Path: utzoo!utgpu!news-server.csri.toronto.edu!bonnie.concordia.ca!uunet!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!fuug!demos!avg
From: avg@hq.demos.su (Vadim Antonov)
Newsgroups: comp.mail.uucp
Subject: Re: Using UUCP over international phone lines
Keywords: satellite packet-size acknowledgment delays
Message-ID: <1991Jan24.113256.10047@hq.demos.su>
Date: 24 Jan 91 11:32:56 GMT
References: <267@fgh.fgh.oz.au>
Organization: DEMOS, Moscow, USSR
Lines: 27

In <267@fgh.fgh.oz.au> michael@fgh.fgh.oz.au (Michael Coyne) writes:

>I am using UUCP between two 4800 baud MNP4 modems - one in Holland, and
>the other in Sydney, Australia.
>Has anyone had a similar experience, and able to offer me any advice
>about how to improve my throughput?  At $1.60/minute, and with Megabytes
>to ship, every little bit helps.

Buy Telebits! Saving some 50 hrs of communication time (a couple of months
of work) will cover your expences for these devices. These beasts are really
wonderful! We're running an inernational link Moscow-Helsinki over
*extermely* terrible phone line with an effective speed about 7000 bps
(actually we have T2500 and TrailBlazer at the ends). Over quality lines
it'll be much better. Telebits know UUCP and reassemble packets
at the ends sending ACKs immediately (it's especially good for satellite
links). The only drawback of using Telebits is rather small efficiency
on small files - but it can be easily defeated using some batching
scheme (say BSMTP; anyway batchers are rather simple and it's nothing
more than a programming etude for a couple of days). T2500 is a good
choice taking into account it supports V.21, V.22, V.22bis, Bell 103,
Bell 212, V.32, V.42bis (LAP-M), MNP-5 and PEP (native mode protocol).
The seventh relese of firmware contained a bug so I recommend you
to use T2500 with a firmware rel. GE 6.00 (it does not support protocol
spuffing over V.32, but it's nearly useless).

Vadim Antonov
DEMOS, Moscow, USSR