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DEFINITY Enterprise Communications Server Release 6
Installation and Test for Multi-Carrier Cabinets
555-230-112
Issue 5
May 1998
Install and Wire Telephones and Other Equipment
Page 5-59BRI Terminating Resistor
5
Closet Mounted (110RA1-12)
The 110RA1-12 terminating resistor block is designed to mount in the
telecommunications wire closet. It consists of twelve 2-pair circuits and provides
the 100 Ohm termination used for ISDN-BRI circuits.
Figure 5-24
shows the wiring of the 110RA1-12. Three rows of 110D-4 connector
blocks are mounted on a printed wire board along with circuit resistors and
capacitors. The bottom row is designated as the input row and the top and
middle rows are designated as the output rows. The circuit assembly is mounted
on a standard 110A-100 pair mounting base. The 110RA1-12 is shipped with
preprinted designation strips to simplify circuit identification and installation.
Figure 5-24. Terminating Resistor Block (110RA1-12)
Figure Notes
1. Circuit 1
2. Circuit 12
3. Output Row “A”
4. Output Row “B”
5. Input Row “C”
6. Only First Circuit Shown to All 12 Circuits (2APR)
Per Block
7. 110D-4 Connector Block
8. Printed Circuit Board Mounted on Standard 110A
or 100APR Block
3
8
4
5
1
6
2
7
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