Path: utzoo!utgpu!jarvis.csri.toronto.edu!rutgers!bellcore!texbell!vector!telecom-gateway From: jbh%mibte.UUCP@mailgw.cc.umich.edu (James Harvey) Newsgroups: comp.dcom.telecom Subject: Re: Jack specifications Message-ID: Date: 23 May 89 12:27:40 GMT Sender: news@vector.Dallas.TX.US Organization: Michigan Bell Telephone Company Lines: 41 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 175, message 6 of 7 In article , westmark!dave@rutgers. edu (Dave Levenson) writes: > In article , ucla-an!denwa!bongo! > julian@seas.ucla.edu (julian macassey) writes: >> OK, let's start with the RJ-21X, because it is not "one of those >> rectangular connectors"... >> An RJ21X is a 66 block that is used as the "Demarcation Point". > Actually, the code RJ-21X refers to the "Amphonol" 50-pin miniature > ribbon connector, and not to the "66-block" with which it is often > associated. In a "by the rules" RJ-21X installation, the customer > equipment is required to be attached by an "Amphonol" which mates > with one supplied by the telco. This is true. The customer is NOT supposed to use the punchdown terminals. > In the real world, the RJ-21X provided by most telcos is connected > to a 66-block which contains the demarcation straps described in > Julian's posting, and is then connected the service-entrance cables > at the station-protector. A lot of premises equiment installers > will punch down wire pairs on the telco 66-block, and ignore the > "Amphonol" provided. I have one customer, however, where the > 66-block is under lock and key, and the RJ-21X is the only connector > accessible to the customer. (The installers promptly installed > their own 66-block and cabled it with an "Amphenol" to the '21X!) This is the standard way of dealing with the Amphenhol (why do people insist on calling it a 50 pin Centronics?) connector. -- Jim Harvey | "Ask not for whom the bell Michigan Bell Telephone | tolls and you will only pay 29777 Telegraph | Station-to-Station rates." Southfield, Mich. 48034 | ulysses!gamma!mibte!jbh