[comp.dcom.modems] Need help with T2500/TB+ compatiblilty problem

kent@tfd.UUCP (Kent Hauser) (11/05/90)

I have just replaced a T2500 on one of my dialup lines with an
older TB+ (BA4.00 ROMS).  Now uucp sessions to one of my TB+
neighbors fails. (Replacing the TB+ with the T2500 fixes problem.)

The site that fails is a trans-atlantic connection. Actual connection
consists of a leased data line (trans-atlantic), who know how many
stat-muxes, etc, and a local (Washinton,DC) TB+ connection. However,
because of the setup, there is a higher than usual latency, which
makes for a `bursty' connection.

I hope this rings a bell with someone.  I need to leave the TB+ on
the line.

For what it's worth, below is the programming script for both TB modems.

===
AT &F S51=5 S52=2 S54=3 S110=0 S111=30 S45=0 S58=2 S53=3 S66=1
AT S45=255 S0=1 S102=1 Q6 V0 X0 M0 &W
===

	Kent

-- 
Kent Hauser			UUCP: {uunet, sun!sundc}!tfd!kent
Twenty-First Designs		INET: kent@tfd.uu.net
(202) 408-0841	

cec@cup.portal.com (Cerafin E Castillo) (11/07/90)

I would do two things:

Upgrade your TB+ to BA5.01 firmware.

Set S120=12 and J6S36=[1-3], as needed for your trans-Atlantic
connection.  Do this is the following way:

ATS120=12

ATJ6S36=2

GOOD LUCK!

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Cerafin E. Castillo                       ||      //\\  ||\\  ||
Network Consultant                        ||     //__\\ || \\ ||  Los Altos
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