[comp.unix.xenix.sco] Telebit Modem and SCO Xenix 2.3.2

tkevans@fallst.UUCP (Tim Evans) (08/31/90)

Can someone send appropriate 'gettydefs' entries for enabling
incoming calls on a Telebit T2500.  Default to 9600 with
cycling to other speeds.  Also, an approriate entry for 
'ttys' and correct S Register settings for the modem (and
for the T2500 calling it)?

The thing answers the phone OK, gives a login prompt, then
puts out nothing but garbage.

Thanks.
-- 
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INTERNET:	tkevans%fallst@wb3ffv.ampr.org
Tim Evans	2201 Brookhaven Ct, Fallston, MD 21047

norsk@sequent.UUCP (Doug Thompson) (09/05/90)

In article <1719@fallst.UUCP> tkevans@fallst.UUCP (Tim Evans) writes:
>Can someone send appropriate 'gettydefs' entries for enabling
>incoming calls on a Telebit T2500.  Default to 9600 with
>cycling to other speeds.  Also, an approriate entry for 
>'ttys' and correct S Register settings for the modem (and
>for the T2500 calling it)?
>
>The thing answers the phone OK, gives a login prompt, then
>puts out nothing but garbage.
>

Same thing happens with a T1000 modem, haven't needed to use it
for some time and always meant to get back to it and solve it.
I'd like some input on this as well

-- 
Douglas Thompson		UUCP: ..{tektronix,ogicse,uunet}!sequent!norsk
				Internet:	norsk@sequent.com
"The scientist builds to learn; the engineer learns in order to build."  
Fred Brooks

bill@wgc386.mv.com (William Gibbs) (09/06/90)

In <1719@fallst.UUCP> tkevans@fallst.UUCP (Tim Evans) writes:

>Can someone send appropriate 'gettydefs' entries for enabling
>incoming calls on a Telebit T2500.  Default to 9600 with
>cycling to other speeds.  Also, an approriate entry for 
>'ttys' and correct S Register settings for the modem (and
>for the T2500 calling it)?

>The thing answers the phone OK, gives a login prompt, then
>puts out nothing but garbage.

I'm getting the same problem with Xenix 2.3.2 and a T1000.  Please post
responses.  Thanks.
-- 
William Gibbs                                     bill@wgc386.mv.com
34G Bay Ridge Drive
Nashua, NH 03062-4723             
(603) 888-8313                   {decvax | harvard}!zinn!wgc386!bill         

rohit@dmdev.UUCP (Rohit Mehrotra) (09/06/90)

References: <1719@fallst.UUCP> <1990Sep5.225421.10146@wgc386.mv.com>

In article <1990Sep5.225421.10146@wgc386.mv.com>, bill@wgc386.mv.com (William Gibbs) writes:
> In <1719@fallst.UUCP> tkevans@fallst.UUCP (Tim Evans) writes:
> 
> >Can someone send appropriate 'gettydefs' entries for enabling
> >incoming calls on a Telebit T2500.  Default to 9600 with
> >cycling to other speeds.  Also, an approriate entry for 
> >'ttys' and correct S Register settings for the modem (and
> >for the T2500 calling it)?

         Lock the speed at which the modem communicates with the port,
	 and then let the telebit handle the speed toggling while
	 communicating with the other modem. 
         Settings for my T2500 are
			 
	 S52=1 S54=3 S58=0 S64=1 S66=1 S68=3
	 S111=30 S110=1 S11=50 S51=5 S130=5 S131=1
-- 
Rohit Mehrotra
Fleet Credit Corporation
8325 NW 53rd St, Miami, Fl 33166.
E-MAIL Address uunet!dmdev!rohit VOICE 1-(305)-477-0390 Ext 469

mjohn@king..citib (Michael Johnston) (09/07/90)

In article <158@dmdev.UUCP> rohit@dmdev.UUCP (Rohit Mehrotra) writes:
>References: <1719@fallst.UUCP> <1990Sep5.225421.10146@wgc386.mv.com>
>
>In article <1990Sep5.225421.10146@wgc386.mv.com>, bill@wgc386.mv.com (William Gibbs) writes:
>> In <1719@fallst.UUCP> tkevans@fallst.UUCP (Tim Evans) writes:
>> 
>> >Can someone send appropriate 'gettydefs' entries for enabling
>> >incoming calls on a Telebit T2500.  Default to 9600 with
>> >cycling to other speeds.  Also, an approriate entry for 
>> >'ttys' and correct S Register settings for the modem (and
>> >for the T2500 calling it)?
>
>         Lock the speed at which the modem communicates with the port,
>	 and then let the telebit handle the speed toggling while
>	 communicating with the other modem. 

