Path: utzoo!attcan!uunet!husc6!bloom-beacon!gatech!ncar!ames!pacbell!att!mtunx!westmark!dave
From: dave@westmark.UUCP (Dave Levenson)
Newsgroups: comp.dcom.modems
Subject: Re: Limiting modems to local calls
Message-ID: <215@westmark.UUCP>
Date: 12 Jun 88 01:40:53 GMT
References: <4539@b-tech.UUCP>
Organization: Westmark, Inc., Warren, NJ, USA
Lines: 24

In article <4539@b-tech.UUCP>, zeeff@b-tech.UUCP (Jon Zeeff) writes:
> I'd like to limit outgoing calls from a modem to local ones.  Are there
> modems or add on boxes that do this?  I tried the telephone company, but
> they claim that there is no way to prevent LD calls.

There are after-market toll-restrictors (sometimes called
toll-diverters) that go between the C.O. line and your voice
terminal equipment (including auto-dialing modems).  One such device
is called Telephone Sentinel.  It is manufactured by
Telecommunications Technology Corporation, 6663 Old Dominion Drive,
McLean, VA  22101.  This is a little plastic box with male and
female modular jacks.  You program it with a combination of internal
dip switches and touch-tone commands from an attached telephone set.
You can block 1+, selected area codes, selected exchange prefixes,
or selected telephone numbers.  (Not an unlimited number of each,
but it has a fair amount of memory.)  It is powered by an internal
ni-cad battery which it can re-charge from the phone line, in some
cases.

-- 
Dave Levenson
Westmark, Inc.		The Man in the Mooney
Warren, NJ USA
{rutgers | clyde | att | ihnp4}!westmark!dave