Help Hot Line (U.S. only): 1-800-530-9960
7-17
D-620003-0-20 Rev J
CONFIDENTIAL
Unison Component Installation Procedures
7.4.1.1
Installing Main Hubs in a Multiple Operator System
Installing Main Hubs in a multiple operator system is the same as described in
Section 7.4.1 on page 7-13.
We recommend mounting all multiple operator system Main Hubs in the same
rack(s), grouped by frequency or wireless carrier. For example, group the Main Hubs
for the 800 MHz cellular bands together, and so on.
Connecting to base stations and repeaters is the same as described in Section 7.6 on
page 7-35
and Section 7.6.1 on page 7-38.
2.
Main Hub
power is
On with
Expansion
Hubs con-
nected and
powered
on.
LINK
Off
• If the port LEDs do not illuminate, check the fiber
uplink for excessive optical loss.
• If Expansion Hub’s
DL STATUS
LED is red:
• Verify that the fiber is connected to the correct
port (that is, uplink/downlink)
• Swap the uplink and downlink cables.
• Connect the fiber pair to another port. If the sec-
ond port’s LEDs do not illuminate Green/Red,
replace the Main Hub.
• If the second port works, flag the first port as
unusable; replace the Main Hub when possible.
No uplink optical
power, the Expansion
Hub is not recognized
as being present.
No communication
with the Expansion
Hub.
E-HUB/RAU
Off
LINK
Red
• If the Expansion Hub
DL STATUS
LED is red,
check the downlink fiber cable for excessive opti-
cal loss.
• Connect the fiber pair to another port. If the sec-
ond port’s LEDs do not illuminate Green/Red,
replace the Main Hub.
• If the second port works, flag the first port as
unusable; replace the Main Hub when possible.
No communication
with the Expansion
Hub.
E-HUB/RAU
Off
LINK
Green
The Expansion Hub or connected RAU reports a fault
Use AdminManager to determine the problem.
The Expansion Hub or
one or more RAUs are
off-line.
E-HUB/RAU
Red
Table 7-5
Troubleshooting Main Hub LEDs During Installation (continued)
During
Installation
Power On
LED
State
Action
Impact
