User's Manual

12 Pelco Manual C1941M (7/98)
3.2.3.1 DB-9 Connector Pin-outs
The DB-9 connector is reserved for factory use only.
Figure 7. RJ-45 Pin-outs
3.2.3.2 RJ-45 Connector
The RJ-45 connector pin-outs are illustrated in Figure 7.
Because both RJ-45 connectors have the same wiring pin-outs, they require the
same “flipped” cable. In other words, the IN connector requires a “flipped” cable for
connecting the first unit to the CC1, and the OUT connector requires a “flipped” for
cascading other units. A “flipped” cable is as follows: Pin 1 of the cable at one end
becomes pin 8 at the other end. Refer to Figure 8.
Note that the active pin-outs are associated with the outer four pins; namely, 1, 2, 7
and 8. All accessories on the System 9760™ require the “flipped” cable to be used
to attach peripheral equipment. This presently pertains to the KBD, MXB, CXT,
ALM, MDA, CDU-T and now the VCRC unit.
TO INTERFACE THE VCRC UNIT TO ANY SERCOM PORT ON
THE REAR OF THE CM9760-CC1
OR BETWEEN ONE VCRC UNIT AND ANOTHER,
FOLLOW THE DIAGRAM BELOW:
Figure 8. RJ-45 Connector Pin-out Geometry