Phone Systems

Previous Thread
Next Thread
Print Thread
Rate Thread
extending a dmarc
#446469 08/22/07 07:01 PM
Joined: Aug 2007
Posts: 2
Member
OP Offline
Member
Joined: Aug 2007
Posts: 2
I have a question I have been asked to extend 8 lines from the dmarc onto a rj31x and 2 of the lines onto a rj21x.
I am a little confused with the rj21x. As far as I knew this is a amphenol connector. I have never done an amphenol with anything except a 25 pair.
Thx for any help

EMP & Lightning Home Surge Protection
EMP - Click Here!
Re: extending a dmarc
#446470 08/22/07 07:04 PM
Joined: Dec 2002
Posts: 9,389
Member
*****
Offline
Member
*****
Joined: Dec 2002
Posts: 9,389
I think you need to find a qualified tech if you do not know what these are.


Jeff Moss

Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
Re: extending a dmarc
#446471 08/22/07 07:10 PM
Joined: Aug 2007
Posts: 2
Member
OP Offline
Member
Joined: Aug 2007
Posts: 2
I know what both of them are. I just am unsure about using an amphenol with only 6 pairs. So I was asking if perhaps there was something else that could be used as a rj21x.

Re: extending a dmarc
#446472 08/22/07 07:13 PM
Joined: Dec 2002
Posts: 9,389
Member
*****
Offline
Member
*****
Joined: Dec 2002
Posts: 9,389
You do not have to use the amphenol. You can punch your cables down to a block and then cross connect them to the second set of pins on the RJ21X block.


Jeff Moss

Moss Communications
Computer Repair-Networking-Cabling
MBSWWYPBX, JGAE
Re: extending a dmarc
#446473 08/22/07 07:22 PM
Joined: Nov 2001
Posts: 1,640
Moderator-NEC
*****
Offline
Moderator-NEC
*****
Joined: Nov 2001
Posts: 1,640
Some People have been known to call a 66 block with an orange hinged cover an RJ21X regardless of if it has the amp connector or not.

It may be the person asking you what you need is confused. I would assume 2 of the lines would terminate on 2 RJ31Xs for primary and secondary alarm lines and the additional lines punched down on a block.

I personally like to replace the bridging clips with 2 pair (to and from the RJ32X) and the phone equipment would hook up to the right side and use bridging clips for the Non-RJ31X lines.


Welcome to the board

Re: extending a dmarc
#446474 08/22/07 08:30 PM
Joined: Feb 2005
Posts: 12,257
Member
***
Online Content
Member
***
Joined: Feb 2005
Posts: 12,257
An RJ21X is usually a split (50 pair) 66M block and bracket. There is an Amp connector mounted to the right side of the bracket which is factory wired to the right half of the block. You wire to the left side and install bridging clips to provide continuity to the Amphenol. The bridging clips provide a means to test the pairs.

A more current version of this is a 25 pair Krone block with Amphenol.

I guess technically an RJ21X can be an Amphenol connector by itself but that is not usually done. Also, as has been pointed out a split 66M block with bridging clips and no Amphenol is often called an RJ-21X but technically it is not. I have had a few discussions with Verizon about that since they sometimes like to provide an RJ-21X that way.

That said, there are plenty of such RJ-21Xs with as little as one pair. To answer your question you would simply cut down your 6 pairs in order down the left side of the block.

-Hal


CALIFORNIA PROPOSITION 65 WARNING: Some comments made by me are known to the State of California to cause irreversible brain damage and serious mental disorders leading to confinement.
Re: extending a dmarc
#446475 08/25/07 05:02 AM
Joined: Oct 2005
Posts: 1,078
Member
Offline
Member
Joined: Oct 2005
Posts: 1,078
back in the day when you ordered a rj21x theyed stack your numbers sequentially so you could plug directly into you pbx and you'd have instant phone system perfect world kinda thing ( you'd wind up cross connecting from the block anyway
because how many pbxs pinned out that way ?) in mass you used to put a orange vendor sticker on the wall were you wanted it and new england tels special services guy would do his best to install it 100 feet away from that sticker don't know why we bothered...

Re: extending a dmarc
#446476 08/25/07 05:14 AM
Joined: Oct 2005
Posts: 1,078
Member
Offline
Member
Joined: Oct 2005
Posts: 1,078
Quote
Originally posted by goofygrl:
I have a question I have been asked to extend 8 lines from the dmarc onto a rj31x and 2 of the lines onto a rj21x.
I am a little confused with the rj21x. As far as I knew this is a amphenol connector. I have never done an amphenol with anything except a 25 pair.
Thx for any help
so they want you to install 8 alarm jacks and punch 2 numbers on a spilt block what for?seems like all 10 numbers should hit the block first don't you think?
what part of ma are you from?


Moderated by  Professor Shadow, Silversam 

Link Copied to Clipboard
Forum Search
Most Recent 5 Post
7100 Lan Printer Error
by RM SYSTEMS - 09/28/20 02:27 PM
Caller wait list
by Hofman telekom - 09/28/20 11:27 AM
TDA50G power consumption
by kenc - 09/27/20 01:23 PM
Who's Online Now
32 members (Silversam, MooreTel, Yoda, hitechcomm, RATHER BE FISHING, nortelvoip, ChrisRR, dexman, justbill, metelcom, aweaver, LenShustek, BrianS, nfcphoneman, JBean3329, hbiss, Meyery2k, Ruben, gelehu, Touch Tone Tommy, Telesystems, EV607797, sfletcher, Bob3470, Carl Navarro, Professor Shadow, jknichols, BobRobert, Skunky, vicbob, jab1780, Hofman telekom), 631 guests, and 48 robots.
Key: Admin, Global Mod, Mod
Popular Topics (Views)
Forum Statistics
Forums94
Topics93,975
Posts637,365
Members49,356
Most Online5,661
May 23rd, 2018
Today's Birthdays
sandi ann
Newest Members
xware, Adam19871, tmr-afmk, Big Alan, simsh
49355 Registered Users
Get Tech Support Now! Click the banner below
Get Tech Support Now!
Top Posters (30 Days)
dexman 34
Ruben 13
hbiss 13
teleco 10
Bluewater Sailing
https://www.patreon.com/bePatron?u=5256033
EMP Shield for Commercial - Home & Vehicle
Use Coupon code SAVE - Click Here!
Sold AD
Servpro Ventura 24-Hour Emergency Service
Free Estimates call us now 24Hours
Contact Us | Telephone System Tech Support | Terms of Service

Sundance Communications is not affiliated with any of the above manufacturers.
©Copyright Sundance Communications 1998-2020
Trusted Partners