•
The outgoing (Tx) traffic at each site is passed to both ODUs, and both are always transmitting;
•
The incoming (Rx) traffic is picked from one of the ODUs;
•
1+1 configuration provides hardware redundancy and mitigates multipath fading;
•
Both Tx and Rx switching is hitless.
1.4.3
CFIP PhoeniX 1+1 Hot Stand-by (HSB)
•
HSB protected (1+1) configuration is used with single antenna and a coupler at each side of the
link;
•
Both the incoming (Rx) and outgoing (Tx) traffic is switched to either one link or other, only
single ODU at each side is transmitting;
•
Protects modem and radio from failure;
•
Rx switching is hitless, Tx switching <50ms.
Figure 1.6
CFIP Phoenix FD and HSB 1+1 configuration
1.4.4
CFIP PhoeniX 1+1 Space Diversity (SD)
•
SD protected (1+1) configuration is used with two antennas at each side of the link;
•
Both the incoming (Rx) and outgoing (Tx) traffic is switched to either one link or other,
only single ODU at each side is transmitting;
•
In Space Diversity mode antennas are located 10-12 meters apart hence allows
avoiding frequency selective fading - multipath (e.g. reflection over water, air
refraction, etc.);
•
Rx switching is hitless , Tx switching <50ms.
CFIP PhoeniX Series TDM/IP Split Mount System Technical Description and Configuration Guide
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Rev. 1.13
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© SAF Tehnika JSC 2015
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