16
MX250 Hardware Manual
3.4.3.2
PCM RJ45 Pin Assignments
Each circuit on the PCM card terminates on an RJ45 connector. Figure 3-8 shows the pin
placement of each pin of the PCM. Both circuits have the same pin assignment. Figure 3-9 shows
the function assignment of each pin.
Figure 3-10 displays the connection of PCM circuits to the network or other equipment. Use a
straight cable to connect the MX250 to the network jack. Use a crossover cable to connect the
MX250 to an existing terminal system (such as an existing PBX). Figure 3-10 also displays MX250
pinouts and pinouts typically used for terminal and network equipment. Consult the
documentation for specific devices to confirm the pin assignment.
Figure 3-8
Pin Assignment of PCM Circuits on PCM Card
Pin
Signal Name
Circuit
Source
3
NC
AA
common
6
NC
AA
common
7
NC
AA
common
8
NC
AA
common
1
Received Data, ring
BAa
Facility
2
Received Data, tip
BAb
Facility
4
Transmitted Data, ring
BBa
MX250
5
Transmitted Data, tip
BBb
MX250
Figure 3-9
Pin Description of a PCM Circuit
Figure 3-10
Wiring the PCM Circuits to the Network or Other Equipment
Содержание MX250
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Страница 62: ...58 MX250 Hardware Manual Index U UPS 23 V ventilation 22 W WAN connection 34 warning definition in manual 4 ...