Specifications

Chapter 1 Installation
1-7
CSU to Access Bank DA-15P(male) to RJ48C P01519-XX
where XX is length in feet in multiples of 10 feet
Tip and Ring Cabling
The access Bank has a 25-pair female telephony connector (labeled tip & ring) located as shown in fig.
2.1. To connect to it, use a 25 pair cable with a Standard "D" Style 50 Pin Telephone Wiring Connector
with RJ-21X wiring jack (punch down block with 25 pair modular female connector in the side.)
Pin Location Function
26 Tip Channel 1
1 Ring Channel 1
27 Tip Channel 2
2 Ring Channel 2
. .
. .
49 Tip Channel 24
24 Ring Channel 24
50 Tip Channel 25
25 Ring Channel 25
Pair 25 Options
When the Access Bank Remote Monitor board is installed on the LIU, pair 25 of the tip and ring
connector has two selectable functions. This pair can be used as alarm contacts, or to connect to a modem.
To use pair 25 as alarm contacts:
1. Turn the Normal/Remote switch to the Normal position.
2. Turn the Normal/Alarm Cutoff switch to the Normal position.
3. Connect pair 25 to an alarm circuit.
To use pair 25 to connect the ABRM modem to :
1. Turn the Normal/Remote switch to the Remote position.
2. The ABRM modem is now connected to pair 25, which must be connected to a properly-configured
POTS (providing -48 volts and ringing) on an FXS line on the AB-24 (from tip and ring channels 1
through 24). Calls to and from the modem will then be carried on the selected T1 carrier.