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Adding RJ48(?) female recepticle to AT&T T1 demarc--how to?

Posted on 2009-05-19
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Last Modified: 2012-05-07
I'm an individual with a T1 installation in process of being installed.  The Telco installed the T1 demarc. AT&T sent the Cisco 1841 router, 56k console, and cableling.  BUT, the cable connecting the modem (or CSU portion of it) to the demarc appears to be a Ethernet cable with two RJ45 connectors.  The demarc does not have a receptacle for it.  See attached photo of demarc box.  My research seems to indicate I need to add a RJ48x adapter.
How do I make the connection?  If I need to added a RJ48x, then what is the wiring schematic.
Editorially: it would have been a simple matter for the Telco to have installed it, it seems.

DEMARC.jpg
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Question by:T1-Novice
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lanboyo earned 500 total points
ID: 24427759
Well, to simplify things you should be able to disconnect the rj48  cable connecting to the terminal pins and plug in the straight thru connection to the router. Straight Ethernet cabling is fine.


If you really want to be a phone man, You can also strip an end off of an Ethernet cable and strip the orange and green pairs and screw them down as such...

Pinouts for T1/E1 Port (RJ-48C)


Pin1
Signal                       Ethernet             Westell T1 Dmarc      CO signal
1       RX (input)       Orange/White            CT                      tip
2       RX (input)       Orange                    CT1                      ring
3       -                       Green/White            -                        -
4       TX (output)       Blue                            CR                      tip
5       TX (output)       Blue/White            CR1                      ring
6       -                       Green                      -                        -
7       -                       Brown/White            -                        -
8       -                       Brown                    -                        -


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Expert Comment

by:lanboyo
ID: 24427761
Sorry Orange and Blue.
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Author Closing Comment

by:T1-Novice
ID: 31583242
Thanks, lanboyo. The LEC just showed-up to fix it.  But, your solution would have allowed me to make the fix, if they hadn't.
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