Date: Fri, 5 Jun 1998 09:40:23 +0200 (METDST) From: hm@hcs.de (Hellmuth Michaelis) To: hanche@math.ntnu.no (Harald Hanche-Olsen) Cc: freebsd-isdn@FreeBSD.ORG Subject: Re: idletime disconnect won't work Message-ID: <m0yhr6t-00006hC@hcswork.hcs.de> In-Reply-To: <19980604222304B.hanche@math.ntnu.no> from Harald Hanche-Olsen at "Jun 4, 98 10:23:04 pm"
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>From the keyboard of Harald Hanche-Olsen: > Haven't got a second machine, sorry... But I stopped isdnd and ran > isdntrace -b on my one machine, and this appeared: > > =========== isdntrace controller #0 =========== started Thu Jun 4 22:04:00 1998 > > -- NT->TE - unit:0 - frame:000001 - time:04.06 22:04:24.58 - length:8 ---------- > Dump:000 fe ff 03 0f 00 00 04 ff ........ > LAPD: SAP=63 (TEI-Management), C, TEI=127, Ri=0x0000, IdCheckReq, Ai=127 > > -- TE->NT - unit:0 - frame:000002 - time:04.06 22:04:24.58 - length:8 ---------- > Dump:000 fc ff 03 0f 4d 9c 05 83 ....M... > LAPD: SAP=63 (TEI-Management), C, TEI=127, Ri=0x9c4d, IdCheckResp, Ai=65 > > -- NT->TE - unit:0 - frame:000003 - time:04.06 22:04:56.79 - length:8 ---------- > Dump:000 fe ff 03 0f 00 00 04 ff ........ > LAPD: SAP=63 (TEI-Management), C, TEI=127, Ri=0x0000, IdCheckReq, Ai=127 > > -- TE->NT - unit:0 - frame:000004 - time:04.06 22:04:56.79 - length:8 ---------- > Dump:000 fc ff 03 0f d8 59 05 83 .....Y.. > LAPD: SAP=63 (TEI-Management), C, TEI=127, Ri=0x59d8, IdCheckResp, Ai=65 > > -- NT->TE - unit:0 - frame:000005 - time:04.06 22:05:29.01 - length:8 ---------- > Dump:000 fe ff 03 0f 00 00 04 ff ........ > LAPD: SAP=63 (TEI-Management), C, TEI=127, Ri=0x0000, IdCheckReq, Ai=127 > > -- TE->NT - unit:0 - frame:000006 - time:04.06 22:05:29.01 - length:8 ---------- > Dump:000 fc ff 03 0f 29 b6 05 83 ....)... > LAPD: SAP=63 (TEI-Management), C, TEI=127, Ri=0xb629, IdCheckResp, Ai=65 > > These messages came in groups of two, one IdCheckReq and one > IdCheckResp at the time, and always at the same time log messages like > showed above appeared. Seems like my NT box is chattering to my ISDN > telephone, asking for an identity and getting a response back, at > irregular intervals. Yes, i've seen this type of traces also from France. It seems that the exchange verifies that a device is still connected to the S0 bus by regularly "polling" it with TEI check requests. This is a legal inter- action between a device and an exchange. The PBX i'm connected to in the company i work for does this also but AFAIK the german Telekom exchanges don't do it. Anyway, in case you get CRC errors every time this messages are exchanged, i still suspect something is wrong with your local electrical ISDN setup, such as cabling and/or termination. hellmuth -- Hellmuth Michaelis Tel +49 40 559747-70 HCS Hanseatischer Computerservice GmbH Fax +49 40 559747-77 Oldesloer Strasse 97-99 Mail hm@hcs.de 22457 Hamburg WWW http://www.hcs.de To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-isdn" in the body of the message
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