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Cisco 1841 DSL issues

Hello,

We have a Cisco 1841 DSL router in a remote office set up as a VPN back to out HQ.  It has become unrealable over the last few days and te ISP say the line is fine so it must be our router.  It has been running for years without issues.

I'm wondering if it is the firmware or modem version, but can you tell anything from this output as I don't uinderstange the noise margins?

show dsl interface atm 0/0/0

ATM0/0/0

Alcatel 20150 chipset information

                ATU-R (DS)                      ATU-C (US)

Modem Status:    Showtime (DMTDSL_SHOWTIME)

DSL Mode:        ITU G.992.1 (G.DMT) Annex A

ITU STD NUM:     0x01                            0x1

Vendor ID:       'ALCB'                          'GSPN'

Vendor Specific: 0x0000                          0x0008

Vendor Country:  0x00                            0xFF

Capacity Used:   98%                             110%

Noise Margin:    10.0 dB                         10.0 dB

Output Power:    20.0 dBm                        12.0 dBm

Attenuation:     46.0 dB                         27.5 dB

Defect Status:   None                            None

Last Fail Code:  None

Selftest Result: 0x00

Subfunction:     0x15

Interrupts:      2657 (0 spurious)

PHY Access Err:  0

Activations:     1

LED Status:      ON

LED On Time:     100

LED Off Time:    100

Init FW:         embedded

Operation FW:    embedded

SW Version:      3.8131

FW Version:      0x1A04

Show version

Compiled Wed 22-Aug-12 03:36 by prod_rel_team

ROM: System Bootstrap, Version 12.4(13r)T, RELEASE SOFTWARE (fc1)

1841 uptime is 25 minutes

System returned to ROM by power-on

System restarted at 10:56:11 utc Thu Feb 6 2014

System image file is "flash:c1841-advipservicesk9-mz.124-25g.bin"

show inventory

NAME: "chassis", DESCR: "1841 chassis"

PID: CISCO1841         , VID: V04 , SN: FCZ111020RF

NAME: "WIC/HWIC 0", DESCR: "WAN Interface Card - ATM (With ADSL module)"

PID: WIC-1ADSL=        , VID: 2.3, SN: FOC11056U1U

Thanks

2 REPLIES
VIP Purple

Cisco 1841 DSL issues

Hello

If you say nothing has changed on either side of this connection, So then looking at your post the unitization on the link seams its maxing out?

I dont know what the noise average should be maybe someone else be able to comment,but as I can see no defects are being reported also.

Do you having any crc error etc? .

Capacity Used:   98%                             110%

Noise Margin:    10.0 dB                         10.0 dB

Output Power:    20.0 dBm                        12.0 dBm

Attenuation:     46.0 dB                         27.5 dB

Defect Status:   None                            None

Please don't forget to rate any posts that have been helpful.

Thanks.

Please don't forget to rate any posts that have been helpful. Thanks.

Re: Cisco 1841 DSL issues

Hi Andy,

Try changing RJ11 and splitter as they tend to degrade overtime.

Ask your ISP for an onsite visit if still persists.


Sent from Cisco Technical Support iPhone App

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