Topic '[HELP] How to read dsl interface' in forum 'Cisco' - dslreports.com

Re: [HELP] How to read dsl interface

Tue, 08 Jan 2008 01:00:42 EDT

LCPTeck posted : Yep, it's a Cisco 877, however, can't remember the IOS version though...

Thanks all for your contributions!

Re: [HELP] How to read dsl interface

Wed, 14 Nov 2007 09:24:06 EDT

aryoba posted : What I usually do is to get cheaper (read: lower-end model) router that has integrated ADSL modem and keep using the existing higher-end model router; instead of replacing the existing higher-end model just because it does not support the newer WIC.

The downside is that there is this "latency factor" on the lower-end router which makes the existing higher-end model router performance not maximized.

Well, there is always trade off between choices .... :D

Re: [HELP] How to read dsl interface

Tue, 13 Nov 2007 13:09:13 EDT

rolande posted : Yep. Same Alcatel 20190 chipset across all of those newer devices. That sucks but it makes sense. They need the higher speed interface of the HWIC to support the higher ADSL2+ speeds anyway.

Now I am going to have to look at getting a 2800 series ISR router and an HWIC ADSL module...not that I really feel like dropping over $1000 on more hardware. Nothing like 1 module to obsolete a whole set of platforms :p
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Re: [HELP] How to read dsl interface

Tue, 13 Nov 2007 11:35:49 EDT

Phraxos posted :

said by TomS_:

He did say it was an 877. :D

You don't really expect me to read what other people write? :p But thanks for confirming that I was right ;)

Re: [HELP] How to read dsl interface

Tue, 13 Nov 2007 03:03:17 EDT

TomS_ posted : He did say it was an 877. :D

Otherwise, it'd be either of these:

* 857
* 1801
* HWIC-1ADSL

Re: [HELP] How to read dsl interface

Mon, 12 Nov 2007 17:51:37 EDT

Phraxos posted : Could be one of the newer integrated routers (877, 1801 - can't be bothered to dig one out and power it on ;)) or an HWIC-1ADSL which is the 'upgrade' of the WIC-1ADSL.

Re: [HELP] How to read dsl interface

Mon, 12 Nov 2007 13:55:34 EDT

rolande posted : Is that just a newer version of the WIC-1ADSL module or which WIC module is it? I only have the Alcatel 20150 chipset on mine and it does not display the same DSL mode as yours. My older module chipset is not capable of ADSL2+. Just curious if it is still called the WIC-1ADSL or if it is labeled v2 or something like that to indicate the newer chipset and capabilities. I just looked on Cisco's site and I am not finding any information on a DSL module that uses the Alcatel 20190 chipset. They only list the older chipsets. :huh:
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Re: [HELP] How to read dsl interface

Mon, 12 Nov 2007 02:52:53 EDT

TomS_ posted : Of notable interest, the information you are likely to ever really need is as follows:


Modem Status:    Showtime (DMTDSL_SHOWTIME)
DSL Mode:        ITU G.992.5 (ADSL2+) Annex A

Showtime indicates the modem is in sync.

DSL mode indicates the transmission mode you are synced with. In your case, ADSL2+ Annex A (allowing upto 24mbit downstream and 1mbit upstream maximum under ideal conditions - for round figures).


Noise Margin:    15.0 dB                         18.5 dB
Attenuation:     26.0 dB                          8.0 dB

Noise margin is important. The higher the noise margin, the stronger the ADSL signal is compared to noise on the line. 15 and 18 are good values indicating that your signal is very strong, and/or there is very little noise.

Attenuation is signal strength lost over the line, not due to interference from noise etc. The lower the better, but it is dependant on the length of your line and other factors. There is generally not much you can do to lower attenuation, but you can help by having good wiring in your house/premesis, and keeping extension cable lengths to a minimum.


Activations:     1

Activations can be handy when identifying a sync drop fault. Each time the modem syncs, activations will increment by 1. Ideally you would only see one activation for each time the router boots up. The more activations, the more your service is dropping sync.

                 DS Channel1      DS Channel0   US Channel1       US Channel0
Speed (kbps):             0             1568             0               542

Speed indicates the speed you are synced at in kilobits. According to that output, you are synced at 1.5mbit down by 542kbit up (roughly). Im assuming this is a limitation of your plan, as you should be seeing several megabits downstream on ADSL2+ at 26db.

[HELP] How to read dsl interface

Sun, 11 Nov 2007 16:19:58 EDT

LCPTeck posted : Hi all,

Not sure if anybody can help me. I would like to know how to read the DSL interface in a cisco router, like the below (877). Now what is all that mean? Is there any site that explains the below info? Thanks.

ATM0
Alcatel 20190 chipset information
ATU-R (DS) ATU-C (US)
Modem Status: Showtime (DMTDSL_SHOWTIME)
DSL Mode: ITU G.992.5 (ADSL2+) Annex A
ITU STD NUM: 0x03 0x2
Chip Vendor ID: 'STMI' 'GSPN'
Chip Vendor Specific: 0x0000 0x0010
Chip Vendor Country: 0x0F 0xFF
Modem Vendor ID: 'CSCO' 'GSPN'
Modem Vendor Specific: 0x0000 0x1000
Modem Vendor Country: 0xB5 0xFF
Serial Number Near: FHK105214W3
Serial Number Far:
Modem Version Near: 12.4(9)T1
Modem Version Far:
Capacity Used: 8% 100%
Noise Margin: 15.0 dB 18.5 dB
Output Power: 10.0 dBm 4.5 dBm
Attenuation: 26.0 dB 8.0 dB
Defect Status: None None
Last Fail Code: None
Watchdog Counter: 0x5B
Watchdog Resets: 0
Selftest Result: 0x00
Subfunction: 0x00
Interrupts: 8430 (0 spurious)
PHY Access Err: 0
Activations: 1
LED Status: ON
LED On Time: 100
LED Off Time: 100
Init FW: init_AMR-2.6.004.bin
Operation FW: AMR-2.6.004.bin
FW Version: 2.6.4

DS Channel1 DS Channel0 US Channel1 US Channel0
Speed (kbps): 0 1568 0 542
Cells: 0 237754 0 165005194
Reed-Solomon EC: 0 0 0 0
CRC Errors: 0 0 0 0
Header Errors: 0 0 0 0
Total BER: 0E-0 0E-0
Leakage Avarage BER: 0E-0 0E-0
Interleave Delay: 0 35 0 36

LOM Monitoring : Disabled

DMT Bits Per Bin
000: 0 0 0 0 0 0 2 3 4 5 6 6 7 7 7 7
010: 8 7 7 8 8 7 7 7 7 7 7 7 6 5 5 4
020: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
030: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
040: 0 0 0 0 0 0 0 0 0 0 0 0 0 2 0 0
050: 0 0 0 0 0 0 0 0 0 0 A 0 0 0 0 0
060: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
070: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
080: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
090: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0A0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0B0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0C0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0D0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0E0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0F0: 0 0 0 0 0 B B B A A A A A B B B
100: B B B B B B B B B B B B B B A A
110: A B B A A A A A A A A A 0 0 0 0
120: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
130: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
140: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
150: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
160: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
170: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
180: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
190: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1A0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1B0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1C0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1D0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1E0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
1F0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

DSL: Training log buffer capability is not enabled
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