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Telebit Corporation           Revision 1.02                01 APRIL 1990
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  SETUP INSTRUCTIONS FOR TELEBIT MODEMS AND  SCO XENIX 2.2.X

The following examples should allow easy initialization of a TELEBIT 
modem for use with UUCP on SCO XENIX 2.2.X.

Here is a typical set of files for an SCO XENIX machine (using the COM1 port, 
which is called tty1A):

   NOTE:  It is highly recommended that TELEBIT modems be connected to the
          serial I/O ports most closely attached to the cpu.  Use of serial
          I/O multiplexors may limit modem speed to 9600 bps or lower due to
          flow control, cpu/bus interrupt, or memory buffer problems.

1. ORDER UPDATE DISK:
   Order SCO TELEBIT Utilities diskette from SCO Customer Support.
   This will include new copies of "cu", "uucico", and "dialTBIT" which 
   should be installed into /usr/lib/uucp. Save your old programs first
   for archiving purposes.

2. MODIFY /usr/lib/uucp/L-devices:
   Add these lines to your L-devices file:

   ACU tty1A /usr/lib/uucp/dialTBIT 300-19200
   ACU tty1A /usr/lib/uucp/dialTBIT 300-2400

   DIR tty1A 0 19200
   DIR tty1A 0 2400

3. MODIFY /etc/ttys:
   Modify the entry for the modem port to run at 19200 bps:

      1ntty1A

   The use of a rotary or autobaud in getty is not recommended due to the
   modems ability to lock interface speed (S66=1).  The modem can then
   arbitrate a slow modem connection to the hard-set interface speed without
   the need for interface speed matching.

   If a rotary/autobaud getty is used, 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.

4. CONFIGURE MODEM SETTINGS:
   In order to configure your TELEBIT modem correctly, it is best to start
   by resetting the modem to factory settings.  Please consult your TELEBIT
   modem reference manual for the proper modem resetting procedure.
 
   Using the TELEBIT reference manual, reset the modem the tip to the modem
   (use "cu" to talk at 9600 bps) and configure it with the command string 
   below:

   AT &F S51=254 S52=2 S53=3 S54=3 S58=2 S66=1 S110=1 S111=30 S45=0 Q4 X3 &W

   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 the serial port to autobaud, with 19200 baud
               used on incoming PEP connections.
         - 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 (S53=3) sets DSR ON when the modem is off hook, and 
               DCD ON when the carrier is detected.
		NOTE:	S53 maps to registers S130 and S131 in Release B_5.00,
			GA1.00, FA2.00, and above firmware.  If S53 is not
			present in your modem firmware, be assured that its
			settings will map to the proper registers.
         - 5th (S54=3) says pass BREAKs through the modem transparently.
         - 6th (S58=2) enables RTS/CTS (hardware) flow control.
               The UUCP protocol support handles flow control during file xfrs.
         - 7th (S66=1) locks the interfaces speed at 19,200 for 
               outdialing calls.
         - 8th (S110=1) enables data compression between TELEBIT modems.
               If precompressed or binary files are transferred, 
               S110 should be set to 0 to disable compression.
         - 9th (S111=30) enables UUCP "g" protocol support in TELEBIT modem.
         - 10th (S45=0) disables remote access.  
               When the modem is reset, 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.
         - 11th (Q4) silences the modem when an inbound call arrives.  
               This prevents getty battles between the RING result code and 
               getty's echo of the same.
         - 12th (X3) sets the result codes to Extended (full result codes)
         - 13th (&W) writes these new values into the current EEPROM bank (1/2).
                This saves the new values as the modem's power on defaults, for
	        either bank A or B, until you change them again.
         - 14th (<CR>) terminates the command to the modem.

   After this, when you want to talk directly to the modem, use the
   command "cu -s 19200 dir" to talk at 19200 bps. Remember to 
   "disable tty1A" before using "cu" to prevent getty from confusing 
   your responses with a login.
\f



    NOTES:      (1)  S58 sets the type of flow control to be used by the
                     modems serial I/O port.  It is highly recommended that
                     RTS/CTS (hardware) flow control (S58=2) be used whenever
                     possible.  Please consult your systems manuals for
                     instructions on proper software and hardware
                     configurations for RTS/CTS flow control.  Some hardware
                     systems or operating systems may not be capable of this
                     function.

                (2)  S92 governs the sequence of modulation tones issued
                     upon auto answer.  To reverse the answering sequence,
                     set S92=1, this will solve any "slow modem" connection
                     problems caused by the issuance of PEP tones.  ALL
                     incoming PEP modems should have S50=255 set to connect
                     using PEP.

                (3)  If you would like to limit dialin/dialout connection
                     access to high-speed (PEP mode), add "S50=255" to the
                     above script to force the modem to use only the PEP mode.
                     To allow dial OUT to slower speed modems, modify the
                     L.sys script to exclude the dialTBIT options:

   hostname Any ACU 19200 NNNNNNN "" \d ogin:--ogin: Uyoursysname word: XXXXXX
        
5. MODIFY /user/lib/uucp/L.Sys:
   Here is a typical L.sys file entry.  Don't copy this literally. Modify
   the info for your application.  Also note that this is ONE line of data,
   not two.

   hostname Any ACU 19200 NNNNNNNucp "" \d ogin:--ogin: Uyoursysname word: XXXXXX

   NOTES:
   hostname     = THEIR System name
   NNNNNNNNNN   = THEIR System phone number
   Uyoursysname = Your UUCP account on THEIR machine
   XXXXXXXX     = Your UUCP passwd on THEIR machine
   ucp          = Options in the dialTBIT dialer for compression and uucp support

   The "chat" script is the most common point of wasted connection time and
   login failure.  Be sure to test this entry rigorously to verify a successful
   login in the fastest time possible.

6. TEST UUCP:
   UUCP can now be tested by issuing the following command:

     /usr/lib/uucp/uucico -r1 -x4 -shostname

   Upon success or failure of the UUCP session, the status file must be
   removed before another UUCP session can be started with the above command.

     rm /usr/spool/uucp/STST.hostname
   
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
high speed UUCP "g" via TELEBIT modems.


	Michael Ballard/Cerafin E. Castillo
	Telebit Corporation
	1315 Chesapeake Terrace
	Sunnyvale, CA  94089
        1-800-TELEBIT

            UUCP:     {ames, uunet, sun, pyramid, decwrl}!telebit!modems

        INTERNET:     modems@telebit.com
DataMuseum.dk

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