ISDN tip wanted

Fri Nov 1 10:48:20 UTC 2002

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
André
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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
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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 at ip-plus.net]
>Sent: Thursday, October 31, 2002 7:58 AM
>To: nanog at 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 
>André
>
>Oct 31 14:23:56.350 MET: ISDN BR0/0: RX <-  SETUP pd = 8  callref = 0x01
>Oct 31 14:23:56.350 MET:         Bearer Capability i = 0x8890
>Oct 31 14:23:56.350 MET:         Channel ID i = 0x89
>Oct 31 14:23:56.350 MET:         Signal i = 0x40 - Alerting on - pattern 0 
>Oct 31 14:23:56.350 MET:         Calling Party Number i = 0x1183, '<calling number removed>'
>Oct 31 14:23:56.354 MET:         Called Party Number i = 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 = 0x808B0B, '<calling number removed>', 0x800109800114800114800114
>Oct 31 14:23:56.358 MET: ISDN BR0/0: Incoming call id = 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 = 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 = 8  callref = 0x81
>Oct 31 14:23:56.362 MET:         Channel ID i = 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> 
>Oct 31 14:23:56.462 MET: ISDN BR0/0: RX <-  RELEASE_COMP pd = 8  callref = 0x01
>Oct 31 14:23:56.462 MET:         Cause i = 0x82D1 - Invalid call reference value 
>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 at ip-plus.net
>CCIE #6023
>----------------------

---------------------
Andre Chapuis
IP+ Engineering
Swisscom Ltd
Genfergasse 14
3050 Bern
+41 31 893 89 61
chapuis at ip-plus.net
CCIE #6023
----------------------