Path: utzoo!attcan!uunet!wuarchive!usc!apple!vsi1!daver!ditka!qiclab!redsun!shawni
From: shawni@redsun.UUCP (Shawn Instenes)
Newsgroups: comp.dcom.modems
Subject: A working T2500+Sun 3/180+SunOS 4.0.3 configuration
Keywords: T2500 telebit sun
Message-ID: <199@redsun.UUCP>
Date: 25 Nov 89 01:46:56 GMT
Organization: Portland Public Schools, Portland, Or
Lines: 63


Using a Telebit T2500 with a Sun 3/180 (while retaining your sanity)

Our Configuration: A Sun 3/180 running SunOS 4.0.3, and the T2500 on
"ttyb" (ttyd1/cua1).

When our department bought a T2500, I thought that such an advanced
modem must be a snap to configure, right?  Well, yes and no.  It was to
be attached to a Sun 3/180 for both UUCP and remote logins.  I worked
with it for a while, and soon was able to get successful connections at
up to 2400 bps, but if I tried V.32 or PEP, uucico would abort after a
string of "alarm" errors.  After some fiddling and calling up support
numbers, I (finally) came up with this configuration:

Configuration A (UUCP & Dialup)

E0 F1 M1 Q4 P V1 W0 X1 Y0 &P0 &T4     Version GA2.00
S00=001 S01=000 S02=043 S03=013 S04=010 S05=008 S06=002 S07:080 S08=002 S09=006
S10=007 S11=070 S12=050 S18=000 S25=005 S26=000 S38:020 
S41=000 S45=000 S47=004 S48=000 S49=000
S50:254 S51:254 S52:002         S54:003 S55:003 S56=017 S57=019 S58:000 S59=000
S60=000 S61:001 S62=003 S63=001 S64:001 S65=000 S66=000 S67=000 S68=255 S69=000
S90=000 S91=000 S92:001 S93=008 S94=001 S95=000 S96=001 
S100=000 S101=000 S102=000 S104=000 S105=001 
S110=255 S111:030 S112=001 
S121=000 S130:004 S131:001 
S150=000 S151=004 S152=001 S153=001 S154=000 S155=000 
S160=010 S161=020 S162=002 S163=003 S164=007 S255:001 

Configuration B (tip & kermit dialout)

E1 F1 M1 Q0 T V1 W1 X14 Y0 &P0 &T4     Version GA2.00
S00:000 S01=000 S02=043 S03=013 S04=010 S05=008 S06=002 S07:080 S08=002 S09=006
S10=007 S11=070 S12=050 S18=000 S25=005 S26=000 S38:020 
S41=000 S45=000 S47=004 S48=000 S49=000
S50:254 S51:252 S52:002         S54:003 S55=000 S56=017 S57=019 S58:000 S59=000
S60=000 S61:001 S62=003 S63=001 S64=000 S65=000 S66:001 S67=000 S68=255 S69=000
S90=000 S91=000 S92=000 S93=008 S94=001 S95=000 S96=001 
S100=000 S101=000 S102=000 S104=000 S105=001 
S110=255 S111:010 S112=001 
S121=000 S130:004 S131:001 
S150=000 S151=004 S152=001 S153=001 S154=000 S155=000 
S160=010 S161=020 S162=002 S163=003 S164=007 S255:001 

Please note that only the registers listed with a colon (:) are changed
from the default setting.

There is one more register used in both configurations, not listed in
the manual OR in the ATN? display.

ATS53=003.

What is that, you ask.  Beats me.  I find it odd that S53 is not
documented or displayed (even though there is a nice open space to have
it printed later, right between S52 and S54).  I also thought it odd
that the configurations turn OFF modem/host flow control (S58 & S68).

Does anyone know what this register is used for?

-- 
Shawn Instenes     UUCP:...!nosun!qiclab!redsun!shawni
Senior Programmer, Research Dept., Portland (OR) Public Schools
Disclaimer:  PPS pays me for my work, not my opinions.