Path: utzoo!telecom-request Date: 4 Jun 91 18:08:26 GMT From: Tom Perrine Newsgroups: comp.dcom.telecom Subject: Re: Ringing Tones Around the World Reply-To: Tom Perrine Message-ID: Organization: Logicon, Inc., San Diego, California Sender: Telecom@eecs.nwu.edu Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 11, Issue 424, Message 4 of 8 Lines: 58 In article Andy Sherman writes: X-Telecom-Digest: Volume 11, Issue 420, Message 3 of 10 > In article , YSAR1111@vm1.yorku.ca (Rick > Broadhead) writes: > He might have hit a PBX or Centrex that uses a double ring to indicate > an outside call. Having moved around the Joisey locations of Bell > Labs quite a bit, I've encountered this feature in ESSX (a centrex), > Dimension, and System 85. Hmmm. Our brand-new ROLM 97xx signals with a double ring for an outside call, but the caller hears a single ring. Speaking of our brand-new system, several people have asked me (why me?) questions about DIDs. Is the following explanation correct: For an incoming (outside) call: The CO translates the dialed number and either: If it is POTS ("single-line home phone") routes it to the proper dedicated line. If it is a DID, discovers some kind of indication that this number should be routed to any of a set of trunks (our incoming trunks). The CO then picks any of the available incoming trunks (is this like a rotary?) and routes the call over that trunk to the PBX, passing the dialed number (destination) as well. The PBX then signals the instrument assigned that DID, and if it answers connects the trunk to the instrument. Notes: If all of the trunks are busy, the CO will signal busy to the caller, even if the instrument is on-hook, the PBX will never even see the call. When we get Caller-ID, if you have one of the ROLM 240XX phones, you will also see the phone number of the (outside) caller on the display. Am I even close? PS: I am also looking for any "stupid phonemail(tm) tricks" that anyone can suggest. I have a sense of humor that has been described as "strange, demented but never intentionally hostile". Something we can all laugh at here, as a way to make the new phone system a little less scary for some of our more telephobic employees. We have ROLM PhoneMail, Release 5.0. Tom Perrine (tep) |Internet: tep@tots.Logicon.COM |Voice: +1 619 597 7221 Logicon - T&TSD | UUCP: sun!suntan!tots!tep | or : +1 619 455 1330 P.O. Box 85158 |GENIE: T.PERRINE | FAX: +1 619 552 0729 San Diego CA 92138