Paradyne 2144 Leaflet

This guide provides the basic information required to 
install the Comtest Model 2144 POTS/ISDN Splitter 
Shelf in a Central Office location.   

The 2144 requires 3U (5.25 inches) of rack space and 
is centre mounted.  The shelf is supplied with 
mounting brackets and hardware to allow installation 
in a 19 inch or 23 inch rack.  By repositioning the mounting brackets, the shelf can be installed with the 
connectors front or rear facing.  With the connectors facing the rear, a depth of 10 inches would be sufficient to 
mount the shelf with cables installed. 

To comply with the Network Equipment Building Systems (NEBS) requirements, a suitable ground must be 
provided.  The 2144 can be grounded to the rack through the mounting brackets, eliminating the need for 
separate a ground wire. 

The 2144 Splitter Shelf cabling configurations will vary depending on installation locations and the number of 
lines supported by the DSLAM.  However, the physical interface to the back plane connectors are standard 50-
pin telephone-type receptacle connectors.  Each Splitter card uses 24 pairs of the 25 pairs available on each 
50-pin connector.  

 

The DSL Interface connectors (J1, J4, J7, J10, J13, & J16) and the LOOP Interface connectors (J2, J5, J8, J11, 
J14, & J17) are oriented so that the mating plug left-angled cable head will dress out to the left side of the shelf.  
Whereas, the PSTN Interface connectors (J3, J6, J9, J12, J15, & J18) are oriented so that the mating plug right-
angled cable head will dress out to the right side of the shelf. 

As view from the rear of the shelf: 

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ADSL signals to and from the DSLAM enter the 2144 splitter shelf using the left most telephone 
connectors, designated “DSL Interface”.  

Copyright © 2001, 

Comtest Advanced Networks