1. The system boasts strong expansion compatibility, supporting standard SIP 2.0 (RFC3261) and related RFC protocols.

2. Features single-button direct dial to dispatch console; 2 functional keys can be set as desired.

3. Full-duplex intercom function; incoming call with audio and visual alerts.

4. Speaker and microphone sensitivity are adjustable; optional voice encoding methods include G.729, G.723, G.711, G.722, and G.726.

5. Telephone Case Design: Waterproof, dustproof, no need for a waterproof cover, both aesthetically pleasing and practical.

6. The internal circuit of the telephone uses a universal double-sided integrated circuit, featuring accurate dialing, clear conversation, and stable operation.

7. Aluminum alloy die-cast shell, high mechanical strength, strong impact resistance.

8. The outer shell surface is high-temperature electrostatic powder coating, with excellent antistatic properties and eye-catching colors.

9. Our company independently produces key components such as handles, hangers, and keyboards, ensuring strict quality control and a quick response to after-sales feedback.

Applicable to environments with special requirements for moisture-proof, fire-resistant, noise-proof, dust-proof, and frost-proof in subway systems, tunnels, pipelines, highways, power plants, gas stations, docks, and steel mills.

Usage Instructions:

1. Register on the server and make phone calls according to the server's dialing rules.

2. The called party hears the ringtone → lifts the handset to answer the call, and both parties engage in a normal conversation.

3. End the call and hang up the receiver.