Cisco 827, no cd

Unanswered Question
Jul 28th, 2007

When I connect the adsl cable, the CD led gives no signal.

The RX/TX led's are flashing very fast.

When I do a 'debug atm events', I get :

Router#debug atm events

ATM events debugging is on


00:18:53: DSL: 20: Modem state = 0x8

00:18:56: DSL: Could not establish connection

00:18:59: DSL: Trying to bring up DSL line using Embedded firmware version : 3.9


00:18:59: DSL: Send ADSL_OPEN command.

00:18:59: DSL: Using subfunction 0x2

00:18:59: DSL: Using subfunction 0x2

00:18:59: LOCAL:Max noise margin for power cutoff 31

00:18:59: DSL: Sent command 0x3

00:19:02: DSL: 1: Modem state = 0x8

00:19:04: DSL: 2: Modem state = 0x8

00:19:07: DSL: 3: Modem state = 0x8

00:19:09: DSL: 4: Modem state = 0x8

00:19:12: DSL: 5: Modem state = 0x8

00:19:14: DSL: 6: Modem state = 0x8

And the ATM interface is down.

No administrative down, but just down.

I can't get it up.

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nikolay-shopik Sat, 07/28/2007 - 04:32

And I can tell you w/o looking in debug if you have no CD link you should check wire and RJ connector. It's like don't hear dial tone if you pickup your phone, physical problem.

mathieuallaert Sun, 07/29/2007 - 02:51

Hi, thanks for you're response.

But I have already checked the cable + swichted of cable.

Is it normal that the RXD/TXD leds are flashing the whole time ?

The cisco faq says :



Blinks when an ADSL port sends data.

But my router is not connected yet to adsl. (Stil no CD)

Paolo Bevilacqua Sun, 07/29/2007 - 03:06

Does another adsl modem works when connected to the same line? Which IOS do you have on the 827 ?

mathieuallaert Sun, 07/29/2007 - 03:09

I tested the line with a thomson speedtouch 510 and a Linksys wag54g without promblems.

My ios version is Version 12.4(13b)

Bootstarp vrsion : 12.2(11r)YV6

mathieuallaert Sun, 07/29/2007 - 05:20


I have tried to set "dsl operating-mode itu-dmt" first, but it didn't work. There is no change

I can't update to another version, i haven't such a account.

And the dsl commands that i tried where not recognized by the router

mathieuallaert Sun, 07/29/2007 - 05:44

I found the real problem.

I have a wrong adapter !

Can I order on the cisco site a correct one ?

Paolo Bevilacqua Sun, 07/29/2007 - 06:37

What adapter are you talking about ?

You cannot order directly from cisco. What is that you need, chances are you can get it on the leading auctions website.

mathieuallaert Sun, 07/29/2007 - 07:41


No it's the 827 model. Without the 4-ports hub.

Just Console - Ethernet - ADSL - Power

Paolo Bevilacqua Sun, 07/29/2007 - 08:00

Then it's missing more voltages than just 12V !

It may be difficult to find an original PS. Perhaps you can use an "additional external one" just for the +/- 12V. You don't need the -24 and -71 that are for loop current and ring generation on the telephone ports of the 827-4V.


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