modems@telebit.UUCP (Modem Mail Account) (03/10/88)
Due to a number of requests both by phone and by Email, I am posting
the first in a series of configurations for the Telebit TrailBlazer
and various Systems. This one is for the Sun 3 series of workstations.
I believe it to be correct, and if anyone has any questions or problems
with it, please email to me with your comments.
Regards
================================================================================
Richard Siegel Phone: (408) 996-2644
Senior Systems Engineer UUCP: {uunet,ames,hoptoad}!telebit!rls
Telebit Corporation ARPA: telebit!rls@ames.ARPA
"When the going gets tough, the weird turn pro"...HST
================================================================================
SETUP INSTRUCTIONS FOR TELEBIT TRAILBLAZERS and SUN WORKSTATIONS
The following examples should allow easy initialization of a Telebit
TrailBlazer Plus modem for use with UUCP on a current SUN 3 or SUN 4
workstation.
1. MODIFY KERNEL:
First, the kernel must be modified so that the modem can dial/answer calls.
cd /usr/sys/conf
cp GENERIC MODEM
------edit MODEM-- change:
device zs0 at obio ? csr 0x20000 flags 3 priority 3
to:
device zs0 at obio ? csr 0x20000 flags 0 priority 3
-----save the file.
/etc/config MODEM
cd ../MODEM
make
mv /vmunix /vmunix.old
mv vmunix /vmunix
---reboot the system----------
2. CREATE THE DIAL OUT DEVICES (if necessary):
This will create the entries in /dev/to dial out with the modem.
cd /dev
mknod cua c 12 128
mknod cub c 12 129
chmod a+wr cua cub
References to dialout ports in this document assume the ttya port "cua". If
you are connecting to ttyb, remember to substitute "cub" where appropriate.
3. MODIFY /etc/gettytab:
This allows modem operation at 19200 bps.
cd /etc
--- edit gettytab, add this entry to the list:
z|std.19200|19200-baud:\
:sp#19200:
--- save the file.
4. MODIFY /etc/remote
Add these entries (all characters are literal, i.e. the ^ is 'shift 6'
on the Sun):
hard:dv=/dev/cua:br#9600:el=^C^S^Q^U^D:ie=%$:oe=^D:
cua:dv=/dev/cua:br#19200:el=^C^S^Q^U^D:ie=%$:oe=^D:
5. CONFIGURE MODEM
If the modem is NOT fresh out of the box from the factory, the reset button
on the back of the TrailBlazer Plus should be pressed. Use a paperclip or
some handy tool like that to depress the small micro switch located
(recessed) through a small hole next to the RS232 serial connector.
Make sure the modem is powered ON when depressing the switch.
With the modem now reset, tip to the modem (use "tip hard" to talk at
9600 bps) and configure it with the command string below:
AT &F S51=254 S52=2 S54=3 S110=1 S111=30 S45=0 S58=0 S53=3 Q6 &W <CR>
This string (the spaces are optional if you prefer to remove them) will:
- 1st (&F) recalls factory defaults (start with known configuration).
- 2nd (S51=254) sets up autobauding on the serial port.
(type the letter "a" serveral times until you see it echoed).
NOTE: Some versions of Telebit's User Manual overlooked this
value for S51. It behaves exactly as the documented value
255 except that a serial interface speed of 19200 is
assumed on an incoming call. (S51=255 sets the speed to
9600 on an incoming call.
- 3rd (S52=2) says drop the connection when DTR is dropped to the modem
and reload the modem's stored EEPROM values (do a soft reset).
- 4th (S54=3) says pass BREAKs through the modem transparently.
- 5th (S110=1) enables data compression between TrailBlazers.
If desired, S110=0 will disable this feature.
- 6th (S111=30) enables UUCP "g" protocol support in the TrailBlazer.
- 7th (S45=0) disables remote access.
When the reset button is pressed, remote access is enabled to
allow easier customer support from Telebit. This is not the
case when the modem is originally shipped from the factory.
Remote access is not necessary for this application.
- 8th (S58=0) disables flow control.
The UUCP protocol support handles flow control instead.
- 9th (S53=3) sets DSR "ON" when modem is off-hook.
It also sets DCD "ON" when carrier is detected.
- 10th (Q6) silences the modem when an inbound call arrives.
This prevents getty battles between the RING result code and
getty's echo of the same.
- 11th (&W) writes these new values into the EEPROM.
This saves the new values as the modem's power on defaults from
now until you change them again.
- 12th (<CR>) terminates the command to the modem.
After this, when you want to talk directly to the modem, use "tip cua"
to talk at 19200 bps, since you just set the interface speed to 19200.
NOTE: If you want to prevent anyone from dialing IN at other than
high speed (PEP mode), add "S50=255" to the above script to
force the modem to use only PEP mode in dial IN. To allow
dial OUT to other speed modems, modify the L.sys
script (noted below in step 9) to:
hostname Any cua 19200 cua "" ATX0S50=0\r 0 ATDNNNNNNNNNN\r 1 ""
""-\r-login:-\r-login:-\r-login: \r login: Uyoursysname ssword: XXXXXXXX
6. ENABLE GETTY FOR DIALIN:
cd /etc
--- edit ttys and change:
0fttya
to:
1zttya
--- restart getty on ttya:
kill -1 1
Don't forget to set your getty to include 19200 in its cycle.
You may have it trying 19200 first and moving to 2400 on the 1st
receipt of a break and to 1200 on the second receipt of break.
The order of the cycle is not important so long as the calling
system knows to send breaks until it sees the login sequence.
7. MODIFY /usr/lib/uucp/uucico TO RUN 19200 BPS:
To use uucico at 19200, you must modify the Sun version using "adb".
We will use the 4800 baud slot and replace it with 19200.
cd /usr/lib/uucp
cp uucico uucico.orig
adb -w uucico
20000?L 0t4800
--- at this point you'll get output something like:
20a0c:
--- so enter:
?DD
--- it will respond with ADDRESS:DATA like:
20a0c: 4800 12
--- so enter:
?W 0t19200 0t14
--- now type ^D. This completes the uucico modification.
NOTE: Don't forget to set the permissions and ownership of uucico to be
the same as uucico.orig.
8. MODIFY /usr/lib/uucp/L-Devices:
This may be copied almost literally. Fill in the correct port #
DIR cua 0 19200
9. MODIFY /usr/lib/uucp/L.sys:
Don't copy this literally. Modify the info for your application.
Also note that this is ONE line of data, not two.
hostname Any cua 19200 cua "" ATX0\r 0 ATDNNNNNNNNNN\r 1 ""
""-\r-login:-\r-login:-\r-login: \r login: Uyoursysname ssword: XXXXXXXX
NOTES:
hostname = THEIR System name
NNNNNNNNNN = THEIR System phone number
Uyoursysname = Your UUCP account on THEIR machine
XXXXXXXX = Your UUCP passwd on THEIR machine
You should now be able to run UUCP between two machines attached to your
modems just as you always have with slower modems. Enjoy the new world of
of high speed UUCP "g" via the Telebit TrailBlazer Plus.
Richard Siegel
Telebit Corporation
Suite 200
20410 Town Center Lane
Cupertino, California 95014
{ames, uunet, hoptoad, sun, dwon}!telebit!modems