Date: Thu, 3 Sep 1998 17:21:22 +0200 (CEST) From: hm@kts.org (Hellmuth Michaelis) To: leo@wau.mis.ah.nl (Leo Weppelman) Cc: freebsd-isdn@FreeBSD.ORG Subject: Re: called-back, rejects and auto hangup Message-ID: <m0zEbCM-00000GC@bert.kts.org> In-Reply-To: <19980903162118.27170@wau.mis.ah.nl> from Leo Weppelman at "Sep 3, 98 04:21:18 pm"
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Leo Weppelman wrote:
> > I think Gary said it already: the remote calls back almost immediately; long
> > before the local call to the remote is disconnected - this can be seen
> > from the traces you sent me in private mail.
>
> Can you tell me why you think this is the case?
To quote from your trace:
You call out to your company ... (Call Reference cr=0x08)
-- TE->NT - unit:0 - frame:000005 - time:02.09 21:19:40.17 - length:42 ---------
Dump:000 00 c5 00 00 ....
Q921: SAP=0 (Call Control), C, TEI=98, I-Frame: N(S) 0 N(R) 0 P 0
Q931: pd=Q.931/I.451, cr=0x08 (from origination), message=SETUP:
[sending complete]
[bearer capability:
cap=unrestricted digital information
std=CCITT
rate=64 kbit/s
mode=circuit]
[channel id: channel=B-1 (preferred)]
[calling party number: 0LOCAL (type=unknown, plan=ISDN)]
[called party number: 0REMOTE (type=unknown, plan=ISDN)]
...
It rings in your company
...
-- NT->TE - unit:0 - frame:000010 - time:02.09 21:19:44.46 - length:8 ----------
Dump:000 02 c5 02 02 ....
Q921: SAP=0 (Call Control), C, TEI=98, I-Frame: N(S) 1 N(R) 1 P 0
Dump:004 08 01 88 01 ....
Q931: pd=Q.931/I.451, cr=0x08 (from destination), message=ALERTING:
...
Your company calls back (Call Reference cr=0x06)
...
-- NT->TE - unit:0 - frame:000012 - time:02.09 21:19:46.48 - length:44 ---------
Dump:000 02 ff 03 ...
Q921: SAP=0 (Call Control), C, TEI=127, U-Frame: UI PF 0
Q931: pd=Q.931/I.451, cr=0x06 (from origination), message=SETUP:
[sending complete]
[bearer capability:
cap=unrestricted digital information
std=CCITT
rate=64 kbit/s
mode=circuit]
[channel id: channel=B-2 (exclusive)]
[calling party number: REMOTE (type=national, plan=ISDN,
presentation allowed, screening user provided: verified & passed)]
[called party number: LOCAL (type=national, plan=ISDN)]
[low layer compatibility: LEN=0x02, DATA=0x88 0x90 ]
...
You dont accept the call
The exchange tries again (Call Reference cr=0x07)
...
-- NT->TE - unit:0 - frame:000014 - time:02.09 21:19:54.45 - length:44 ---------
Dump:000 02 ff 03 ...
Q921: SAP=0 (Call Control), C, TEI=127, U-Frame: UI PF 0
Q931: pd=Q.931/I.451, cr=0x07 (from origination), message=SETUP:
[sending complete]
[bearer capability:
cap=unrestricted digital information
std=CCITT
rate=64 kbit/s
mode=circuit]
[channel id: channel=B-2 (exclusive)]
[calling party number: REMOTE (type=national, plan=ISDN,
presentation allowed, screening user provided: verified & passed)]
[called party number: LOCAL (type=national, plan=ISDN)]
[low layer compatibility: LEN=0x02, DATA=0x88 0x90 ]
...
and again and again and again.
The call to your company went out 21:19:40.17, now it is 21:21:12.28
almost 1 1/2 minutes (!!!!!!) after the setup with cr=0x08 comes the
disconnect for this call - that is ridiculous !!!
-- NT->TE - unit:0 - frame:000053 - time:02.09 21:21:12.28 - length:12 ---------
Dump:000 02 c5 04 02 ....
Q921: SAP=0 (Call Control), C, TEI=98, I-Frame: N(S) 2 N(R) 1 P 0
Dump:004 08 01 88 45 08 02 82 92 ...E....
Q931: pd=Q.931/I.451, cr=0x08 (from destination), message=DISCONNECT:
[cause: 18: No user responding (Q.850)
(location=public network serving local user, std=CCITT)]
This is strange. At least you see that your company is _immediately_ (!!!)
calling you back which is the primary cause of your problem. The other
problem is the remote end (or the exchange) which somehow delays the
disconnect message for 1 and a half minutes.
hellmuth
--
Hellmuth Michaelis hm@kts.org Hamburg, Europe
We all live in a yellow subroutine, yellow subroutine, yellow subroutine ...
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