Specifications

Installation and Operation Manual Appendix F Hub Site Synchronization
Airmux-200 Ver. 1.750 Architecture F-3
SYNC 1 SYNC 2 SYNC 3 SYNC 4 SYNC 5
SYNC 10 SYNC 9 SYNC 8 SYNC 7 SYNC 6
HSS Unit connector instructions:
Ports must be connected continuously
When disconnecting a radio unit shift
used ports to maintain continuous connectivity
Figure F-3. HSS Interconnection Unit
Ensure that the collocated units are connected in sequence from SYNC 1. If an
ODU is removed form the hub site, then all remaining ODUs must be reconnected
to maintain the connectivity.
 To connect an ODU to the HSS
1. Unscrew the protective cover from the port marked SYNC 1.
2. Connect the RJ-45 connector from one end of the prepared CAT 5e cable to
SYNC 1.
3. Connect the other end of the CAT 5e cable to the ODU connector labeled
SYNC.
4. Tighten the protective seal that is on the prepared cable over the RJ-45
connector.
5. Repeat for all ODUs that are to be collocated at the hub site. The next ODU
to be connected is inserted to SYNC 2, followed by SYNC 3 and so on.
F.3 Architecture
One of the collocated ODUs at the hub site acts as the Hub Sync Master (HSM);
all the other collocated units are Hub Sync Clients. The Hub Sync Master
generates the pulses that synchronize the timing of the Hub Sync Clients.
A Hub Sync Client can be configured to be two different types:
Hub Sync Client–Continue Transmission (HSC-CT): In the event that the unit loses
synchronization with the Hub Sync Master, the link remains active. However,
without synchronization pulses, it is possible that this unit will cause
interference.
Hub Sync Client–Disable Transmission (HSC-DT): In the event that the unit loses
synchronization with the Hub Sync Master, the link is dropped until the
synchronization pulses resume. This setting prevents the unit from causing
interference.
Note