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Installing and Cabling the Cabinets
128 Installation, Upgrades and Additions for Avaya CMC1 Media Gateways
Closet Mounted (110RA1-12)
The 110RA1-12 terminating resistor block consists of twelve 2-pair circuits and provides the 100
Ohm termination used for ISDN-BRI circuits.
Figure 57
shows the wiring of the 110RA1-12. Three rows of 110D-4 connector blocks contain
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.
Figure 57: Terminating Resistor Block (110RA1-12)
Figure 58 shows the wiring connections for the 110RA1-12 terminal block. The TN556D BRI
switch port is terminated to bottom row C.
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
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