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

2. Supports single-button direct call to dispatch console; the three function keys can be set freely.

3. Full-duplex intercom function.

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

5. Phone case design with waterproof and dustproof features, 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 housing, high mechanical strength, and strong impact resistance.

8. The shell surface is high-temperature electrostatic spraying, offering good anti-static properties and eye-catching colors.

9. All critical components, handles, hangers, and keyboards are manufactured in-house by our company, with stringent quality control and swift after-sales response.

Suited for environments with special requirements for moisture-proof, fire-resistant, noise-proof, dust-proof, and frost-proof in places such as subway systems, pipeline tunnels, tunnels, highways, wind farms, oil stations, docks, and steel mills.

Usage Instructions:

1. Register on the server, set the corresponding numbers for the three speed-dial keys via the WEB, and then quickly dial the respective phone number by pressing the corresponding speed-dial key after lifting the handset during a call.

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

3. End the call and hang up the receiver.