Signal strength indicators
Digi TransPort User Guide 79
Signal strength indicators
On routers equipped with W-WAN modules, there are three LEDs on the front panel that will
indicate the strength of the signal, as shown in the table below.
X.21 (RS-422)
1 With respect to Digi routers
2 Direction depends on whether the Digi router is clock sink or clock source.
LEDs lit Signal strength
None Under -113 dBm (effectively no signal)
1 -112 dBm to -87 dBm (weak signal)
2
-86 dBm to -71 dBm (medium strength signal)
3 -70 dBm to -51 dBm (strong signal)
Description RS232 signal Direction
1
DB 25 Pin# DB 9 Pin#
Transmit Data (A) TxDA in 2 1
Receive Data (A) RxDA out 3 2
Control (A) CTLA in 4 3
Indication (B) INDA out 5 4
Ground GND n/a 7 5
Clock (B) CLKB
in or out
2
9n/a
Indication (B) INDB out 13 9
Transmit Data (B) TxDB in 14 6
Receive Data (B) RxDB out 16 7
Clock (A) CLKA
in or out
2
17 n/a
Control (B) CTLB in 19 8
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