Dial in interface won't reset

[Tbarney]

HI all, MR. Nuby here...
I have an 805 that dials into a 1602. I can connect and transfer data fine, but when I disconnect, due to uninteresting traffic (not that it was that interesting in the first place) I cannot redial that connection. The modem on the 1602 answers and then hangs right up without a carrier or any handshaking/negotiating. Here is a small capture from the debug on the 1602 after the first call, when the hardware should be getting itself ready for another call.

00:13:33: Se1 LCP: TIMEout: State REQsent
00:13:33: Se1 LCP: O CONFREQ [REQsent] id 12 len 25
00:13:33: Se1 LCP: ACCM 0x000A0000 (0x0206000A0000)
00:13:33: Se1 LCP: AuthProto CHAP (0x0305C22305)
00:13:33: Se1 LCP: MagicNumber 0x02C581F3 (0x050602C581F3)
00:13:33: Se1 LCP: PFC (0x0702)
00:13:33: Se1 LCP: ACFC (0x0802)
00:13:33: Se1 LEX: LCP not open, discarding packet
00:13:33: Se1 UNKNOWN(0x000D): LCP not open, discarding packet
00:13:33: Se1 LCP: I CONFREQ [REQsent] id 12 len 25
00:13:33: Se1 LCP: ACCM 0x000A0000 (0x0206000A0000)
00:13:33: Se1 LCP: AuthProto CHAP (0x0305C22305)
00:13:33: Se1 LCP: MagicNumber 0x02C581F3 (0x050602C581F3)
00:13:33: Se1 LCP: PFC (0x0702)
00:13:33: Se1 LCP: ACFC (0x0802)
00:13:33: Se1 LCP: O CONFNAK [REQsent] id 12 len 10
00:13:33: Se1 LCP: MagicNumber 0x02C588F4 (0x050602C588F4)
00:13:34: Se1 LCP: I CONFNAK [REQsent] id 12 len 10
00:13:34: Se1 LCP: MagicNumber 0x02C588F4 (0x050602C588F4)
00:13:34: Se1 PPP: Line appears to be looped back
00:13:34: Se1 UNKNOWN(0x000D): LCP not open, discarding packet

I can include configs, but since it was ok on the first call I though it may not be needed here.
If I reboot the router I can once again make a connection. But that is not a real world option.
Thanks for any help!

Tom

 

[munsonbrown]

If PPP negotiations are not occuring, what I would do is 1st turn on msec timestamps. Then I would do a 'debug isdn q931' on each end and look for "DISCONNECT" or "Call Rejected". Somewhere there about you'll see a "Cause i =0xXXXXXX". Here is a link to read the disconnect cause codes.

http://www.cisco.com/warp/public/129/isdn_disc_code.html

Hope that sheds some light.

 

[Tbarney]

I apologize. I failed to tell everyone that this is a pots line, not ISDN. But thanks for that tip anyway, it seems quite interesting and I hope someone else can use it. Here are some caps after I put some modem debugs in there. This is after the call is disconnected, when the modem should be resetting itself to take another call.

23:58:03: Se1 LEX: LCP not open, discarding packet
23:58:04: Se1 UNKNOWN(0x000D): LCP not open, discarding packet
23:58:04: TTY2: detection speed (300) response ---L@ \ @/.by0@+---
23:58:04: TTY2: Failed to redetect modem after locking speed
23:58:05: Se1 LCP: TIMEout: State REQsent
23:58:05: TTY2: Async Int reset: Dropping DTR
23:58:05: Se1 LCP: State is Listen
23:58:05: TTY2: cleanup pending. Delaying DTR
23:58:06: TTY2: cleanup pending. Delaying DTR
23:58:07: %LINK-5-CHANGED: Interface Serial1, changed state to reset
23:58:07: %DIALER-6-UNBIND: Interface Se1 unbound from profile Di1
23:58:07: Se1 LCP: State is Closed
23:58:07: Se1 PPP: Phase is DOWN
23:58:07: TTY2: cleanup pending. Delaying DTR
23:58:08: TTY2: cleanup pending. Delaying DTR
23:58:09: TTY2: cleanup pending. Delaying DTR
23:58:10: TTY2: destroy timer type 0
23:58:10: TTY2: destroy timer type 1
23:58:10: TTY2: destroy timer type 3
23:58:10: TTY2: destroy timer type 4
23:58:10: TTY2: destroy timer type 2
23:58:10: Serial1: allowing modem_process to continue hangup
23:58:10: TTY2: autoconfigure probe started
23:58:11: TTY2: detection speed (115200) response ---OK---
23:58:11: TTY2: Modem command: --AT&F&C1&D2&H1&R2&M4&K1&B1S0=1H0--
23:58:11: TTY2: Modem configuration succeeded
23:58:12: %LINK-3-UPDOWN: Interface Serial1, changed state to down
23:58:12: Se1 LCP: State is Closed
23:58:12: Se1 PPP: Phase is DOWN
23:58:12: TTY2: destroy timer type 1
23:58:12: TTY2: destroy timer type 0
23:58:12: Se1 UNKNOWN(0x000D): LCP not open, discarding packet
23:58:14: %LINK-3-UPDOWN: Interface Serial1, changed state to up
23:58:14: %DIALER-6-BIND: Interface Se1 bound to profile Di1
23:58:14: Se1 PPP: Treating connection as a callin
23:58:14: Se1 PPP: Phase is ESTABLISHING, Passive Open
23:58:14: Se1 LCP: State is Listen
23:58:14: Se1 LEX: LCP not open, discarding packet
23:58:14: Se1 UNKNOWN(0x000D): LCP not open, discarding packet