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From: wrp@biochsn.acc.Virginia.EDU (William R. Pearson)
Newsgroups: comp.dcom.telecom
Subject: Re: Long Distance Piracy Jolts Phone Bills
Message-ID: <11026@accuvax.nwu.edu>
Date: 17 Aug 90 18:33:14 GMT
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X-Telecom-Digest: Volume 10, Issue 580, Message 4 of 13


] I would really be interested in knowing what kind of brain-dead PBX
] could be used to serve a large enough operation where one could hope
] to get away with this. ...

] Also, virtually all PBXes, even down to the lowly Panasonics, identify
] to a station whether the call is from the inside or outside via
] distinctive ringing. ...

] In short, it is just about impossible to masquerade as an inside call

	Here at the U. Virginia we have a ROLM system.  My phone has a
distinctive ring from the outside.  But if I fail to pick up the
phone, the call is transfered to my secretary.  She then calls me back
and transfers the call, and I have no idea where it came from.
Perhaps if she had simply caused my phone to ring again with the
outside call, its ringing would be distinctive, but since she calls
me, announces the call, and then connects it, I do not know whether
the caller is inside or outside.


Bill Pearson