Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!accuvax.nwu.edu!nucsrl!telecom-request From: Dave Levenson Newsgroups: comp.dcom.telecom Subject: Re: Centrex, Everyone? Message-ID: <3722@accuvax.nwu.edu> Date: 10 Feb 90 05:12:09 GMT Sender: news@accuvax.nwu.edu Organization: Westmark, Inc., Warren, NJ, USA Lines: 41 Approved: Telecom@eecs.nwu.edu X-Submissions-To: telecom@eecs.nwu.edu X-Administrivia-To: telecom-request@eecs.nwu.edu X-Telecom-Digest: Volume 10, Issue 90, message 3 of 9 Our moderator writes, as part of the on-going discussion of PBX vs Centrex service: > ... Did you know Amoco Oil > Company, which is headquartered here, gets billings from Illinois Bell > for about one million dollars *per month* on local service and > equipment only? Its an 8000-line Centrex; the CO (Chicago-Lakeshore) > is in the third sub-basement of the Amoco Building itself. PT] I couldn't help noticing the obvious irony. If the CO is on the customer's premises, the difference between Centrex and PBX becomes more blurred than ever! Centrex is recommended for short-term service. PBX is less expensive in the long term, as it eventually gets amortized. My residential service consists of two trunks feeding an 8-station key system. The monthly charge for an 8-line centrex would probably pay for the key system in six months or so; my KSU has been in service for six years. As for feature-phones, the ISDN Centrex will someday be and answer to that one. Anybody know what it'll cost? Dave Levenson Voice: (201 | 908) 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 [Moderator's Note: Strictly speaking, the CO is not on the customer's premises. It is in the same building as the customer's premises, and Illinois Bell rents space from the customer for the CO. While Amoco is the main tenant in the Amoco Building, they only occupy about sixty percent of the total floor space; the other forty percent being occupied by a variety of tenants, including of course, IBT. The CO in the basement serves the entire building, plus a couple other office buildings in the vicinity. 312-856 is mostly Amoco; 856-0xxx and 9xxx are other tenants in the building. Plus the CO has a couple other prefixes in it; I forget which ones off hand. PT]