The telephone can be integrated with a programmable exchange and coupler to form an independent communication system.

2. Directly connects to the telecommunications network.

3. After forming the communication system, each telephone is an independent workstation, and a failure in one does not affect the entire system's operation.

4. After the call system is assembled, the product features automatic gain, ensuring voice volume remains consistent regardless of distance or the number of telephones.

5. The internal circuit of the telephone uses a DSPG digital chip, offering advantages such as accurate dialing, clear conversation, and stable performance.

6. Carbon steel surface electrostatic spraying, with high mechanical strength and strong impact resistance.

7. Call number display feature.

8. Features an incoming call and connection indicator light.

Suitable for environments in subway systems, pipeline tunnels, road tunnels, highways, power plants, gas stations, ports, steel mills, etc., with specific requirements for moisture resistance, fireproofing, noise reduction, dustproofing, and frostproofing.

Usage Instructions:

1. Caller picks up, presses button, dials recipient's phone number → recipient's phone rings.

2. Party called hears ringtone → presses button to answer the call, both parties engage in a normal conversation.

3. Hang up and hang the receiver when the call ends.

Under normal use and no man-made damage, a one-year free warranty is provided.

2. Handles, hangers, and keyboards for our products are all self-manufactured by our company, with service parts available at any time.

3. Unified Service Hotline: 400-118-2011.