[comp.dcom.modems] LASER modems

russ@bbx.basis.com (Russ Kepler) (02/17/91)

I'm looking for a modem pair with some (to my understanding) fairly
unusual qualities; I recall hearing that these may be available but
am not sure where to start looking.

I am looking at connecting two sites that are in line of sight.  I'd
like to get a nice high speed connection, and it occurs to me that a
modem pair using IR lasers as the tranfser would handle the problem
nicely.  Anyone have any recommendations?  Any ideas where to start
looking?

And, as long as I'm in the area, how about serial muxes on this line,
I'd like to TCP/IP using a SLIP on the line but a short term solution
might be to mux the connections.  Current plans suggest a maximum
76K baud max burst so a 38K line muxed would handle the problem nicely.

I think a solution using a real high speed connection (say T3) would 
be overkill and that anything less than 19K baud would be too slow.  

Ideas?

-- 
Russ Kepler -  Basis Int'l     SNAIL:  5901 Jefferson NE, Albuquerque, NM 87109
UUCP: bbx.basis.com!russ                                    PHONE: 505-345-5232

jparnas@larouch.uucp (Jacob Parnas) (02/23/91)

In article <1239@bbx.basis.com>, russ@bbx.basis.com (Russ Kepler) writes:
|> ...
|> I am looking at connecting two sites that are in line of sight.  I'd
|> like to get a nice high speed connection, and it occurs to me that a
|> modem pair using IR lasers as the tranfser would handle the problem
|> nicely.  Anyone have any recommendations?  Any ideas where to start
|> looking?
|> ...

How about using a 56kbit digital link?  You could either get a dedicated
line .  The prices of these services have dropped dramatically recently.
Last I checked, in the NY area, the price was $70 per month on both sides
plus $5 per mile between the sites as the crow flies per month.  I think
the services is called DDS 2.

Another alternative is to get a couple V.32 bis modems.  They go at
a minimum of 1600 chars/sec and get over 3000 chars/sec sending 
compressible data.  

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