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
9
n/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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