acceptable adsl attenuation for cisco 857

Unanswered Question
Jan 4th, 2009

I can't get cisco 857 sync with telstra bigpond adsl service. It won't get into the showtime status. Attached is the screen capture for debuging atm event. The attenuation is so high (61db) as I can tell. But it uses 2wire modem connected to the adsl service fine. If the attenuation cant be reduced because of the distance, is there a way to use cisco router?

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Giuseppe Larosa Mon, 01/05/2009 - 00:50

Hello Lydia,

or your router is facing an interoperability issue with the remote end OR the ADSL card in the router is not working properly.

If you have a web access to the 2wire modem you can try to read the attenuation for this device if is very different there are chances your router DSL interface is defective.

000692: *Dec 15 15:52:26.411 Sydney: DSL(ATM0): Received response: 0x16

000693: *Dec 15 15:52:26.411 Sydney: DSL(ATM0): Far End Chip Country Code 0xB5

000694: *Dec 15 15:52:26.411 Sydney: DSL: Far End Chip Vendor ID BDCM

000695: *Dec 15 15:52:26.411 Sydney: DSL: Far End Chip Vendor ID Specific 0x544D

000696: *Dec 15 15:52:26.411 Sydney: DSL: Far End ITU Vendor STD Number 0x0002

000697: *Dec 15 15:52:26.411 Sydney: DSL(ATM0): Sent command 0x32

000698: *Dec 15 15:52:26.415 Sydney: DSL(ATM0): Received response: 0x14

000699: *Dec 15 15:52:26.415 Sydney: DSL(ATM0): Near End Chip Country Code 0x0F

000700: *Dec 15 15:52:26.415 Sydney: DSL: Near End Chip Vendor ID STMI

000701: *Dec 15 15:52:26.415 Sydney: DSL: Near End Chip Vendor ID Specific 0x0000

000702: *Dec 15 15:52:26.419 Sydney: DSL: Near End ITU Vendor STD Number 0x0003

000703: *Dec 15 15:52:26.419 Sydney: DSL(ATM0): Sent extended command 0x5

000704: *Dec 15 15:52:26.423 Sydney: DSL(ATM0): Near End Modem Country Code 0xB5

000705: *Dec 15 15:52:26.423 Sydney: DSL: Near End Modem Vendor ID CSCO

I see you have 12.4(15)T7 version of IOS

000707: *Dec 15 15:52:26.423 Sydney: DSL: Near End Modem Version 12.4(15)T7

You could also try to update IOS image to a newer version in the hope a new firmaware version for the DSL card is installed.

go to 12.4(20)T or later.

Hope to help

Giuseppe

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