mfcr2_category=national_subscriber<br>
mfcr2_allow_collect_calls=yes<br>
mfcr2_double_answer=no<br>
<br>
context=entrada<br>
group=1<br>
mfcr2_max_ani=14<br>
mfcr2_max_dnis=4<br>
channel => 1-15,17-21<br>
<br>
context=geral<br>
group=2<br>
mfcr2_max_ani=4<br>
mfcr2_max_dnis=16<br>
channel => 32-46,48-52<br>
<br>
And the following /etc/dahdi/system.conf<br>
<br>
span=1,1,0,cas,hdb3<br>
span=2,0,0,cas,hdb3<br>
span=3,0,0,esf,b8zs<br>
span=4,0,0,ccs,hdb3<br>
cas=1-15,17-21:1101<br>
cas=32-46,48-52:1101<br>
fxoks=63-86<br>
bchan=87-101,103-117<br>
dchan=102<br>
echocanceller=mg2,1-15,17-21,32-46,48-52,63-86<br>
loadzone = us<br>
defaultzone=us<br>
<br>
<br>
/etc/asterisk/chan_dahdi.conf (removed the comments to save
space)<br>
<br>
[channels]<br>
usecallerid=yes<br>
callwaiting=no<br>
usecallingpres=yes<br>
callwaitingcallerid=yes<br>
threewaycalling=yes<br>
transfer=yes<br>
canpark=yes<br>
cancallforward=yes<br>
callreturn=yes<br>
echocancel=yes<br>
echocancelwhenbridged=no<br>
<br>
group=1<br>
callgroup=1<br>
pickupgroup=1<br>
<br>
signalling=mfcr2<br>
mfcr2_variant=br<br>
mfcr2_forced_release=no<br>
mfcr2_get_ani_first=no<br>
mfcr2_category=national_subscriber<br>
mfcr2_max_ani=14<br>
mfcr2_max_dnis=4<br>
mfcr2_allow_collect_calls=yes<br>
context=entrada<br>
group=1<br>
channel => 1-15,17-21<br>
<br>
mfcr2_max_ani=8<br>
mfcr2_max_dnis=16<br>
context=geral<br>
group=2<br>
channel => 32-46,48-52<br>
<br>
<br>
switchtype=euroisdn<br>
signalling=pri_net<br>
group=4<br>
context=geral<br>
channel => 87-101,103-117<br>
<br>
<br>
Frequently, after we get an alarm and the alarm clears, some
or all channels are left with Rx CAS 0xC state.<br>
Reloading dahdi solves the issue, but it's extremely
undesirable since this condition might leave no channels or
very few channels in operable state for usage until restarting
dahdi (and restarting dahdi kills all active dahdi calls). I
just upgraded to OpenR2 1.3.2, but I saw nothing on the
ChangeLog that might fix this.<br>
<br>
</blockquote>
<div><br>
</div>
<div>If you can reproduce this reliably and are willing to test
a patch, I can write one.</div>
<div><br>
</div>
<div>Can you reproduce the issue easily by unplugging/plugging
the cable multiple times to generate alarms?</div>
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style="font-size: 8pt; line-height: 12px;
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