Specifications
Registering individual portables / 
85
P0992639 01 Modular ICS Companion Installer Guide
Measuring directed RSSI
You may want to measure the RSSI between a portable and a 
specific base station radio. For example, you may suspect that 
one of the two radios in a base station is not working properly. 
You can also use directed RSSI to prevent hand-off while you 
find a cell edge. To measure the RSSI of a specific radio, you 
must be in range of two base stations—the one you want to 
measure and another base station.
You cannot measure the directed RSSI of both radios in the 
base station at the same time.
Before you begin to measure directed RSSI
Use the Companion Provisioning Record to find the 
following:
• the five-digit ID of the base station radio you want to 
measure, by mapping the base station location to the time 
compression multiplex (TCM) port. The first four digits 
indicate the TCM port to which the base station is 
connected. The last digit indicates the number of the radio 
on the base station. For example, the number 03142 on the 
base station is connected to TCM port 0314, and 2 is the 
radio number. The number may be printed on a label 
affixed to the lower right corner of the base station 
mounting bracket.
• the radio IDs of all other base stations in the same location.
To measure directed RSSI using your portable
1. Repeat steps 1 to 3 of To measure undirected RSSI on page 
84.
2. When the portable displays the base station ID you want to 
measure, move out of the cell boundary range so that hand-
off occurs, and press ´ or e.










