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837 versus ADSL WIC performance

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eurobadger

eurobadger

Technical User
Jul 1, 2002
317
GB
Hi

Has anyone out there got any experience of comparing 837 ADSL perfremance/stability with a router that uses a WIC-1ADSL card, such as a 1721? I have an issue where multiple 837s seem to lose the line as signal-to-noise ratio increases, but a 1721 on the same line seems to be stable.

Is there an IOS issue here, or possibly a config chnage to allow for a noisy line?

Thanks
 
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Cisco embed the ADSL firmware in the IOS release - see here for IOS and what ADSL firmware is included:


You can also download firmware for the ADSL modem. Have a look here:

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

Read the documents first as the ADSL firmware are specific for a module or router with integrated ADSL modem.

Andy
 
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I had an 837, and now I have a 2620XM with a WIC-1ADSL. I had the connection drop 2 or 3 times total with the 837 (had it about 8 months), but no noise problems whatsoever. I have not had one single problem with the 2620XM and the WIC-1ADSL (In 4 months or so).

Burt
 
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I have an 877 with the latest IOS - 12.4(15)T1. I had some issues where it would retrain every so often. I installed the latest firmware for the Alcatel 20190 ADSL modem (AMR-3.0.033.bin) and it trained up at 7648Kbps and hasn't dropped out since.
The release notes don't say anything about retrains, however this new firmware has made it much more stable.

Andy
 
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Have you seen any bug reports specific to your issue Andy? I know you said that the release notes did not, assuming you mean for the actual firmware upgrade, but what about bug reports?

Burt
 
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To be honest Burt I didn't look. The installation notes state:{quote]CSCsf11228: 85x/87x/180x ping delay is higher, than with an external modem
CSCse94912: 1801 does not train at ADSL2+ rates to Alcatel 7302[/quote]
Since it is working perfectly I have just left it alone....

Andy
 
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