RE: ISDN tip wanted

[Andre Chapuis <chapuis () ip-plus net>]

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
---------------------------------------------------------------------
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 
> 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 () 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
----------------------