Path: utzoo!telecom-request Date: Fri, 5 Apr 91 13:26:52 CST From: Al L Varney Newsgroups: comp.dcom.telecom Subject: Re: Caller ID Hearings in California Message-ID: Organization: AT&T Bell Laboratories 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 273, Message 5 of 9 Lines: 47 To block presentation of calling number, > Jim Gottlieb writes: >> Dial *67 from almost any Pacific Bell ESS-served line and you will >> hear a confirmation tone followed by dial tone. And yazz@prodnet.la.locus.com (Bob Yazz) responds: > On my DMS-100 line in San Diego, I get a CPC disconnect and the > DMS-100 "catch-all" recording -- "We're sorry, your call did not go > thru". A couple of times the equipment got confused .... But ... Jim specifically said "ESS-served" line. Strictly speaking, ESS(tm) is a Trademark of AT&T, and it is unlikely the DMS-100 can legally be called an "ESS". On the other hand, Jim probably meant an "Electronic Switch-served" line or a SPC (Stored Program Control) switch. > Could be because I'm on DMS-100 or because I'm in San Diego and the > CLID trials are planned for LA and SF. All of the above; the DMS probably doesn't have the right "BCS release" to support the feature, and you are not located in one of the two "test" areas. Even with the right software, the assignment of "*67" to a feature is office-specific. It should not confuse the equipment in any case.... Two other comments: Someone asked if No. 1 ESS(tm) could do CallerID. No. Nor does it speak SS7 (it will do CCIS6 however). Nor does it do Cancel Call Waiting. Note that SS7 (or CCIS6) is only needed to make CallerID work between switches. CLASS capabilities within a single switch are certainly possible in an "island" environment, sort of like single-switch ISDN. There are several non-SS7 single-switch CLASS offices in small single-switch communities. Al Varney, AT&T Network Systems Disclaimer: I don't speak for AT&T or any part thereof, nor am I part of the "Trademark" compliance group.