Unison Component Installation Procedures
7-20
InterReach Unison Installation, Operation, and Reference Manual
CONFIDENTIAL
D-620003-0-20 Rev J
• The
E-HUB STATUS
and
DL STATUS
LEDs should be red.
• All port LEDs should be off because no RAUs are connected yet.
Connecting the Fiber Cables to the Expansion Hub
Considerations:
• Before connecting the fiber cables, confirm that their optical loss does not exceed
3 dB optical budget. RL is less than -60dB.
• If fiber distribution panels are used, confirm that the total optical loss of fiber
cable, from the Main Hub through distribution panels and patch cords to the
Expansion Hub, does not exceed the optical budget.
• Make sure the fiber cable’s connectors are SC/APC (angle-polished).Using any
other connector type will result in degraded system performance and may damage
the equipment. (You can use an SC/APC pigtail if the fiber cable’s connectors are
not SC/APC, refer to “Fusion Splicing of Fiber and Pigtail” on page 7-33, or
replace the connectors.)
NOTE:
Observe all Fiber Port Safety Precautions listed in Section 7.2.3 on page 7-5.
To connect the fiber cables:
The fiber cable is labeled with either
1
or
2
, or is color-coded. For proper connection
between the Main Hub ports and the Expansion Hub ports, refer to the numbering or
color-coded connections you recorded when installing the Expansion Hub(s).
If the fiber jumper is labeled with
1
or
2
:
1.
Connect
1
to
DOWNLINK
on Expansion Hub.
The
DL STATUS
LED should turn green as soon as you connect the fiber. If it does
not, there is a downlink problem. Make sure you are connecting the correct cable
to the port.
2.
Connect
2
to
UPLINK
on Expansion Hub.
The
UL STATUS
LED turns green on the first Main Hub communication. It may
take up to 20 seconds to establish communication.
The Expansion Hub’s
E-HUB STATUS
LED turns green when the Main Hub sends
it the frequency band command.
If the
UL STATUS
and
E-HUB STATUS
LEDs do not turn green/green, check the
Main Hub LEDs. Refer to page 7-16, item 2 in Table 7-5.
If the fiber jumper is color-coded (for example, “blue” or “red”):
1.
Connect “blue” to
DOWNLINK
on Expansion Hub.
The
DL STATUS
LED should turn green as soon as you connect the fiber. If it does
not, there is a downlink problem. Make sure you are connecting the correct cable
to the port.
