It may be a telco provisioning issue. You need to debug isdn q931 on the other
side as well to see if it ever receives the call setup attempt. If it doesn't,
you'll need to arrange for the second call to call the other phone number on the
BRI or have the provisioning issue fixed.
Jason Young
CNS - Network Design, Anheuser-Busch
(314)577-4597
> -----Original Message-----
> From: Jim Warner [mailto:warner@cats.UCSC.EDU]
> Sent: Monday, August 20, 2001 8:38 AM
> To: cisco-nsp@puck.nether.net
> Cc: kashmir@cats.UCSC.EDU
> Subject: [nsp] 2nd BRI call problem
>
>
>
> Hello. We have 3 BRI interfaces on two routers named coast
> and summit.
> When trying to place a call from coast to summit, the first call
> completes, but when the second call is placed (to the same
> dialer string),
> I get a busy error message. I thought since there is an available B
> channel on that same BRI interface on summit, that the second
> B-channel
> should connect. For testing purposes, I had summit call
> coast, and this
> worked correctly, with both B-channels on coast connecting
> when the same
> dialer string was called.
>
> I am suspicious of the ISDN switches between both my routers which are
> PacBell and Verizon. Is there anything I can do to narrow
> down where the
> busy signal is coming from?
>
> Below you will find some debug output that contains the busy
> error and
> also the configuration of coast and summit.
>
> Thanks for the help,
>
>
> DEBUG:
> ------
> A call to string 1234 has already been completed on BRI1/0:1 and now a
> second call is attempted:
>
> Aug 15 23:04:14.229 UTC: BR1/0 DDR: rotor dialout [priority]
> Aug 15 23:04:14.229 UTC: BR1/0 DDR: Attempting to dial 1234
> Aug 15 23:04:14.229 UTC: ISDN BR1/0: Outgoing call id = 0x811A, dsl 8
> Aug 15 23:04:14.229 UTC: ISDN BR1/0: Event: Call to 1234 at 64 Kb/s
> Aug 15 23:04:14.229 UTC: ISDN BR1/0: process_bri_call(): call
> id 0x811A,
> called_number 1234, speed 64, call type DATA
> Aug 15 23:04:14.229 UTC: CC_CHAN_GetIdleChanbri: dsl 8
> Aug 15 23:04:14.233 UTC: Found idle channel B2
> Aug 15 23:04:14.233 UTC: ISDN BR1/0: TX -> SETUP pd = 8
> callref = 0x1C
> Aug 15 23:04:14.237 UTC: Bearer Capability i = 0x8890
> Aug 15 23:04:14.237 UTC: Channel ID i = 0x83
> Aug 15 23:04:14.237 UTC: Keypad Facility i = '1234'
> Aug 15 23:04:14.817 UTC: ISDN BR1/0: RX <- CALL_PROC pd = 8
> callref =
> 0x9C
> Aug 15 23:04:14.821 UTC: Channel ID i = 0x8A
> Aug 15 23:04:14.825 UTC: ISDN BR1/0: LIF_EVENT: ces/callid 2/0x811A
> HOST_PROCEEDING
> Aug 15 23:04:15.069 UTC: %LINEPROTO-5-UPDOWN: Line protocol
> on Interface
> BRI1/0:1, changed state to up
> Aug 15 23:04:16.597 UTC: ISDN BR1/0: RX <- DISCONNECT pd = 8
> callref =
> 0x9C
> Aug 15 23:04:16.597 UTC: Cause i = 0x8091 - User busy
> Aug 15 23:04:16.601 UTC: Signal i = 0x04 - Busy tone on
> Aug 15 23:04:16.609 UTC: ISDN BR1/0: LIF_EVENT: ces/callid 2/0x811A
> HOST_DISCONNECT
> Aug 15 23:04:16.609 UTC: ISDN BR1/0: Event: Call to 1234 was hung up.
>
> -------
> COAST:
> -------
> Cisco 2621, IOS (tm) C2600 Software (C2600-I-M), Version 12.1(2)T
> Basic Rate ISDN software, Version 1.1., 4 ISDN Basic Rate interface(s)
>
> !
> interface BRI1/0
> no ip address
> encapsulation ppp
> no ip mroute-cache
> dialer pool-member 1 priority 250
> isdn switch-type basic-ni
> isdn spid1
> isdn spid2
> no fair-queue
> !
> interface Dialer0
> ip unnumbered Tunnel0
> encapsulation ppp
> load-interval 30
> dialer remote-name summit
> dialer pool 1
> dialer idle-timeout 30
> dialer string 1234
> dialer string 5678
> dialer string 9012
> dialer load-threshold 1 either
> dialer max-call 6
> dialer-group 5
> no fair-queue
> ppp authentication chap
> ppp multilink
> !
> ------
> SUMMIT:
> ------
> Cisco 2621, IOS (tm) C2600 Software (C2600-I-M), Version 12.0(5)T1
> Basic Rate ISDN software, Version 1.1., 4 ISDN Basic Rate interface(s)
>
> !
> interface BRI1/0
> no ip address
> no ip directed-broadcast
> encapsulation ppp
> no ip mroute-cache
> dialer pool-member 1
> isdn switch-type basic-ni
> isdn spid1
> isdn spid2
> !
> interface Dialer0
> ip unnumbered Tunnel0
> no ip directed-broadcast
> encapsulation ppp
> dialer remote-name coast
> dialer pool 1
> dialer-group 5
> ppp authentication chap
> ppp multilink
> !
>
>
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