Path: utzoo!attcan!sobmips!uunet!seismo!sundc!newstop!sun-barr!apple!usc!samsung!rex!wuarchive!texbell!vector!telecom-gateway From: westmark!dave@uunet.uu.net (Dave Levenson) Newsgroups: comp.dcom.telecom Subject: Re: AT&T's ACUS Service Message-ID: Date: 16 Nov 89 05:40:47 GMT Sender: news@vector.Dallas.TX.US Organization: Westmark, Inc., Warren, NJ, USA Lines: 22 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 515, message 5 of 6 In article , klb@lzaz.att.com (Kevin Blatter) writes: ... > Unless the PBX is connected to the CO via ISDN lines, there is no way > for the PBX to know if a call is completed or not. Not necessarily true. Answer supervision on outgoing trunks is available from most local central offices including #5 crossbar, 1ESS, 1AESS, and 5ESS. It takes the form of a trunk battery reversal when the far end answers. It is an extra-cost feature, at least according to NJ Bell's tariffs, but it is available if you buy it. Some PBX equipment is designed to use this information if it's provided. Mitel PBX equipment can use it to decide whether or not to generate an SMDR record for an outgoing call. I don't know about the Rolm switch used to provide ACUS. Dave Levenson Voice: (201) 647 0900 Westmark, Inc. Internet: dave@westmark.uu.net Warren, NJ, USA UUCP: {uunet | rutgers | att}!westmark!dave [The Man in the Mooney] AT&T Mail: !westmark!dave