Hi,
I have a problem with connecting my ISDN BRI interfaces to Belgacom PSTN. Layer2 cannot be established.
Interface configuration
BRUSSELS#sh run int b0/2/0
Building configuration...
Current configuration : 127 bytes
!
interface BRI0/2/0
no ip address
isdn switch-type basic-net3
isdn incoming-voice voice
!
end
show isdn status
BRUSSELS# sh isdn status
Global ISDN Switchtype = basic-net3
ISDN BRI0/2/0 interface
dsl 8, interface ISDN Switchtype = basic-net3
Layer 1 Status:
ACTIVE
Layer 2 Status:
Layer 2 NOT Activated
Layer 3 Status:
0 Active Layer 3 Call(s)
Active dsl 8 CCBs = 0
The Free Channel Mask: 0x80000003
Total Allocated ISDN CCBs = 0
Q.921 debug (after bringing up the interface)
Jan 27 16:06:29.463 CET: %LINK-3-UPDOWN: Interface BRI0/2/0:1, changed state to down
Jan 27 16:06:29.463 CET: %LINK-3-UPDOWN: Interface BRI0/2/0:2, changed state to down
Jan 27 16:06:29.503 CET: ISDN BR0/2/0 Q921: User TX -> IDREQ ri=32829 ai=127
Jan 27 16:06:29.515 CET: %LINK-3-UPDOWN: Interface BRI0/2/0, changed state to up
Jan 27 16:06:31.499 CET: ISDN BR0/2/0 Q921: User TX -> IDREQ ri=33806 ai=127
Jan 27 16:06:32.450 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:33.470 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:33.498 CET: ISDN BR0/2/0 Q921: User TX -> IDREQ ri=50415 ai=127
Jan 27 16:06:34.566 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:35.666 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:36.966 CET: ISDN BR0/2/0 Q921: User RX <- DISCp sapi=0 tei=126
Jan 27 16:06:46.853 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:47.865 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:48.969 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:50.065 CET: ISDN BR0/2/0 Q921: User RX <- SABMEp sapi=0 tei=0
Jan 27 16:06:51.480 CET: ISDN BR0/2/0 Q921: User RX <- DISCp sapi=0 tei=126
Telco Switch does not answer to IDREQ message with IDASSN message.
Instead it sends SABME and DISC messages endlessly.
Q.921 debug (during a try to make a call)
BRUSSELS#isdn test call int b0/2/0 0048502737523
BRUSSELS#
Jan 27 16:11:12.277 CET: ISDN BR0/2/0 Q921: User TX -> IDREQ ri=28435 ai=127
Jan 27 16:11:14.273 CET: ISDN BR0/2/0 Q921: User TX -> IDREQ ri=24644 ai=127
Jan 27 16:11:16.272 CET: ISDN BR0/2/0 Q921: User TX -> IDREQ ri=25733 ai=127
Jan 27 16:11:18.272 CET: ISDN BR0/2/0 **ERROR**: host_disconnect_ack: Call rejected cause Temporary failure(0x29) call id 0x801A
I do not see an answer to IDREQ with IDASSN message as well
ISDN switch does not respond to the request for TEI neither when the interface is initialise nor when placing a call.
When I call the number assigned to my lines from my mobile I got busy signal, and I did not notice any activity at Q.921 layer.
Belgacom claims that from their side everything is ok.
It seems to me that IDREQ messages do not reach ISDN switch. Maybe the problem is caused by cables?
(However L1 is active and the switch sends Q.921 messages)
I connected the BRI interface to Siemens NT1 with a cable that I received with a router directly from Cisco.
Belgacom NT1 is Siemens STK-413 900 30.
Thanks in advance,
Ignac
