GDC-400H Wireless Handset
User Guide
45
7. Troubleshooting
Problem
Possible Cause
Solution
LCD is blank
No power
Assure batteries are properly installed
and charged. Press and hold the
End/Power button for 1 second.
“NO CHANNEL” displayed
when TALK button pressed
All DECT channels are
in use.
Wait until a channel is available.
Low or high audio volume
Volume needs adjusting
While connected to a call, press Up or
Down arrow on the Navigation button.
Low or high ring volume
Volume needs adjusting
Adjust Ring volume level; refer to Image
and Sounds Section.
“UNREGISTERED” displayed
in the LCD
No active subscription
Subscribe the handset, refer to
Subscribing the GCD-400H to a System.
Low battery icon ( ) is flashing
on LCD with warning tone
Battery level is low
Recharge the battery.
Power-OFF right after power-
ON
Battery level is below
operational state.
Recharge the battery.
Insufficient RF from
base station, no RF-lock
to base station.
Move to obtain higher RSSI; wait for RF-
lock to base station.
Tone is low or high when
pressing a digit
Keypad tones are
disabled or tones
volume needs adjusting.
Use Up and down arrow on Navigation
button to adjust volume. Check Keypad
Tones are enabled/disabled in the User
Menu.
Unexpected call disconnect or
call failure
Poor RF environment.
RF can change over time, move to obtain
higher RSSI.
Battery duration is less than
specified
Batteries failing and/or
poor battery charging
habits
Charge batteries and keep handset in
cradle when not in use; refer to Installing
the Batteries Section.
Subscription fails
Interference from other
DECT system. Too far
from Base station, no
available channel or
wrong Base station
(RFPI) or Auth code
selected.
Turn other DECT systems Off.
Assure handset is in range of base
station.
Assure RFPI and AC are correct.
Wait for an available wireless channel.
When pressing TALK button,
the Phone icon (
) blinks
several times and disappears
Subscription error
Terminate the subscription and re-
subscribe.
When pressing TALK button,
nothing happens
Out-of-range
Assure the handset is locked to a Base
station and RSSI is at least two (2) bars.
Summary of Contents for GDC-400H
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