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New Member

ADSL line quality

hallo I have a problem with a cisco1801 IOS (c180x-broadband-mz.123-8.YI2.bin) that does not get sync on an ADSL line. On the same ADSL line a cisco1841 does get the sync.

This is the "sh dsl int atm0/0/0" from cisco1841:

cisco1841#sh dsl int 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' 'TSTC'

Vendor Specific: 0x0000 0x0000

Vendor Country: 0x00 0xB5

Capacity Used: 24% 83%

Noise Margin: 32.5 dB 12.0 dB

Output Power: 20.0 dBm 12.0 dBm

Attenuation: 42.0 dB 24.0 dB

Defect Status: None None

Last Fail Code: Handshake or init message invalid or had bad CRC

Selftest Result: 0x00

Subfunction: 0x15

Interrupts: 1335 (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

Interleave Fast Interleave Fast

Speed (kbps): 1504 0 608 0

Cells: 0 0 283651 0

Reed-Solomon EC: 0 0 0 0

CRC Errors: 0 0 0 0

Header Errors: 0 0 0 0

Bit Errors: 0 0

BER Valid sec: 0 0

BER Invalid sec: 0 0

LOM Monitoring : Disabled

DMT Bits Per Bin

00: 0 0 0 0 0 0 0 4 6 7 8 9 9 A A A

10: A A 9 A 9 9 9 9 8 8 8 7 7 6 0 0

20: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2

30: 2 2 2 2 3 3 3 4 4 4 4 4 5 5 5 4

40: 0 4 4 4 4 4 4 4 4 4 4 4 4 4 4 4

50: 4 4 4 3 3 0 2 3 4 4 4 4 4 2 5 5

60: 5 5 5 5 5 5 5 5 5 4 2 2 4 4 4 5

70: 5 5 5 5 5 5 5 5 5 5 5 5 5 5 5 4

80: 0 4 4 3 3 4 4 4 4 4 4 4 4 4 4 4

90: 4 4 4 4 3 0 3 3 3 3 3 2 2 2 2 2

A0: 2 2 2 3 3 3 3 2 2 2 2 2 2 2 2 2

B0: 2 2 0 2 2 2 2 2 2 2 2 2 2 2 0 2

C0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

D0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

E0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

F0: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

DSL: Training log buffer capability is not enabled

cisco1841#

Command Lookup only said that attenuation is high.

I did not find docs on the Internet about Vendor Id TSTC.

Anyone can tell me info about the parameters reported in "sh dsl interface

atm " ?

A capacity used of 24% means that the line is underutilised ?

What are a good range values for Attenuation, Noise-margin and capacity in down and upload ?

What is the mean of output-power and where is it measured ?

best regards

francesco

1 REPLY
New Member

Re: ADSL line quality

Hi,

Compare the modulation(DSL Mode:) of Cisco 1801 with Cisco 1841.

hope this works...

Note: rate it if it works.

Regards,

Akhtar

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