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Re: ISDN tip wanted

  • From: John L Lee
  • Date: Mon Nov 04 12:40:26 2002

Andre'

From your protocol decode:

Your unrestricted 64k Bchannel call connected on B1. It would appear that your network connection was ok. I would check the configuration on each end of the link
since your interface went to the up state. and after it went to up it had an invalid call refernce which indicates to me a software firmware driver /' app
issue.

In my expereince with several hundred ISDN BRIs and PRIs from almost every US RBOC / ILEC they will misconfigure the BRI but then you would
get a call reject incompatible and would not get a "good" connect.

My opinion is that the app driver is incompatible with current switch protocol and / or BRI device firmware.

What is the switch type and software level?

When you configure the interface in the past you could config it to go to 64k unrestricted and if that does not work it will downshift to 64k restricted. You can also configure
for 56k unrestricted also. If that were the issue you would see and incompatible network or network destination message and not get an end to end connect

John L. Lee

ISDN -- It suites Dennis's Needs (Dennis Hayes of Hayes Micrcomputer Products)


Andre Chapuis wrote:

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 Andr�

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
[email protected]
CCIE #6023
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