4.3
Protection configuration
This section describes 1+1 protection implementation for PhoeniX IDU. The possible 1+1
configuration modes are Frequency diversity (FD), Hot Standby (HSB) and Space diversity (SD).
Figure 4.9
1+1 interconnection of two
CFIP PhoeniX IDUs (with power protection ports – P/N
S0GIPT11)
For 1+1 operation two CFIP PhoeniX IDUs (“working” and “protection”)
before power is supplied
should be interconnected as shown in
Figure 4.9
- via one of the 1000Base-T user data and
management Ethernet switch ports with Ethernet cable (I0ACPP02); modems should be
interconnected via special extension port for 1+1 protection with protection cable CAT6 (P/N
S0ACPP1); grounding screws should be interconnected with grounding cable and connected to
ground circuit; power protection ports (if available) should be interconnected with power protection
cable (P/N S0ACPR11).
4.3.1
Frequency Diversity (FD) protection mode
For FD mode performance two links differentiated by frequencies are working in parallel.
Each link uses different frequency pair. One of the links is marked as ‘working’ and the other one as
‘protection’ link. At transmitter side the data is duplicated and transmitted in both links. At receiver
side data is received from both transmitters. The decoder of working link then selects the preferred
received data.
Setup for 1+1 Frequency Diversity (FD) mode
(!)
Power protection connector for power redundancy is optional and is available only
for CFIP PhoeniX IDU P/N S0GIP*11.
(!)
For proper 1+1 operation 2 IDU’s are required on each side of the link.
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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