max@bnr-rsc.UUCP (Max Feil) (10/31/89)
I would like to find the best way of transmitting fairly large amounts
of data from overseas. I need to transfer a minimum of 4-5 megs daily
of heavily compressed binary data via modem on public overseas dialup
lines. The system is basically meant to replace standard fax
transmissions with a more cost-effective system that will use a PC for
image scanning and data compression at one end and a similar PC for
uncompression/printout at the other. I would appreciate any and all
help in finding a suitable modem or transfer mechanism for this task.
The connection will be from Toronto Canada to Hong Kong in order to
take advantage of discounted Canadian toll charges. (Hong Kong to
North America and U.S. to Hong Kong seems to be more expensive). From
Toronto the information will pass into the continental U.S. To be
feasible, I need a data rate of at least 9600 bps with full error
detection/correction via a protocol such as MNP. I have heard of
>30Kbps rates with such modems, but is this only for local lines?
How does the potentially reduced bandwith & increased noise/dropouts
of overseas connections affect the maximum data rate I can achieve? I
have heard that some high speed modems degrade excessively in noisy
conditions. I need the fastest rate possible. Daily transfer will be
at least 4-5 megabytes, with 2 or 3 connections made per day. What are
my options for modems I can connect to a PC?
I am currently getting 30% compression on my scanned text/drawings
using Pkarc compression software (widely used on bbs's). I have heard
of other schemes that can be used to highly compress image data, but I
need to know what's commercially available.
I have investigated the use of public packet networks, but the connect
and per kilopacket charges are much to high. I am very interested in
any help somebody from the telecommunications/modem/ibm pc world can
give me.
Thanks in advance.
--
Max Feil max@bnr-rsc.UUCP or utgpu!bnr-vpa!bnr-rsc!max
Bell-Northern Research (613) 763-3093
P.O Box 3511 Station C, Ottawa, Ontario, Canada K1Y 4H7.