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From: marc@dumbcat.sf.ca.us (Marco S Hyman)
Newsgroups: comp.unix.sysv386,comp.dcom.modems
Subject: Re: Getty for ISC/Telebit T-2500 w/autobaud via the CONNECT msg?
Summary: Lock the DTE/DCE interface speed
Keywords: Telebit, getty, autobaud, bi-directional
Message-ID: <1060@dumbcat.sf.ca.us>
Date: 15 Jun 91 19:17:12 GMT
References: <1991Jun15.030807.28565@pegasus.com>
Followup-To: comp.unix.sysv386
Organization: MH Software, Hayward, CA.
Lines: 47

In article <1991Jun15.030807.28565@pegasus.com> richard@pegasus.com (Richard Foulk) writes:
 > Does anyone have a getty working with ISC Unix and Telebit modems
 > that will change the line baud rate according to the `CONNECT xxxx'
 > message from the modem?

Don't bother.  Set up the T2500 to use flow control and then lock the
interface at a set speed, perferably 19200.  Grab FAS (current version is
2.08) and use it instead of the default ASY driver.  Then program the T2500 to
use RTS/STS flow control (S58=1) and lock the interface speed (S51=5, S66=1).
You can select outgoing dial speeds in your Systems file by doing something
like:

  host Any ACU 19200 ...
  host96 Any ACU9600 19200 ...
  host24 Any ACU2400 19200 ...

The interface speed will be locked at 19200 but the connect speed is set by
the ACUnnn number.  The entries in Devices look like:

  Direct ttyf0 - Any direct \D
  ACU ttyf0 - 19200 telebit \T
  ACU9600 ttyf0 - 19200 telebit9600 \T
  ACU2400 ttyf0 - 19200 telebit2400 \T
  ACU1200 ttyf0 - 19200 telebit1200 \T

The Dialers entris that support these rates will be something like:

  # The direct entry supports direct access to the modem.  It is used by the
  # Direct devices entry.
  direct	=,-,	"" \M\pAT\r\c OK\r ATQ0V1\r\c OK\r \c
  telebit	=,-,	"" \M\pAT\r\c OK\r ATQ0V1S50=255\r\c OK\r ATDT\T\r\m\c CONNECT

  # The following dialers are used to force an outgoing connection at a
  # certain rate while still keeping the interface speed locked at another
  # rate.  This has been testing with a telebit T2500

  telebit9600	=,-,	"" \M\pAT\r\c OK\r ATQ0V1S50=6\r\c OK\r ATDT\T\r\m\c CONNECT
  telebit2400	=,-,	"" \M\pAT\r\c OK\r ATQ0V1S50=3\r\c OK\r ATDT\T\r\m\c CONNECT
  telebit1200	=,-,	"" \M\pAT\r\c OK\r ATQ0V1S50=2\r\c OK\r ATDT\T\r\m\c CONNECT


Good luck.

// marc
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