[comp.dcom.modems] TBit Satelite Connections

bob@semantic.UUCP (08/08/90)

Hi,

> drivax!braun@uunet.uu.net  (Karl T. Braun (kral))

> We are trying to set up communications with someone in Germany.  We have a
> telebit T2500, they have a T1000.  The main purpose of the connection is for
> file transfer, but the initiating sequence must be interactive (kermit).  Of
> course the echo delays are annoying, but they seem to get bounced off after 5
> minitues or so (NO CARRIER).  We have no problem with local connections.  
> If anyone has any ideas or thoughts on this I would appreciate some mail on it

I did an interactive software demo with *LOTS* of screen painting across the
country.  From Boston Mass to Fairbanks Alaska.  When talking to people
on the phone there is a huge satalite delay and voice echos every where.
It sounds like their routing the phone conversation through the Alaskan
pipe line.  Any way the demo came off Great! 

I called telebit and they sent me some documentation.  You should call
them and ask for: 'International and Satelite Connection Considerations'

Along with my usual setting I used the following:

	j6	Enable calibration tones
	s7=60	Carrier detect time to 60 seconds
	s10=14	Carrier loss time to 14 seconds
	s36=1	50 msec calibration tone
	s50=255	Connect in PEP mode
	s110=1	Enable data compression
	s111=30	Enable uucp protocol
	s120=12	Disable micro packets
	s121=1	Enable echo suppressor compensation

Now this works best for interactive, for file transfer the settings
will be different.  The document has a description off the registers.

Good Luck!

-- Robert A. Gorman (Bob)        bob@rsi.com           Watertown MA US --
-- Relational Semantics, Inc.    uunet!semantic!bob    +1 617 926 0979 --