SUMMARY: modem won't echo "OK" (or anything else)

From: Dan Penrod (penrod@scratchy.wcnewmedia.com)
Date: Wed Jul 31 1996 - 12:10:01 CDT


Hey Managers:

My original query started out like this...

>I have a modem hanging off of the first serial port (Port A)
>of Sun Ultra 1, running Solaris 2.5. The modem is a MultiTech
>MultiModem Z/DX.
>
>When I "tip" to the port I get the expected "connected" prompt,
>however...
>1. when I type "AT" I can't see it, and...
>2. when I hit <RET> I don't get an "OK" back.

I got a lot of different advice... all the stuff you see in a
modem FAQ sheet... basically all things I'd thought of or tried.
In the end, one person suggested trying something I hadn't
thought of... The suggestion came from Steve Turgeion
(steve_turgeon@ppc-191.putnaminv.com). This is what he said...

> Take a paper clip and short pins 2 and 3 of the modem cable
> together. Tip to the port and type. You should see what you
> have typed. If that doesn't work, short at the Ultra port.
> (this will eliminate the cable) If that still doesn't work, then
> I think that the port is fried. Try configuring port B and run
> the same test. Steve

I tried this and didn't see any character stream. I called Sun
and told them. The machine is new and under warrenty. They sent
a new motherboard. It's working fine now.

Thanks for all the help to the following Sun managers:
lemercie@dr.gdf.fr (LEMERCIER Laurent)
otty@tgivan.wimsey.bc.ca (Dotty Pon)
aub@ide.com
Tom Southerland <tom@merlin.Access.COM>
celeste@celestial.stokely.com (Celeste Stokely)
Glenn Satchell <glenn@ind.tansu.com.au>
miked@fujitsu.com.au (Mike Daffey)
Tony Ching-Tung Wu <tonywu@transend.com.tw>
Kevin Inscoe (CRC-LSG x2082) <kpi@hobbes.crc.com>
steve_turgeon@ppc-191.putnaminv.com

-dan

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| Dan Penrod - Unix Network Administrator             |
| Image Technologies - World Color New Media          |
| 12425 28th St. N., St. Petersburg, FL 33716         |
| vox:813/573-5268 fax:573-0431 penrod@wcnewmedia.com |
| penrod@wcnewmedia.com                               |
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