Alcatel-Lucent 7330 Product Information Manual page 96

3 — ONT and MDU general and interface technical specifications
Note
(1) The transmit output power values shown apply to MoCA ONTs (as measured from the F-connector
output using a power meter).
3.10 RSSI specifications
Received signal strength indication (RSSI) is a measurement of radio signal strength
at the receiver. Use of the RSSI metric is governed by the IEEE 802.11 standard,
which does not define any relationship between RSSI value and power level in mW
or dBm. RSSI measurements are specified without units and range in value from 0
to 255 with the highest value being referred to as RSSI Max. Defining RSSI values
or power levels is the responsibility of the vendor.
According to the Alcatel-Lucent implementation of RSSI for ONTs, the RSSI value
is expressed in power levels of dBm and is the measurement of the received optical
signal level at 1490 nm in dBM. The RSSI range is -65.536 to +65.534. The absolute
accuracy of the optical signal reading is +/-3.0 dB. Take this possible variation in
measured signals into account when reading the metric values.
A RSSI value of zero occurs when the ONT is not connected to the PON or there is
a loss of connectivity with the PON. In the latter case, the problem may be either with
the ONT or PON.
Table
Standard
IEEE 802.11
3-20
Table 3-11 MoCA ONT nominal transmit output power
TL1 value (dBm)
-26 and lower
-23, -24, -25
-20, -21, -22
-17, -18, -19
-14, -15, -16
-11, -12, -13
-8, -9, -10
-5, -6, -7
-2, -3, -4
0, -1
3-12 describes the supported RSSI specifications.
Table 3-12 RSSI specifications
December 2010
ONT Product Information Guide Edition 01
Nominal transmit output power
(dBm) (1)
-26
-23
-20
-17
-14
-11
-8
-5
-2
0
Description
A set of standards carrying out wireless local area network
(WLAN) computer communication in the 2.4, 3.6, and 5 GHz
frequency bands
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