User's Manual

Unison Main Hub PRELIMINARY

3-4 InterReach Unison User Guide and Reference Manual

PN 8700-10

620003-0 Rev. A

3.1.1 Optical Fiber Uplink/Downlink Ports

The optical fiber uplink/downlink ports transmit and receive optical signals between

the Main Hub and up to four Expansion Hub(s) using industry-standard SMF or

MMF cable. There are four fiber ports on the front panel of the Main Hub; one port

per Expansion Hub. Each fiber port has two female SC/APC connectors:

• Optical Fiber Uplink Connector

This connector (labeled

UPLINK) is used to receive the uplink optical signals from

an Expansion Hub.

• Optical Fiber Downlink Connector

This connector (labeled

DOWNLINK) is used to transmit the downlink optical sig-

nals to an Expansion Hub.

CAUTION: To avoid damaging the Main Hub’s fiber connector

ports, use only SC/APC fiber cable connectors.

3.1.2 Communications RS-232 Serial Connector

Remote Monitoring

Use a standard serial cable to connect a modem to the 9-pin D-sub male serial con-

nector for remote monitoring or configuring. The cable typically has a DB-9 female

and a DB-25 male connector. The following figure shows the cable pinout.

Figure 3-4 Standard Serial Cable Pinout

DB-9

Connector

DB-25

Connector