[asterisk-users] [OT] Mediatrix Euro ISDN hangup problem

Jean-Denis Girard jd.girard at sysnux.pf
Sun Feb 10 22:18:34 CST 2013

Hash: SHA1

Hi list,

I'm getting a strange problem with a Mediatrix 3631 Gateway connected to
the PSTN via an E1 PRI link configured for Euro ISDN signaling. The
Mediatrix sends incoming calls from the PSTN to an Asterisk server via
SIP: this works fine. But when the caller hangs up, the Mediatrix
doesn't send "Bye" to Asterisk, so the call is not finished immediately
from the Asterisk point of view: the delay is exactly 30 seconds.

The telco made a trace on the ISDN, hangup is sent immediately,
everything looks fine on their side.

Then we took a trace on the gateway (see attached file). Line 345, ISDN
"Disconnect" is received from the PSTN. According to the ISDN
specs (and a trace I made on an Asterisk server connected via an ISDN
card), I think the gateway should reply with a "Release", then the
network would reply with "Release complete". But the Mediatrix never
sends "Release". After 30 sec, the *network* sends "Release" (line 445),
then the Mediatrix immediately sends "Release complete" (line 448).
Then, the Mediatrix sends SIP / BYE (line 475), and Asterisk immediately
hangs up.

It seems to me that there is something wrong with the Mediatrix or am I
wrong? It could obviously be a mistake in my configuration, but I could
not find what is wrong. Has anyone successfully used a 3631 with Euro ISDN?

- -- 
Jean-Denis Girard

SysNux                  Systèmes  Linux  en Polynésie française
http://www.sysnux.pf/   Tél: +689 50 10 40 / GSM: +689 79 75 27

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