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B-4
Cabling Specifications
The OM 1000 can either source or sync the transmit clock; this is determined by a configuration
selection. Syncing the clock is needed when sending data through a modem through a network
T1 line. In this case, the modem sources a clock that is locked to the network. The OM 1000
syncs the clock and sources data to the modem to be sent to the network.
Ethernet 10Base-T Interface Cabling
Refer to Amp drawing number C-557827 for cable details.
Connector type
Cable type
Maximum cable length
Table B-4
Ethernet 10Base-T interface connector pinout
P i n N u m b e r
S i g n a l
1
TX+
2
TX−
3
RX+
4 and 5
n/c
6
RX−
7 and 8
N/c
OM 1000 Installation and Operation Manual
RJ-45 connector
STP-5 (category 5 shielded twisted pair)
150 feet
D i r e c t i o n
D e s c r i p t i o n
Transmit data +
Out
Transmit data −
Out
Receive data +
In
No connect
Receive data −
In
In
Data set ready
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