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6. TECHNICAL PRECAUTIONS
RESET switch
Do not use RESET switch except for initializing or
testing the NHX-80X. If RESET is pressed while a call
is being placed or a Bathroom call or Cord-out trouble
call has been placed, it will suspend the call.
* Do not press RESET switch except when installing,
changing subs, or when system malfunctions.
Adjusting Preset Volumes
On the bottom of the NHX-50M, adjust volume controls
to desired level.
* TRANSMIT: Adjusts the NHX-50M’s voice heard at
bedside sub.
* RECEIVE: Adjusts the speaker volume on NHX-50M.
Adjustable 3-position control on the left panel.
• PRE-TONE: Adjusts pre-tone to the desired level
heard at bedside sub.
• TONE: Adjusts initial call tone level. 3-position switch
varies volume from preset level (user-adjustable).
• DUTY STATION: Adjusts call tone level heard at Duty
Station
When System Malfunctions;
Call tone sounds on the NHX-50M without being called.
Call-in LED is lit, but no call tone.
In such occasions, check the status of system, and turn
power switch off and on again at the NHX-80X. If the
system does not return to normal operation, turn OFF
power switch and contact your installing dealer or
Aiphone.
Call priority:
1. Cord-out trouble call
2. Bathroom call, or NHR-3TS common area
bathroom call or staff call (urgent call),
3. Routine call
In Standby mode;
Priority is put in the order of Cord-out trouble call,
Bathroom call and Routine call.
Cord-out trouble call is put in first priority, and overrides
any other calls on the system.
During communication;
The NHX-50M master station sounds an incoming call
tone while talking to another station, the same as in
standby mode. A new call doesn’t override an existing
conversation. Reply after concluding current call.
Up to 5 sub call-ins can be displayed on the selector
switch bank. All the calls placed are held in a queue,
and will resume light and tone at NHX-50M after each
previous call is concluded.
Momentarily hang up handset, and the next call tone is
audible. The sixth call will not illuminate on
NHX-50M nor on Corridor lamp (Only zone light will be
lit).
The NHX-50M is capable of having as many calls held
as there are sub stations. To reply to next call, hang up
and lift handset or press TALK button to establish
channel.
• If calls are of the same level; in the order of time of
call,
• If calls are of different levels; in the order of urgency.
Operational Modes in Multi-Station Patient Room
application
When single or multiple calls have been placed from the
same patient room, corridor lamp will be activated as
follows;
Warning tone
(1) If a call has been left unanswered for 90 seconds,
the call tone volume will go up to HIGH level
regardless of the set position.
(2) If handset is left off the hook at NHX-50M for 90
seconds during communication, a warning
tone(steady) will be heard. Replace handset, and
the tone will stop.
Line-off Trouble: Connector unplugged status on
Bedside or Bathroom call sub stations & Duty station
When a buzzer warning tone (*) has been activated at
the NHX-50M, the wire connector is disconnected from
the back of the Sub station or Duty Station. The warning
tone cannot be silenced by TONE-OFF button. To mute
the slow buzzer (with a blinking call-in LED on the
corresponding Sub), either lift handset or press TALK
button. To mute faster buzzer with no LED lit, remount
the shorting connector (**) on CN104 at the NHX-80X.
The Duty Station will no longer be acknowledged. To
restore, call the installing dealer or Aiphone.
(*) Line-off Trouble detects disconnected status of 3, 4,
5 & 6 wires only on sub station.
(**) Shorting connector is attached to the internal wires
inside the NHX-80X.
Type of calls placed Corridor lamp
Sub1 Sub2 Sub3 Red White
Routine – – – Steady
– Bathroom – Blinking –
– – Cord-out – Blinking
Routine Bathroom – Blinking Steady
Routine – Cord-out – Blinking
– Bathroom Cord-out Blinking Blinking
Routine Bathroom Cord-out Blinking Blinking
Sub2
–
Bathroom
–
Bathroom
–
Bathroom
Bathroom