Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!tut.cis.ohio-state.edu!cs.utexas.edu!uunet!netsys!vector!telecom-gateway From: julian%bongo.uucp@eecs.nwu.edu (julian macassey) Newsgroups: comp.dcom.telecom Subject: Re: ESS overloading Message-ID: Date: 2 Jul 89 00:48:00 GMT Sender: news@vector.Dallas.TX.US Organization: The Hole in the Wall Hollywood CA U.S.A. Lines: 30 Approved: telecom-request@vector.dallas.tx.us X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@vector.dallas.tx.us X-TELECOM-Digest: volume 9, issue 221, message 3 of 7 In article , jsol@bu-cs.bu.edu writes: > > You can't easily distinguish between a DMS and an ESS 5. They are > largely the same technology (hooray for competetion). You pick up the > phone, sometimes you hear clicks and sometimes you don't. I think with > ESS5 you always hear clicks, so if you don't get a click or two before > your "goooooooooooo" (dialtone), then you are probably on a small DMS > office. > --jsol Here is a way to spot a DMS. Using a Touch Tone phone, get dialtone and dial one digit. Immediately after you take your finger off the dial pad, you will hear a very short burst of dialtone before silence. This means the switch is a DMS. Certainly works in Southern California. So the sequence is: Dialtone, Touch Tone, dialtone, silence. A X-Bar or AT&T ESS will have the following sequence: Dialtone, Touch Tone, silence. There are of course other quirks that identify a DMS, but this is a quick, certain, cheap and dirty test. Yours -- Julian Macassey, n6are julian@bongo ucla-an!denwa!bongo!julian n6are@k6iyk (Packet Radio) n6are.ampr.org [44.16.0.81] voice (213) 653-4495