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Re: (ASCEND) Retrains

For better, worse, or silly LAPM (v.42) is in fact designed to disconnect
if it doesn't like what's happening.  There is some formula, but I don't
know what it is and it probably doesn't really matter unless your writing a
modem.

A possible work-around is to simply disable v.42 error control (either at
the client end or yours), but if the lines (or connections) are that bad,
it might not buy you much.  Another possible work-around could be to
restrict the modem connection rate, but your already showing 14.4k, and ya
don't get much worse than that.

Also, if the client is using a sportster (or is it courier?), people have
reported better success with disabling v.42bis on the client side... seems
odd to me, but that's what they've said, at least when connecting to K56Flex.

Do you get CRC errors in your WAN Stat window?

BTW, how do you generate those reports?


Joseph

At 04:54 PM 9/17/97 -0400, Alex P wrote:
>Hi all,
>
>Can anyone tell me a little more about this.  Unless I'm mistaken,
>disconnecting a modem after it retrains 3 times seems silly.  Isn't a
>modem supposed to keep reacting to lines conditions, and down/upshift
>accordingly?  Is there a formula for deciding if there are too many
>retrains in a certain period of time?
>
>Alex P
>
>TERMINATION REASON.......... 3 RETRAINS
>LAST TX rate................ 300 BPS
>HIGHEST TX rate............. 14400 BPS
>LAST RX rate................ 14400 BPS
>HIGHEST RX rate............. 14400 BPS
>PROTOCOL.................... LAPM
>COMPRESSION................. V42Bis
>Line QUALITY................ 127
>Rx LEVEL.................... 043
>Highest Rx State............ 00
>Highest TX State............ 00
>EQM Sum..................... FF00
>RBS Pattern................. FF
>Rate Drop................... FF
>Local Rtrn Count............ 01
>Remote Rtrn Count........... 00
>V8bis  not successful
>
>TERMINATION REASON.......... 3 RETRAINS
>LAST TX rate................ 26400 BPS
>HIGHEST TX rate............. 26400 BPS
>LAST RX rate................ 24000 BPS
>HIGHEST RX rate............. 24000 BPS
>PROTOCOL.................... LAPM
>COMPRESSION................. V42Bis
>Line QUALITY................ 127
>Rx LEVEL.................... 053
>Highest Rx State............ 21
>Highest TX State............ 67
>EQM Sum..................... 007A
>RBS Pattern................. FF
>Rate Drop................... FF
>Local Rtrn Count............ 01
>Remote Rtrn Count........... 00
>V8bis  not successful
>
>TERMINATION REASON.......... 3 RETRAINS
>LAST TX rate................ 14400 BPS
>HIGHEST TX rate............. 14400 BPS
>LAST RX rate................ 14400 BPS
>HIGHEST RX rate............. 14400 BPS
>PROTOCOL.................... LAPM
>COMPRESSION................. V42Bis
>Line QUALITY................ 102
>Rx LEVEL.................... 043
>Highest Rx State............ 00
>Highest TX State............ 00
>EQM Sum..................... FF00
>RBS Pattern................. FF
>Rate Drop................... FF
>Local Rtrn Count............ 01
>Remote Rtrn Count........... 00
>V8bis  not successful
>
>Alex P
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