Table of Contents
Advertisement
Applicant: Matsushita Electric Works, Ltd.
2. Operation
In unit operation, there are the following three independent modes;
- Power down mode
- Emergency call mode
- Self test mode
Emergency call
The following describes each mode;
2.1. Power Down Mode
In this mode, all the circuits in the phone are being off to save battery. And this is also the mode where VMS
(Emergency Call) button or TEST button are waiting for being pushed.
Since large-capacity Primary Lithium Ion Batteries are incorporated, as to battery life, even if monthly test by using
TEST button (Please refer to the TEST Mode mentioned below) is made, it is sufficiently possible to make Emergency
Calls five years later without replacing batteries.
2.2. Emergency Call Mode
2.2.1. Initiating a Call
The unit does not have a conventional cellular keypad Rather, it has a large "Emergency call button" design in
order to simplify its use. When the phone is in Power down mode, holding VMS button for 1 second will initiate an
emergency calling process.
2.2.2. Establishing Position
The unit incorporates a built-in Global Positioning System (GPS) receiver. The GPS receiver is used to establish
the position of the user (in latitude and longitude format).
After obtained the location, the unit will place a call to the Emergency Response Center (ERC) utilizing a
pre-programmed, stored area code, NNX, and number via the local cellular telephone company.
When the phone initiates an Emergency call, the DISPATCH LED will be flashing the call in progress and till
Help-Enroute established.
automatically try the other system (A or B).
Once an emergency call is established to the Emergency Response Center (ERC) and the users identification
(ESN, MIN) has been sent (utilizing DTMF tones as the encoding/signaling medium) to the ERC (utilizing DTMF
tones as the encoding/signaling medium) enabling the ERC personnel to determine the users identity. The location
information is then sent to the ERC and then dispatch appropriate response teams. At no time will the GPS receiver
and the AMPS transmitter operate simultaneously.
Emergency Portable Cellular Telephone
Power down
If the call cannot be completed via the preferred system (A or B) the unit will
ECG2111
- 4 -
Transmitter Type: HHV20021106
Self test
Advertisement
Table of Contents
