User's Manual

Advanced Configuration Features
55
Horizon Compact Release 1.01.01 Wireless Ethernet Product User Manual – Volume 1
11.13.3 Single Wire Option with the PSRM
The “single wire” option is so named because only one data feed is required to be connected to the two
interconnected Horizon systems mounted on the PSRM.
The PSRM supports system redundancy by connecting two Horizon units to a single antenna. Only one of
the radios of the mounted systems may operate at any one time. Both systems have the identical polarity,
either both vertically or both horizontally polarized. One system is configured as the Primary and the other
as the Secondary. Note that the terms “primary” and “secondary” relate solely to the internal functions of
the units and has no relationship to which radio is in stand-by or which is carrying traffic.
Port 1 of the primary unit carries the data feed, with Port 2 of both units interconnected. Port 1 of the
secondary unit handles management traffic. The secondary unit has to be configured for in-band
management and the primary unit configured for out-of-band management.
Switching from the active unit to the stand-by unit is determined by the configuration of the Horizon
Compact units and does not depend on connected Ethernet switches.
After a redundancy switch, once the first unit is able to return to carrying traffic, a manual switch is
required, via a CLI command, to return traffic to the first unit .
Figure 11-4 Redundancy Connections – Single wire option – copper interface
NOTE: For clarity, the PonE power adapter and surge arrestor have been omitted from the
diagrams. Both Port 1 Ethernet connections and the power feed via Port 1 must be protected from
transients.