4RF Aprisa SR+ User Manual - page 327
Product Options | 325
Aprisa SR+ User Manual 1.5.3
Protected Station
The Aprisa SR+ Protected Station is fully monitored hot-standby and fully hot-swappable product providing
radio and user interface protection for Aprisa SR+ radios. The RF ports and interface ports from the active
radio are switched to the standby radio if there is a failure in the active radio.
Option Example
Part Number
Part Description
APSQ-R400-SSC-HD-22-ENAA
4RF SR+, PS, 400-470 MHz, SSC, Half Duplex, 2E2S, EN, STD
The Aprisa SR+ Protected Station is comprised of an Aprisa SR+ Protection Switch and two standard Aprisa
SR+ radios mounted in a 2U rack mounting chassis.
All interfaces (RF, data, etc.) are continually monitored on both the active and standby radio to ensure
correct operation. The standby radio can be replaced without impacting traffic flow on the active radio.
The Aprisa SR+ radios can be any of the currently available Aprisa SR+ radio frequency bands, channel
sizes or interface port options.
The Aprisa SR+ Protected Station can operate as a base station, repeater station or remote station. The
protection behaviour and switching criteria between the active and standby radios is identical for the
three configurations.
By default, the Aprisa SR+ Protected Station is configured with the left hand radio (A) designated as the
primary radio and the right hand radio (B) designated as the secondary radio.
Each radio is configured with its own unique IP and MAC address and the address of the partner radio.
On power-up, the primary radio will assume the active role and the secondary radio will assume the
standby role. If, for some reason, only one radio is powered on it will automatically assume the active
role.