Radwin 5000 HPMP User Manual page 293

RADWIN HSS
• HSS Client‐Continue Transmission (HSC‐CT): If the unit loses synchronization with the
HSS Master, the link remains active. However, without synchronization pulses, it is pos‐
sible that this unit will cause interference.
• HSS Client‐Disable Transmission (HSC‐DT): If the unit loses synchronization with the
HSS Master, the link is dropped until the synchronization pulses resume. This setting
prevents the unit from causing interference.
The remote ODUs that are not located at the hub site, are called Independent Units (INU).
RADWIN offers two types of HSS:
» Serial HSS
The RADWIN Serial Hub Site Synchronization (SHSS) method uses a cable connected
from the master ODU to all collocated ODUs; this cable carries pulses sent to each
ODU, which synchronize their transmission with each other. SHSS is covered in Chap‐
ter 14.
» Ethernet HSS
The Ethernet HSS (HSSoE) method requires Layer 2 Ethernet connectivity between
collocated ODUs. It has two requirements:
• Collocated ODUs providing Ethernet services only, should be connected to an IDU‐H
instead of regular PoE devices. Other simple switches may work with degraded per‐
formance. They are not recommended and problems arising from their use will not
be eligible for any kind of support.
• Collocated ODUs providing E1/T1 services should use an IDU‐C or IDU‐E and then be
connected to an IDU‐H functioning as a switch. One of the LAN ports on the IDU‐C or
IDU‐E is connected to any of the six IDU‐H PoE ports or the two LAN ports. (This is
possible because the IDU‐C or IDU‐E LAN cable only uses four pins for data; the
power pins are not used so there is no risk of damage to them.) In this way, up to
eight such ODUs may be collocated.
You may only use one IDU‐H. That is, they may not be cascaded.
Note
If you are using an IDU‐C0 (GbE) it must be connected to the IDU‐H LAN port
only. Connecting it to the PoE ports will damage the unit and in any event, it
will not work.
Caution
RADWIN 5000 HPMP User Manual Release 3.5.70 13‐3