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877 ADSL connection issue

Hi,

Problem summary: ADSL router fails to bring up BT ADSL connection

We have set up a 877 ADSL router (UK ADSL POTS) and receive the following debug information following a 'debug atm events'

Mar 1 00:24:03.027: DSL: Send ADSL_OPEN command.

*Mar 1 00:24:03.027: DSL(ATM0): Using subfunction 0x0

*Mar 1 00:24:03.027: LOCAL:Max noise margin for power cutoff 31

*Mar 1 00:24:03.027: DSL(ATM0): Sent command 0x3

*Mar 1 00:24:05.527: DSL(ATM0): 1: Modem state = 0x9

*Mar 1 00:24:08.027: DSL(ATM0): 2: Modem state = 0x10

*Mar 1 00:24:10.527: DSL(ATM0): 3: Modem state = 0x10

*Mar 1 00:24:13.027: DSL(ATM0): 4: Modem state = 0x10

*Mar 1 00:24:14.115: DSL: Received response: 0x22

*Mar 1 00:24:14.115: DSL: Open failed: Error in early non-CRC message or in fir

st CRC-covered message -- retrying

*Mar 1 00:24:14.115: sleep 5 seconds

*Mar 1 00:24:19.115: DSL: Send ADSL_OPEN command.

*Mar 1 00:24:19.115: DSL(ATM0): Using subfunction 0x0

*Mar 1 00:24:19.115: LOCAL:Max noise margin for power cutoff 31

*Mar 1 00:24:19.115: DSL(ATM0): Sent command 0x3

*Mar 1 00:24:21.615: DSL(ATM0): 1: Modem state = 0x9

*Mar 1 00:24:24.115: DSL(ATM0): 2: Modem state = 0x10

ATM interface Configuration

interface ATM0

description ** Connection to ISP via ADSL **

no ip address

no ip redirects

no ip unreachables

no ip proxy-arp

no ip route-cache cef

no ip route-cache

no ip mroute-cache

no atm ilmi-keepalive

pvc 0/38

encapsulation aal5mux ppp dialer

dialer pool-member 1

dsl operating-mode auto

We have tried the BT router/modem and all works fine

We have extensively searched the web for the 'open failed' error

Any help on this would be much appreciated.

3 REPLIES
VIP Purple

Re: 877 ADSL connection issue

Hello,

can you try and set the ´dsl operating-mode´to ansi-dmt ?

dsl operating-mode ansi-dmt

and see if that makes a difference ?

Regards,

GP

Super Bronze

Re: 877 ADSL connection issue

Hi All!

I'm also having some grief with an 877 (in the UK)... the most progress I've made so far is to go to this URL:

ftp://ftp.cisco.com/pub/access/800

Download the 3.0.10 ADSL firmware. Copy it to flash, and rename to this name exactly:

adsl_alc_20190.bin

This got mine trained up! Prior to this it appeared to be dead...

Now if it would just pass a few packets I'd be laughing.

Regards

Aaron

Please rate helpful posts...

Aaron Please remember to rate helpful posts to identify useful responses, and mark 'Answered' if appropriate!
Hall of Fame Super Gold

Re: 877 ADSL connection issue

Hi,

If you do "show atm pvc" do you see data passing ?

Are you positive about encapsulation used and relative configuration ?

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