Radwin 2000+ SERIES, Руководство пользователя

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RADWIN 2000+ Series User Manual Release 4.2.40 11 ‐ 1
Chapter 11: Hub Site
Synchronization over Ethernet
11.1 Scope of this Chapter
This chapter describes Ethernet hub site synchronization (EHSS), and how to implement it.
11.2 RADWIN Ethernet HSS
11.2.1 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/
HP instead of regular PoE devices. Other simple switches may work with degraded
performance. They are not recommended and problems arising from their use will
not be eligible for any kind of support.
• Collocated RADWIN 2000+ Series class ODUs providing E1/T1 services should use an
IDU ‐ C or IDU ‐ E and then be connected to an IDU ‐ H/HP 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/HP 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 dam ‐
age to them.) In this way, up to eight such ODUs may be collocated.
If you are using an IDU ‐ C0 (GbE) it must be connected to the IDU ‐ H/HP
LAN port only. Connecting it to the P0E ports will damage the unit and in
any event, it will not work.