2
No.
Name
Description
the messages.
Subtraction
Sign
In call status, press this key to reduce talk volume.
In standby status, press this key to reduce ring volume.
In standby status, press this key to reduce main VTH volume
to 0, and the device enters DND status.
Unlock
Press this key during talk, and the corresponding VTO unlocks.
+
Plus Sign+
Call Key
In standby status, press
“Plus Sign+ Call Key” to arm and
disarm.
In disarmed status, press this combination key to arm.
Indicator light flashes and the device beeps continuously.
In armed status, press this combination key to disarm.
Indicator light turns off and the device beeps twice.
+
Subtraction
Sign+
Call
Key
In standby status, press
“Subtraction Sign+ Call Key” to
switch rings.
Table 1-1
1.2
Rear Panel Interface
Figure 1-2
Reset Key
Summary of Contents for VTH2201DW
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