home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!usc!sol.ctr.columbia.edu!lll-winken!telecom-request
- From: mmo2273@aw2.fsl.ca.boeing.com (Michael M. O'Dorney)
- Newsgroups: comp.dcom.telecom
- Subject: Pulse Dialing Through to a PBX Extension
- Message-ID: <telecom12.676.3@eecs.nwu.edu>
- Date: 1 Sep 92 15:51:36 GMT
- Sender: Telecom@eecs.nwu.edu
- Organization: TELECOM Digest
- Lines: 35
- Approved: Telecom@eecs.nwu.edu
- X-Submissions-To: telecom@eecs.nwu.edu
- X-Administrivia-To: telecom-request@eecs.nwu.edu
- X-Telecom-Digest: Volume 12, Issue 676, Message 3 of 8
-
- In 1967, I called Columbia University (New York City) from Buffalo. I
- was using a rotary dial phone. I called a conventional ten digit
- number (212-xxx-xxxx) and received a recording to dial an extension
- and then a dial tone. I dialed the extension (I was answering a job
- and had the extension number) and was connected to the extension.
-
- This was either the biomedical engineering department or the
- electrical engineering department number. Does anyone know how this
- was done, how did the system pick up dial pulses reliably, was this
- Bell hardware or third party (or home-brew) by the school's
- department. I later heard that this system was called "direct inward
- dialing" and not "centrex", although later on, centrex and DID were
- used interchangeably in marketing hype from NYTelephone. (I do not
- know when "centrex" as a term was created.)
-
-
- Michael M. O'Dorney | Voice: 206-237-1274 (work)
- Boeing Commercial Airplanes |
- P.O. Box 3707, M/S 96-02 | Internet: mmo2273%aw2@orcas.fsl.ca.boeing.com
- Seattle WA 98124-2207 | Boeing net: mmo2273@aw2
-
-
- [Moderator's Note: I'll tell you who else used to accept dial pulses
- through their WATS extender: United Airlines on their Unitel network,
- a system which connects all UAL facilities across the continent. I
- have no idea how they could do it, but you could call into the WATS
- extender (which by the way went with *no password required* for
- several years) and rotary dial all over the immediate, local area
- network of United. Pulsing could not be done throughout the entire
- Unitel network however; tones were required to hop off-net and
- continue dialing through a remote PBX to an outside line in a distant
- city. UAL finally wised up, getting rid of progressive dialing in lieu
- of 'enter only the end destination number, we will route it' and also
- requiring passwords. PAT]
-