User's Manual

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D-620003-0-20 Rev K CONFIDENTIAL
Main Hub Front Panel
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 Hubs 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 when using either single-mode
or multi-mode fiber. Additionally, it is critical to system performance
that only SC/APC fiber connectors are used throughout the fiber network, includ-
ing fiber distribution panels.
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. Refer to Appendix A.4 on page A-3 for the cable
pinout.
Local Monitoring
Use a null modem cable to connect a laptop or PC to the 9-pin D-sub male serial con-
nector for local monitoring or configuring. The cable typically has a DB-9 female
connector on both ends. Refer to Appendix A.5 on page A-4 for the cable pinout.