Radwin RADWIN 2000 D+, User Manual

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RADWIN 2000 D+ User Manual Release 3.6.00 11 ‐ 1
Chapter 11: Hub Site Synchronization
over Ethernet
11.1 RADWIN Ethernet HSS
11.1.1 Ethernet HSS Requirements
The RADWIN Ethernet Hub Site Synchronization (HSSoE) method provides intra ‐ site
synchronization without the need for external cables or an HSS unit. Sync signals are
exchanged between collocated radios over the regular Ethernet connection.
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 RADWIN 2000 class 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.
Note
You may only use one IDU ‐ H. That is, they may not be cascaded.
Caution
If you are using an IDU ‐ C0 (GbE) it must be connected to the IDU ‐ H LAN port
only. Connecting it to the P0E ports will damage the unit and in any event, it
will not work.