System Description

TD 93025US
9 May 2019 / Ver. I 67
System Description
teleCARE IP
A normal call is activated by a short press on the button, an assistance call is activated by
pressing the button for longer than 3 seconds. When a call has been made, a delay of one
minute will prohibit the NITX from sending updates (of the same call type) to prevent
draining the internal buffer capacitor too fast, this will prevent triggering false battery low
alarms.
A call can be cancelled locally by 1 long press followed by 3 short presses within 3 seconds.
Remote cancelling can be done by a 3 button doorside module or a portable messaging
device, such as an Ascom handset.
The mobile transceiver sends a “Heartbeat” signal at regular intervals (default 4 minutes). If
the system fails to receive the heartbeat signal within a predetermined period then it is
assumed that the transceiver has failed or is missing and an alarm will automatically be
generated.
An infrared proximity detector which monitors the correct attachment of the mobile
transceiver on the wrist is located at the back of the mobile transceiver.
If the mobile transceiver is removed from the wrist the infrared proximity detector will
detect and automatically activate a “mobile transceiver detached” alarm.
A motion detector detects when the mobile transceiver is in motion. If a mobile transceiver
stays motionless for more than two hours it will automatically activate a no-motion alarm.
9.6.7 NITX Staff Transceiver
The NITX-BBB staff transceiver is for staff members. It is robust and water resistant (IP 67).
Figure 62. teleCARE IP staff transceiver (wrist and pendant)
The NITX-BBB staff transceiver contains an 916-921 MHZ RF transceiver, a call button and a
reassurance LED. It also contains a125 kHz LF transceiver used for cancelling calls from
other NITX (BAB) and NIFX (1AB and 1BB) transceivers and for location determination using
LF beacons.
The NITX-BBB staff transceiver cancels calls initiated from other NITX (BAB) and NIFX (1AB
and 1BB) transceivers through an LF transmission and provides the identification of the staff
member cancelling the call. A staff member can also initiate an assistance call from the
staff transceiver when in need of assistance. It is used in the teleCARE IP system.
A call cancellation (LF transmission) is activated by a short press on the green button when
in close proximity (up to 30cm) of a wireless call device that includes an LF receiver. An
assistance call (RF transmission) is activated by a long press (more than 3 seconds) on the
green button.