[asterisk-ss7] "SS7 requester: No idle circuit available." after 2days of load

[Pawel Ratajewski (Forweb)]

Hi,

I'm using sangoma card A102 (double E1) - asterisk 1.2.24 and zaptel 1.2.20 
with chan_ss7 0.9 and wanpipe-2.3.4-13 and since 6 months I have no problem 
with this box.

Pozdrawiam / Regards

Pawel Ratajewski
VoIP Administrator
Dzial Uslug Glosowych
pawel.ratajewski at 4web.pl

-----------------------------------------------
Forweb S.C.
Lagiewnicka 54/56, 91-463 Lódz
tel: +48 42 235 10 00, fax: +48 42 235 10 01
biuro at 4web.pl  http://www.4web.pl
-----------------------------------------------
----- Original Message ----- 
From: "Antoine Megalla" <aatef at rocketmail.com>
To: <asterisk-ss7 at lists.digium.com>
Sent: Monday, November 12, 2007 5:48 PM
Subject: [asterisk-ss7] "SS7 requester: No idle circuit available." after 
2days of load


| Hi,
|
| I just got my SS7 link up last week, and started
| stress testing the link.
| I have SIP --> SS7 on an asterisk server with
| transcoding.
|
| I am using the latest Asterisk 1.2 on a dual Xeon
| machine:
| Asterisk 1.2.24
| Zaptel 1.2.20.1
| Chan_ss7 0.9
| Digium TE210P
|
| After just 3 days of testing the SS7 link on 1 E1 with
| an average of 20
| concurrent calls on the E1 (Max 25 calls), I have the
| following warnings:
| WARNING[27043] l4isup.c: SS7 requester: No idle
| circuit available.
| WARNING[27046] l4isup.c: No idle circuit found.
|
| The errors started scarce on the second day, and then
| they increase until
| they are repeated in almost 3 out of every 4 SS7 call
| attempts.
| The problem is that when the error message occurs,
| only 9 out of the 30
| Bchannels are busy, and 21 channels are idle.
| The only solution to stop these errors and get the SS7
| link working again is
| to restart Asterisk.
|
| I have read all the list postings on the subject (only
| 2 threads are talking
| about this problem), and there seems to be no solution
| to this specific bug.
| All I got is that this is unavoidable in both chan_ss7
| and libSS7 under
| heavy call volumes (suggesting a Zaptel bug).
|
| My questions are:
| How can I avoid this strange behavior?
| Is there a patch to either chan_ss7 or Zaptel to fix
| this problem?
| If I use Sangoma cards instead of Digium will this
| problem disappear?
|
| Your help is much appreciated,
|
| Antoine Megalla.
|
|
|
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