Deployment
To take measurements, you can use a registered FON-D71-H handset to measure the signal strength of the current
position of a base station through the Metering Mode.
To enable Metering Mode:
1.
Configure a FON-D72-M, FON-D72-B and a FON-D71-H with FortiVoice.
2.
On the FON-D71-H idle screen dial *1234203#, which will allow configuration of the measurement setting.
3.
On the FON-D71-H press the
OK
button.
4.
Go to
Settings > Telephony > Metering Mode
.
5.
Change Status to Enabled.
6.
Select the RSSI unit to display (dBm is default)
7.
Select the measurement interval. This has a value of 5 to 15 (0.8 second to 2 .4 seconds). The recommended value
is 6.
8.
Press the
Save
softkey.
9.
Press the off-hook button to return to the idle screen and display the measurements.
10.
Repeat steps 1 to 9 with a second FON-D71-H to check voice quality between two handsets while also taking
measurements. The idle screen will display the following:
RSSI
: Received Signal Strength Indication. The recommended value is -27 to -85 dBm. For guaranteed call quality and
interference-free handover, a reading of -80 dBm. To guarantee synchronization between base stations, a reading of
-85 dBm is needed.
Fr. quality
: Frame quality. Percentage of packages received without error. Recommended value is 100%
Base Station
: The RPN (Radio Fixed Part Number), identifying the base station that the handset is connected to.
Frequency
: Carrier frequency of the signal received. Value range: 0 to 30.
Slot pair
: Time slot for the reception channel on which the measurement was performed.
Measurement procedure
After the handsets have registered and Metering Mode is enabled, measurements can now be taken. It is
recommended to keep a measurement log for reference:
1.
Temporarily affix the measuring base station in the planned position where it will be installed.
2.
Establish a call between the two measuring handsets, observing the signal, until the RSSI reaches -80 dBm. Make
note of this within your reference log.
FortiFone FON-D72 User Guide
18
Fortinet Technologies Inc.
