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2.4 Information about the Trunk Cards
88 Installation Manual
Switch Settings
Pin Assignments
RJ45 Connector for Trunk Use
RJ45 Connector for Extension use
BNC (coaxial) Connector (TX)
Switch Type Usage and Status Definition
Termination Slide Select 120 Ω (default) or 75 Ω to match the connector type to be
used.
A/B Slide When using an RJ45 connector, select A (default) for trunk or B for
extension use.
When using BNC connectors, make sure that A is selected.
Frame Ground
Short
Short pin J308 is for BNC (TX) outer conductor, and J309 is for BNC (RX)
outer conductor.
Connection of 1 and 2: Open (default)
Connection of 2 and 3: Short
No. Signal Name Level [V] Function
1 RX+ (+) Receive data (+)
2 RX- (-) Receive data (-)
3 Reserved – –
4 TX- (-) Transmit data (-)
5 TX+ (+) Transmit data (+)
6-8 Reserved – –
No. Signal Name Level [V] Function
1 TX- (-) Transmit data (-)
2 TX+ (+) Transmit data (+)
3 Reserved – –
4 RX+ (+) Receive data (+)
5 RX- (-) Receive data (-)
6-8 Reserved – –
No. Signal Name Level [V] Function
1 TX+ (+) Transmit data (+)
2 TX- (-) Transmit data (-)
8
1
8
1
1
2