How Do I Choose the Best Emergency Pagers?

Emergency Call (Emergency Call), the so-called emergency call refers to the use of a mobile phone to dial 112, 110, 119, 120 and other alarm or help numbers. The urgency of these numbers has made it mandatory for countries to use any network available at the time.

Other methods for emergency calls

You can call for help when the call doesn't work:

1. A temporary beacon. Lit three fires in succession, preferably at the same distance in the middle, which can burn smoke during the day, and put some grass and other items on the fire that produce dense smoke. Fires can burn at night.

2. Noise for help. Send a distress signal within a short distance, you can shout loudly, or you can use other items to make sounds, such as hitting trees with an axe or a wooden stick.

3. Use a reflector. It is a very effective method to use the reflected light to reflect the signal. Available reflective items are metal signal mirrors, canned skins, glass sheets, glasses, etc.

Hospital emergency call system

1. The system consists of call signal latch, priority coding, decimal decoding, display and logic control clearing.

2. The core part of the circuit is the priority encoder. When a signal is input, the corresponding key signal is latched with a trigger, the priority of the signal is determined by the priority encoder, and the relevant display output code is provided.

3. The binary decoding circuit decodes the current highest level call. After the medical staff has finished processing it, the trigger signal of the call is cleared, and other call inputs are discriminated.

4. The latching and clearing of signals can be implemented using the following D flip-flops. 8-channel priority encoder model is 74148, 3/8 binary decoder can be selected as 74138, D flip-flop can be selected as 7474. ^[2]

Emergency call system diagram