[Info-vax] modems and cxy08

[Steven Schweda]

starchild wrote:

> I have a VAX 4000-500 VMS 7.3 with a cxy08 with ckermit 8.0.201.
> I have connected to the cxy08 the bc19n-12 cable which is connected to
> 2 multitech modems.
> I'm trying to use 1 for out going and the other for incoming.

   Two phone lines or one?  If one, then why use two modems?

> Problem is when I try to dial out using kermit I get a no response
> from modem. When I do a
> show comm CTS/DTR/RTS is on.

      SET HOST /DTE TTxy

and try to talk to it directly.

>  There are no switches on the multitech
> except the on/off switch.

   It doesn't need any.  It has a serial port and commands.

>  I thought this would be a straight forward
> run.

   It's more straight-forward if you're facing in the right
direction.

>  Connect the modems run kermit and be
> done.

   You left out the part where you configure the modem.

>   According to the net the cxy08 has modem control, so I
> shouldnot need null modems or
> anything else.

   Modem control and null modems have little to do with each
other.  An arm of a BC19N-xx should be ideal for a modem,
however.

>  So what am i doing wrong.

   Knowing practically nothing about what you've done, it's
hard to say.  You might start by identifying the modem
(MultiTech did make more than one kind), and trying to find a
manual for it which would explain the "AT" command set (unless
you have a really old, obscure modem, anyway).  You might
start with a few Carriage Returns and then, say,

      ATE1Q0V1

   My MT5600ZDX is connected to a terminal server, so I use
SET HOST /LAT to talk to it directly, but around here:

ALP $ set host /lat modem
%LAT-S-CONNECTED, session to MODEM on node SP2 established
%LAT-I-TODISCON, type ^\ to disconnect the session
OK

You can't see where I typed "ATE1Q0V1", because the modem's
configured to wake up with Echo off ("E0").  "ATE1Q0V1" turns
Echo on, Quiet off (so you can see its responses), and Verbose
on (so you get messages wordier than numeric codes).  The
same thing again, and you see more:

ATE1Q0V1
OK

   For more info than you want, for example, try "AT&V":

at&v
ACTIVE PROFILE:
B1 E1 L1 M1 N1 Q0 T V1 W1 X4 Y0 &C1 &D3 &G0 &J0 &K3 &Q5 &R1 &S1 &T5
&X0 &Y0
S00:007 S01:000 S02:043 S03:013 S04:010 S05:008 S06:002 S07:050
S08:002 S09:006
S10:014 S11:095 S12:050 S18:000 S25:005 S26:001 S36:007 S37:000
S38:020 S46:138
S48:007 S95:000

OK

   If a modem is not configured with "E0Q1", then when it's
disturbed it may speak, and the system where it's connected
tends to thing that it's trying to log in, usually without
success, but the potentially endless exchange can fill your
error logs.  The ideal configuration depends on the local
circumstances.