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echo: aust_modem
to: Simon Byrnand
from: Bill Grimsley
date: 1996-07-17 14:55:44
subject: Re: problems

Simon, at 21:33 on Jul 14 1996, you wrote to Bill Grimsley...

BG> Many Rockwells have problems with V.42 negotiation, whilst some Hayes

SB> Aha! That explains a lot, I'm not going mad after all! :-)

Of course, we only have your word for that.  :)

SB> Node 1 of the BBS I run has an old 28.8K VFC Rockwell-based Dynalink (dont 
SB> have the model in front of me sorry) and I simply CANNOT get a V42bis 
SB> connect to it, instead I always get REL-MNP5. The modem I'm trying to ring 
SB> it with is a Dynalink 1414VQH-L. Every other BBS in town I try ringing, 
SB> including NODE2 of the same BBS, (which has a totally different GVC 14.4K) 
SB> I get LAPM-V42BIS connects.

That's odd, as I had a couple of 1414-VQHs for a while, and they never
failed to connect at LAPM/V42bis, regardless of the brand of remote modem. 
Sounds like your Dynalink V.FC could do with an EPROM update (don't hold
your breath waiting for Askey to provide one though), particularly as it
likely has the terribly buggy early-model 04BC Rockwell chipset.

SB> And YET, other people have reported no problems getting a V42BIS connect
SB> to it, and it makes OUTGOING V42BIS connects fine, although I havn't had
SB> the opertunity to try an outgoing connect to my modem at home. (The BBS
SB> is not at home, in case you were wondering)

That's the problem with interconnectivity; similar Rockwells tend to
connect fine with each other, whilst those with say AT&T or TI chipsets
may have to perform a bit of judicious tweaking in order to enjoy the same
degree of reliability when calling some Rockwell-based modems.  For
example, one particular M34F which I call with my Courier will sometimes
connect without error correction unless I disable the V42 detect phase
first, and I've been reliably informed that the fault definitely lies with
the M34F's interpretation of V42.  Same with the faulty implementation of
the 3429 symbol rate in some Hayes V.34 modems.  Not all modems are created
equal.

SB> This puzzles me a bit, and unfortunately, I dont have a manual for the
SB> 28.8K dynalink, so I'm a bit in the dark...any ideas?

None at all, I'm afraid.

SB> Oh, and all 3 modems are internal...

That shouldn't make any difference, unless they're being used on Pentium
machines with Triton I chipsets.

Regards, Bill
@EOT:

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