From: ahm@spatula.rent.com (Andreas Meyer)
Newsgroups: comp.sys.att,comp.dcom.modems
Subject: Problem with EPORTS and Telebit T1600
Summary: Can't connect. Why?!
Date: 7 Sep 92 17:39:43 GMT
Reply-To: ahm@spatula.rent.com
Followup-To: poster
Distribution: na
Organization: A kitchen utensil somewhere in central New Jersey

SITUATION:

I've already got a HayesSmartmodem 2400 connected to an HPP in my
AT&T 3B2/310. It's doing incoming and outgoing calls with no problem.
Now I want to add a Telebit T1600 to the system and because of the
higher baud rate, I'm using an EPORTS card. But I haven't been able
to talk to the Telebit modem! Is there something special I need to do?

WHAT I DID:

For the physical connection, I'm using an AT&T "black cable" and
an ACU MODEM adapter.

Since the Telebit will only be dialing out, I made no changes
to /etc/inittab.

In /usr/lib/uucp/Dialers, I decided to use the 'hayes' dialer:

#   Hayes Smartmodem -- new BNU modem control capabilities
#   If you do not want to strap CD on, use these switch settings:
#
#
#       S1 - UP		S2 - UP		S3 - DOWN	S4 - UP
#       S5 - UP		S6 - UP		S7 - ?		S8 - DOWN
#
#   and this dialer entry (comment out the earlier one):
#
hayes	=,-,	"" \M\dAT\r\c OK\r \EATDT\T\r\c CONNECT \m\c
#
#   Furthermore, you must add a ",M" subfield to the line field
#   (field 2) of the associated Devices file entries, as shown here:
#
#	ACU culd0,M - 1200 hayes \T
#
#   The ",M" subfield will cause the device to be opened with O_NDELAY set
#   (so the open doesn't hang waiting for carrier).  After the open,
#   O_NDELAY is cleared.  Then, in the dialer script, "\M" sets CLOCAL and
#   "\m" clears it.  Typically, CLOCAL is set for the duration of the
#   dialer chat, then cleared (so uucico and cu will detect dropped lines)
#   once you're connected to the remote system.

And I added these entries to /usr/lib/uucp/Devices:
ACU tty28,M - 19200 hayes \T
Direct tty28 - 19200 direct \T

That should be it, right?

WHAT IT DOES:

For testing, I tried to talk to it "direct":

# cu -d -ltty28
altconn called
Device Type Direct wanted
getto ret -1
Connect failed: CAN'T ACCESS DEVICE
call cleanup(1)
call _mode(0)
#

The EPORTS drivers are loaded:
eports    AT&T 3B2 Enhanced Ports Utilities Release 1

I thought there might be something about the way the T1600 was setup, so
so I pulled it over to my trusty PC, and did an AT&F3 (as suggested by 
Telebit technical support), and tried again.  Still no go.

I changed some other parameters, and here's what the modem is set to now:

at&v
T1600 - Version LA1.00  - Active Configuration
 B1  E1  L1  M1  P   Q2  V1  X12  Y0 
&C2 &D3 &G0 &J0 &L0 &Q0 &R3 &S0 &T4 &X0 
S000=0   S001=0   S002=43  S003=13  S004=10  S005=8   S006=2   S007=40 
S008=2   S009=6   S010=14  S011=70  S012=50  S018=0   S025=5   S026=1  
S038=0   S041=0   S045=0   S046=0   S047=4   S048=0   S050=0   S051:254
S056=17  S057=19  S058:0   S059=0   S060=0   S061:0   S062=15  S063=0  
S064:1   S068:3   S069=0   S090=0   S093=8   S094=1   S100=0   S102=0  
S104=0   S105=1   S111:30  S112=1   S180:3   S181=1   S183=25  S190=1  
S253=10  S254=255 S255=0   
OK

...and it still doesn't work.

All the hardware is fine. The Telebit has been in steady service 
on my PC. I've tried different cables, connectors, using different ports 
on the same EPORTS card; I replaced the EPORTS card with another one and
have the same problem. I'm using a breakout box to watch the pins and
compare the connection to that of the Hayes; there's no apparent
difference.

And since I'm able to talk to the Telebit at 2400 if I plug the Hayes'
cable into it, I'm more inclined to think it's something with the 
EPORTS board.

I've got the HPP in slot 1, the EPORTS in slot 2, a CTC for my XM in
slot 3 and slot 4 is empty.

What have I missed?  If you've got a Telebit connected via EPORTS
to your 3B2, I'd like to hear from you.  I'd appreciate any pertinent 
info, or helpful hints.

Please e-mail, and I'll summarize if there's any interest.

Thanks,
Andy
--
 Andreas Meyer, N2FYE       Just bouncing through the pinball game of life...
 ahm@spatula.rent.com       Today, I think I'm stuck behind a flipper. :-)
Newsgroups: comp.sys.att