|Summary:||ASTERISK-11469: sending or receiving faxes thru ISDN will cause the system to slow down|
|Reporter:||Antonio Gallo (agx)||Labels:|
|Date Opened:||2008-02-19 05:25:27.000-0600||Date Closed:||2009-03-02 09:34:43.000-0600|
|Description:||When sending and receiving faxes from chan_misd using the following cards:|
- Digium 4 BRI
- Beronet 2 BRI or 4 BRI
thru a linksys PAP2T FXS connected to a fax machine the entire system collapse and CPU reach high value this is because when the call is active a message is generated for every ISDN packet (i suppose) that flood the asterisk and system log and also causes high disk activity.
To avoid it i temporary commented out the offending line in channel mISDN directory and this worked as temporary fix.
Perhaps some people from chan_misdn DEV team can watch what causes this problem.
****** ADDITIONAL INFORMATION ******
--- isdn_lib.c.ORI 2008-02-19 12:24:19.000000000 +0100
+++ isdn_lib.c 2008-02-19 12:23:44.000000000 +0100
@@ -3616,7 +3616,7 @@
return 0 ;
- cb_log(0, 0, "Unhandled Message: prim %x len %d from addr %x, dinfo %x on this port.\n",frm->prim, frm->len, frm->addr, frm->dinfo);
+// cb_log(0, 0, "Unhandled Message: prim %x len %d from addr %x, dinfo %x on this port.\n",frm->prim, frm->len, frm->addr, frm->dinfo);
|Comments:||By: Matteo Piscitelli (picciux) 2008-05-13 04:57:27|
only a suggestion: if you're using 'n' option, in mISDN dial string (when sending through mISDN) or in 'misdn_set_opt' (when receiving from mISDN), try removing it, and you should see the problem disappear.
Beside of this, don't know if there's a bug in mISDN or this is expected behaviour.
By: Richard Mudgett (rmudgett) 2009-02-27 15:13:09.000-0600
Asterisk 1.4 SVN -r119585 added a change to reduce the amount of unhandled B channel messages by a factor of 1000. This change first went into Asterisk 1.4.21.
The new message reported in this case is:
"received 1k Unhandled Bchannel Messages: prim %x len %d from addr %x, dinfo %x on this port.\n"
Did this change help the issue?
By: Antonio Gallo (agx) 2009-02-28 02:41:10.000-0600
Yes, with 126.96.36.199 the spam has gone away and so the slowness.
By: Richard Mudgett (rmudgett) 2009-03-02 09:34:42.000-0600
Closing because a previous change resolved the issue. (-r119585 that first went into Asterisk 1.4.21)