ISDN backup ADSL on CISCO 1801

We try to use the CISCO 1801 with ISDN as backup of the ADSL connection on the same router.

With 2 differentes IOS version we find the following problem :

12.3 (14)YT1 ADSL work but ISDN not working 12.3(8)YT1 ISDN working and ADSL no

Here a debug of version 12.3 (14)YT1 where ADSL work and ISDN no

#debug isdn events

#isdn test call interface bri 0 092921500

*Oct 10 12:04:26.042: ISDN BR0 EVENT: UserIdle: callid 0x8024 received ISDN_CALL (0x0)

*Oct 10 12:04:26.042: ISDN BR0 EVENTd: UserIdle: Call to 092921500 at

64 Kb/s

*Oct 10 12:04:26.042: ISDN BR0 EVENTd: isdn_get_guid: Got Guid D640B9538025

*Oct 10 12:04:26.042: ISDN BR0 EVENT: process_bri_call: call id 0x8024, called_n

umber 092921500, Guid D640B9538025 speed 64, call type DATA, bchan -1 clng_num n

one

*Oct 10 12:04:26.042: ISDN BR0 EVENTd: process_bri_call: No name in GTD

*Oct 10 12:04:26.042: ISDN BR0 SERROR: isdn_get_display_text_from_gtd: false ret

*Oct 10 12:04:26.042: ISDN BR0 SERROR: isdn_get_mlpp_from_gtd: MLPP from GTD failed

*Oct 10 12:04:26.042: ISDN BR0 EVENTd: calltrkr_setup_received: isdn_info=3D220691

2444l, call_id=3D0x8024 ORIGINATE

*Oct 10 12:04:26.042: ISDN BR0 EVENTd: calltrkr_setup_received: calltracker disa

bled

*Oct 10 12:04:34.042: ISDN EVENTd: cc_clear_free_list freed 0x83C5BDA4

*Oct 10 12:04:34.042: ISDN BR0 EVENT: process_rxstate: ces/callid

1/0x8024 callt

ype 1 HOST_DISCONNECT_ACK

*Oct 10 12:04:34.042: ISDN BR0 EVENTd: calltrkr_call_cleared: isdn_info=3D0x838ACF

BC, call_id=3D0x8024

*Oct 10 12:04:34.042: ISDN BR0 EVENTd: calltrkr_call_cleared: hndl=3D0l, cause=3D0,

Unknown cause value

*Oct 10 12:04:34.042: ISDN BR0 **ERROR**: host_disconnect_ack: Unfound B-channel

on Disconnect_Ack call id 0x8024

Par contre dans la version 12.3(8)YT1, l'interface ISDN fonnctionne parfaitement. Le m=EAme debug donne le r=E9sultat suivant :

*Oct 10 12:01:50.087: ISDN BR0 EVENT: UserIdle: callid 0x8005 received ISDN_CALL (0x0)

*Oct 10 12:01:50.087: ISDN BR0 EVENT: process_bri_call: call id 0x8005, called_n

umber 092921500, Guid BR0 speed 64, call type DATA, bchan -1 clng_num none

*Oct 10 12:01:50.103: %ISDN-6-LAYER2UP: Layer 2 for Interface BR0, TEI 65 change

d to up

*Oct 10 12:01:50.307: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x8005 callt

ype 1 HOST_PROCEEDING

*Oct 10 12:01:50.911: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x8005 callt

ype 1 HOST_CONNECT

*Oct 10 12:01:50.911: %LINK-3-UPDOWN: Interface BRI0:1, changed state to up

*Oct 10 12:01:51.911: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, ch

anged state to up

*Oct 10 12:01:56.911: %ISDN-6-CONNECT: Interface BRI0:1 is now connected to 0929

21500 unknown

*Oct 10 12:02:00.863: ISDN BR0 EVENT: process_rxstate: ces/callid 1/0x8005 callt

ype 1 HOST_DISCONNECT

*Oct 10 12:02:00.863: %ISDN-6-DISCONNECT: Interface BRI0:1 disconnected from 09

2921500 , call lasted 9 seconds

*Oct 10 12:02:00.863: %LINK-3-UPDOWN: Interface BRI0:1, changed state to down

*Oct 10 12:02:00.939: ISDN BR0 EVENT: process_rxstate: ces/callid

1/0x8005 callt

ype 1 HOST_DISCONNECT_ACK

*Oct 10 12:02:01.863: %LINEPROTO-5-UPDOWN: Line protocol on Interface BRI0:1, ch

anged state to down

Any help