This is an OK setup where the modem , cable and, serial port are
correctly matched but will be a disaster at low speed when the
hardware handshaking fails. I don't recommend locking the interface
speed on a Telebit. Reorder the gettydefs to cycle baud rates from
19.2kbps down. It is far more reliable.



--
Michael R. Johnston, Mgr.           Internet: mjohn@citib.com
USCPG , Treasury Systems            UUCP: uunet!uupsi!bank!mjohn
Citicorp, NA                        (718) 248-5373

shwake@raysnec.UUCP (Ray Shwake) (09/07/90)

>In article <1719@fallst.UUCP> tkevans@fallst.UUCP (Tim Evans) writes:
>>Can someone send appropriate 'gettydefs' entries for enabling
>>incoming calls on a Telebit T2500.  Default to 9600 with
>>cycling to other speeds.  Also, an approriate entry for 
>>'ttys' and correct S Register settings for the modem (and
>>for the T2500 calling it)?

I suggest you abandon the idea of "cycling" altogether. Set your interface
at 9600 and "lock" the speed (S66=1). Let your Telebit speed-adjust with
its counterpart. My TB+ worked like a champ under Xenix 2.3.2, still works
(unmodified) under SCO ODT, whether interfacing to my NEWS feed (running
TB+ as well) or to my home box (2400 baud Hayes-compatible).

chip@chinacat.Unicom.COM (Chip Rosenthal) (09/08/90)

>[locking the local DTE speed] is an OK setup where the modem, cable and
>serial port are correctly matched but will be a disaster at low speed when
>the hardware handshaking fails. I don't recommend locking the interface
>speed on a Telebit.

Wait a second!  That's like saying, "Hard disks are nice until the
controller fails.  Better use floppies."  Running with a locked speed to
the local DTE is much nicer.  But you obviously do need a working flow
control to use this(*).

If your serial port and/or drivers are broken, indeed, don't try to lock
the interface.  A couple of years back, broken handshaking seemed to be
the rule rather than the exception, so it's no wonder both Telebit and
SCO recommend running at a matching speed rather than locking it down.

Saying "don't do it" as a blanket statement seems an unfair generalization.
Is there some point I'm missing?

(*) Unless you are running nothing but uucico to other PEP modems, in
    which case you can probably run without any flow control.

-- 
Chip Rosenthal  <chip@chinacat.Unicom.COM>
Unicom Systems Development, 512-482-8260 
Our motto is:  We never say, "But it works with DOS."

bob@consult.UUCP (Bob Willey) (09/11/90)

In article <62@raysnec.UUCP> shwake@raysnec.UUCP (Ray Shwake) writes:
>>In article <1719@fallst.UUCP> tkevans@fallst.UUCP (Tim Evans) writes:
>>>Can someone send appropriate 'gettydefs' entries for enabling
>>>incoming calls on a Telebit T2500.  Default to 9600 with
>>>cycling to other speeds.  Also, an approriate entry for 
>>>'ttys' and correct S Register settings for the modem (and
>>>for the T2500 calling it)?
>
>I suggest you abandon the idea of "cycling" altogether. Set your interface
>at 9600 and "lock" the speed (S66=1). Let your Telebit speed-adjust with
>its counterpart. My TB+ worked like a champ under Xenix 2.3.2, still works
>(unmodified) under SCO ODT, whether interfacing to my NEWS feed (running
>TB+ as well) or to my home box (2400 baud Hayes-compatible).


Well there appears to be many ways to skin this cat.
We had problems when trying to open "locked", but has worked like
a champ with cycled.  We have a Telebit T18PC, and connect to several
sites with Telebit +, and about 15 sites with 2400 Hayes compatibles,
and seem to be running fine, making daily connects to all sites.


There may be something wrong with the above, but it has been
working fine for about 6 months now.

Any comments are welcome (well almost any)

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