Joiwo's history in the field of public telephones

Joiwo's history in the field of public telephones

Public telephones can be seen everywhere in life, such as suburbs, highways, subways, campuses, etc. They are widely used in various fields. In the 1970s and 1980s, when cell phones were not widely available, people used pay phones. The primary means of communication and communication. 

Telephone communication is a communication technology that uses "electricity" as the medium to transmit language through the mutual conversion of sound energy and electrical energy. To communicate between two users, the simplest form is to connect two phones with a pair of lines.

1. When the speaker picks up the phone and speaks into the microphone, the vibration of the vocal cords excites the air to vibrate, forming sound waves.

2. Sound waves act on the microphone to generate current, which is called voice current.

3. The voice current is transmitted along the line to the receiver of the other party's phone.

4. The role of the receiver is just the opposite of that of the microphone - it converts the current into sound waves, which are transmitted through the air to the ear. In this way, the simplest calling process is completed.

Joiwo Explosion-proof Technology Co., Ltd. has more than 17 years of history in public telephones. Joiwo has many years of research and successfully developed a series of high-quality telephones. They are reasonably priced, simple to operate, and can adapt to many different systems. The phone has an advantage in price. For example, JWAT205 andJWAT203 are Joiwo’s popular public telephones. As a company that has been developing for many years, our after-sales service is also very perfect.

We manufacture most of the parts by ourselves(handset,keypad,hanger etc).We have all kinds of machines doing moulding,injection,die casting,hardware machining.Our telephones are widely used in oil exploitation,chemical industry,prison,tunnel etc.As a reliable supplier , we can provide you with high-quality products and good after-sales service.

Ningbo Joiwo Explosionproof Science & Technology Co., LTD         

Add: No. 695, Yangming West Road, Yangming Street, Yuyao City, Zhejiang Province，China 315400

Tel: +86-574-58223625 / Cell: +8613858299692

Email: sales02@joiwo.com