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GiDDY_SOUL
Tl Posts:
4

Bangladesh
Posted - 6/22/2007 11:41:52 AM  Show Profile  Email Poster  Edit Message
I have a strange problem with my modem. After Some time (2-3 min) my modem stop data transmission and resumes after 3-4 sec. this keeps happeing all the time1. WHY?

Is there any way to solve it?

v.Richard
Tl Posts:
6222

USA
Posted - 6/23/2007 11:16:17 AM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Likely (fast)retrain or error/error correction.
Likely solution - force modem to connect at slower speed = reduced error count.
www.modemsite.com/56k/x2-linklimit.asp
www.modemsite.com/56k/ms.asp

To see details/diagnostics of the connection -
www.modemsite.com/56k/diag.asp

Aloha! Richard.

GiDDY_SOUL
Tl Posts:
4

Bangladesh
Posted - 6/23/2007 5:39:16 PM  Show Profile  Email Poster  Edit Message
Here is a link of how the data transmission looks like. Even if it's the auto retrain feature. I see no speed differece in the picture after the pause. Can i disable auto retrain or whatever is causing it?

[URL=http://imageshack.us][IMG]http://img182.imageshack.us/img182/1718/clippn7.jpg[/IMG][/URL]

GiDDY_SOUL
Tl Posts:
4

Bangladesh
Posted - 6/24/2007 11:31:43 AM  Show Profile  Email Poster  Edit Message
I usually get speeds of 49.2 kbps.

Even if i force connection speed to 33.6 kbps... My modem still keeps pausing after sometime. I used a different modem too, but doesnt help.

v.Richard
Tl Posts:
6222

USA
Posted - 6/25/2007 8:10:28 PM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
Suggest to check your post-call diagnostics -
www.modemsite.com/56k/diag.asp

It is also possible that it has nothing per se to do with your modem but is something related to your ISP.

Check a Coenxant command reference manual for the ability to disable fast retrains, and for using different options/protocols for error correction and compression.

Aloha! Richard.

GiDDY_SOUL
Tl Posts:
4

Bangladesh
Posted - 6/26/2007 9:18:03 AM  Show Profile  Email Poster  Edit Message
AT#UG

<#UG VERSION=3>
<DRIVER VERSION=173.037.000.000>
<CALL SETUP RESULT=Detected V.8bis Tone>
<MULTIMEDIA MODE=Data Only>
<DTE-DCE MODE=Async data>
<V.8 CM="">
<V.8 JM="">
<RX SIG PWR DB=15, TX SIG PWR DB=10, S/N RATIO DB=38>
<RTD=24>
<TX MOD=V.90, TX SYMBOL RATE=3200, TX CARRIER FREQ=1829>
<RX MOD=V.90, RX SYMBOL RATE=8000, RX CARRIER FREQ=0>
<TX FIRST RATE=26400, RX FIRST RATE=49333>
<TX FINAL RATE=26400, RX FINAL RATE=49333>
<RATE RENEG REQ=0, RATE RENEG DET=0>
<RETRAINS REQ=0, RETRAINS DET=2>
<PROTOCOL=LAPM>
<EC FRAME SIZE=80>
<EC LINK TIMEOUTS=0>
<EC LINK NAKS=0>
<COMPRESSION=V44>
<COMPRESSION DICTIONARY SIZE=800>
<TX FLOW CONTROL=2>
<RX FLOW CONTROL=2>
<TX CHARS SENT FROM DTE=515C1>
<RX CHARS SENT TO DTE=1569BC>
<TX CHARS LOST=0>
<RX CHARS LOST=0>
<TX FRAME COUNT=E12>
<RX FRAME COUNT=1DA7>
<TX FRAME ERROR COUNT=64>
<RX FRAME ERROR COUNT=0>
<TERMINATION CAUSE=DTR drop>
<CALL WAITING EVENT COUNT=0>
<RBS=0, AltRBS=0>
<DIG PAD DET=0, DIG LOSS EST=8192, IMD=9, SPEED DROP=17, LOOP6 BIT=0>
<HS CNT=1, FB CAUSE=0, PROT NEG=2>
<EQM=5232, TRAINING EQM=41670>
<COMPANDING=A-LAW>
<DCTAP=NA>
<RATESEL=17>
<RATERES=0,0>
<IMD=11,19,48,256>
<P2PROBE=0,38,27,32,3,3,252,242>
<TRN TIME=15688, NEG TIME=516, SESSION TIME=503971>
<DNLD FAILURE=0>
<QCPROFILE ACTION=0>

OK


How to disable fast retrains?

v.Richard
Tl Posts:
6222

USA
Posted - 7/2/2007 7:37:51 PM  Show Profile  Email Poster  Edit Message  v.Richards Homepage
If I'm not mistaken, those diags indicate the REMOTE modem requested the retrains.
Generally, you can eliminate retrains by reducing the maximum connect speed which makes the connection more reliable/less susceptible to noise.

I would experiment with different speed limits, both up and down stream limits.
www.modemsite.com/56k/x2-linklimit.asp

Aloha! Richard.

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