1. The system has strong compatibility and supports standard SIP 2.0 (RFC3261) and related RFC protocols.

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

3. Full-duplex intercom function.

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

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 shell with high mechanical strength and strong impact resistance.

8. The housing surface is high-temperature electrostatic spray painting, with good antistatic properties and eye-catching colors.

9. Our company manufactures the handles, hangers, and keyboards for critical components in-house, ensuring strict quality control and rapid after-sales response.

Suited for environments with specific requirements for moisture-proofing, fire-retardant, noise-resistant, dust-proof, and frost-proof, such as subway systems, pipeline tunnels, tunnels, 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 → picks up the handset to answer the call, and both parties engage in a normal conversation.

3. Hang up the receiver after the call ends.