Cable Forum - Can you check signal levels on a Terayon modem

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Can you check signal levels on a Terayon modem

I have a Terayon modem which, it seems, does not provide the facility to log into it to check signal levels etc. Is there another way to check signal levels to the modem?

I'm having problems with heavy usage (downloading large files) and trying browse at the same time, the web browser keeps timing out and the download pauses for upto a minute, the the cable light goes of and the modem resets and then every thing starts again :erm:

Re: Can you check signal levels on a Terayon modem

Quote:

Originally Posted by jonbr

There isn't an easy way since ntl disabled snmp on the ubr's (security risk). I have done it with my Terayon using Robin Walkers Docsdiag program and manually assigning a secondary IP address in the right range using XP pro.

detailed instructions here - but I have to admit last time I tried it didn't work - possibly coz ntl had blocked the modem and it was in a huff - I used a variant of method 3 here and documented on this forum somewhere (I think!)

http://homepage.ntlworld.com/robin.d...diag/#custside

By the way I agree with your concern over signal levels I think it most likely you have a problem (upstream) - it may be worth getting an invite from a helpful tech on this site to pm them your modem mac address - ntl can read the diagnostics from their end and can also report the signal properties on their end.

Re: Can you check signal levels on a Terayon modem

it does still work:

In XP pro I have given myself a second IP address of 192.168.100.2 mask 255.255.255.0, pull the ethernet cable out of my router, plug it into the modem (without rebooting anything) then run docsdiag, save the results, swap ethernet cables back and post here.

Code:

jview /cp docsdiag.jar docsdiag -v

DocsDiag v030720 Copyright 2001-3 Robin Walker rdhw@cam.ac.uk



Terayon DOCSIS Cable Modem: <<HW_REV: 6.62; VENDOR: Terayon; BOOTR: NONE; SW_REV

: 1.7.14; MODEL: >>



System up time                       = 8 days 13h 29m 37.60s

...

IP address.192.168.100.1             = 192.168.100.1

Ethernet single-collision errs.1     = 400

Ethernet multiple-collision errs.1   = 419

Downstream channel ID                = 0

Downstream channel frequency         = 402750000 Hz

Downstream received signal power     = 6.1 dBmV

Upstream channel ID                  = 6

Upstream channel frequency           = 36784000 Hz

Upstream timing offset               = 13178 units of (6.25/64) microseconds

QoS max upstream bandwidth           = 100000 bps

QoS max downstream bandwidth         = 1024000 bps

SigQu: received without error        = 586383824 codewords

SigQu: correctable errors            = 0 codewords

SigQu: uncorrectable errors          = 0 codewords

SigQu: Signal to Noise Ratio         = 33.1 dB

SigQu: microreflections              = 24 dBc

Cable modem status                   = Operational

Upstream transmit signal power       = 39.5 dBmV

Number of interface resets           = 1

Downstream sync losses               = 0

Invalid MAP msgs received            = 0

Invalid UCD msgs received            = 0

Invalid Ranging Responses rcvd       = 0

Invalid Registration Resps rcvd      = 0

T1 timer expiries                    = 0

T2 timer expiries                    = 0

T3 timer expiries                    = 3

T4 timer expiries                    = 0

Ranging Aborts                       = 0

Tx mini-slots used (contended).180   = 0

Tx mini-slots used (dedicated).180   = 13156489

Tx data re-tries.180                 = 0

Tx data retry limit exceeded.180     = 0

Tx bandwidth req retries.180         = 8441

Tx bw req retry lim exceeded.180     = 0

Date and Time                        = 2005-10-08,21:31:26.0+00:00

Configuration filename               = cmreg-tera210x-light.cm

The above seems very good - I've never seen the upstream so low!

Re: Can you check signal levels on a Terayon modem

Thanks mmm. I'll give this ago but it will just be out of interest now. It's got to the point where I can get it to fail at will, so I called NTL, got it to fail while I was on the phone to them and they are sending an engineer to investigate.