[53138] in North American Network Operators' Group
RE: ISDN tip wanted
daemon@ATHENA.MIT.EDU (Andre Chapuis)
Fri Nov 1 05:49:21 2002
Date: Fri, 01 Nov 2002 11:48:20 +0100
To: <nanog@nanog.org>
From: Andre Chapuis <chapuis@ip-plus.net>
In-Reply-To: <456A8AB66E0DD84E8208A7DDB2E2151703CAFFC4@excustx100.americ
as.unity>
Errors-To: owner-nanog-outgoing@merit.edu
Hi Eric/All,
Thanks for the various feedback. Actually the line is working now, although=
Verizon told me they did not change anything. They even told me the problem=
is: the line is not ISDN but POTS ....
Anyway it's working and it reminds me the joke below
Have a nice WE
Andr=E9
---------------------------------------------------------------------
Theory: Nothing is working but everybody knows why
Practice: Everything is working but nobody knows why
Here we combine both: Nothing is working and nobody knows why
---------------------------------------------------------------------
At 10:18 31.10.2002 -0600, Knudson, Eric wrote:
>Andre,
>
>The call is being disconnected from the local switch because of an 'Invalid=
call reference value.' This would be the callref field in the various q931=
messages. As you can see, the switch references this as '0x01,' while the=
router references it as '0x81.' It involves flipping a bit when we=
reference the same call that changes the value by 8 in hex. From the=
debugs, it looks like the router is doing the right thing, but the switch=
doesn't like the value. I'd ask the Verizon switch tech to identify what's=
wrong with that callref, or put your know good router onto this circuit to=
see if it exhibits the same behavior.
>
>Eric
>
>
>-----Original Message-----
>From: Andre Chapuis [mailto:chapuis@ip-plus.net]
>Sent: Thursday, October 31, 2002 7:58 AM
>To: nanog@nanog.org
>Subject: ISDN tip wanted
>
>
>
>Hi,
>I'm trying to establish an ISDN call between Switzerland and New-York. The=
destination is in New-York, ISDN line provided by Verizon. The called is=
disconnected just after being set up (see NY-router log below), and the=
problem seems to be that Verizon switch does not understand the callref=
flag (0x01 and 0x81) correctly.
>
>The funny thing is that i have another router in NY, another ISDN line from=
Verizon, and i'm calling from the same number in CH and it works=
perfectly...
>
>Does anyone have a hint for me ?
>Thanks=20
>Andr=E9
>
>Oct 31 14:23:56.350 MET: ISDN BR0/0: RX <- SETUP pd =3D 8 callref =3D=
0x01
>Oct 31 14:23:56.350 MET: Bearer Capability i =3D 0x8890
>Oct 31 14:23:56.350 MET: Channel ID i =3D 0x89
>Oct 31 14:23:56.350 MET: Signal i =3D 0x40 - Alerting on - pattern=
0=20
>Oct 31 14:23:56.350 MET: Calling Party Number i =3D 0x1183,=
'<calling number removed>'
>Oct 31 14:23:56.354 MET: Called Party Number i =3D 0xC1, '<called=
number removed>'
>Oct 31 14:23:56.354 MET: Locking Shift to Codeset 5
>Oct 31 14:23:56.354 MET: Codeset 5 IE 0x2A i =3D 0x808B0B,=
'<calling number removed>', 0x800109800114800114800114
>Oct 31 14:23:56.358 MET: ISDN BR0/0: Incoming call id =3D 0x9E, dsl 0
>Oct 31 14:23:56.358 MET: ISDN BR0/0: received HOST_INCOMING_CALL call_id=
0x9E
>Oct 31 14:23:56.358 MET: ISDN BR0/0: HOST_INCOMING_CALL: voice_answer_data=
=3D FALSE
>Oct 31 14:23:56.358 MET: ISDN BR0/0: Event: Received a DATA call from=
<calling number removed> on B1 at 64 Kb/s
>Oct 31 14:23:56.358 MET: ISDN BR0/0: RM returned call_type 0 resource type=
0
>Oct 31 14:23:56.362 MET: ISDN BR0/0: TX -> CALL_PROC pd =3D 8 callref =3D=
0x81
>Oct 31 14:23:56.362 MET: Channel ID i =3D 0x89
>Oct 31 14:23:56.362 MET: ISDN BR0/0: isdn_send_connect(): msg 4, call id=
0x9E, ces 1 bchan 0, call type DATA
>Oct 31 14:23:56.366 MET: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state=
to up
>Oct 31 14:23:56.370 MET: %ISDN-6-CONNECT: Interface BRI0/0:1 is now=
connected to <calling number removed>=20
>Oct 31 14:23:56.462 MET: ISDN BR0/0: RX <- RELEASE_COMP pd =3D 8 callref=
=3D 0x01
>Oct 31 14:23:56.462 MET: Cause i =3D 0x82D1 - Invalid call=
reference value=20
>Oct 31 14:23:56.466 MET: ISDN BR0/0: received HOST_DISCONNECT_ACK call_id=
0x9E
>Oct 31 14:23:56.466 MET: ISDN BR0/0: HOST_DISCONNECT_ACK: call type is DATA
>Oct 31 14:23:56.466 MET: %LINK-3-UPDOWN: Interface BRI0/0:1, changed state=
to down
>Oct 31 14:23:56.666 MET: CC: dsl 0 No CCB Src->HOST cid 0x9E, ev 0x4=
ces 1
>Oct 31 14:23:56.666 MET: ISDN BR0/0: received HOST_QUERY_RESPONSE call_id=
0x9E
>
>
>---------------------
>Andre Chapuis
>IP+ Engineering
>Swisscom Ltd
>Genfergasse 14
>3050 Bern
>+41 31 893 89 61
>chapuis@ip-plus.net
>CCIE #6023
>----------------------
---------------------
Andre Chapuis
IP+ Engineering
Swisscom Ltd
Genfergasse 14
3050 Bern
+41 31 893 89 61
chapuis@ip-plus.net
CCIE #6023
----------------------
