I. Function Overview
1. Wall-mounted installation with an aesthetically pleasing appearance.
2. BMC forged shell with waterproof and dustproof rating up to IP66.
3. Explosion-proof marking: Ex nA ic IIB T6.
4. Supports SIP 2.0 protocol, capable of registering two SIP accounts.
5. Supports free dialing or automatic dialing upon off-hook.
6. Supports busy tone detection for call termination.
7. Works with SIP servers to enable group calls, intercom, recording, and other functions.

II. Operation and Usage
1. Off-hook/On-hook method: Handset-controlled method, off-hook for connection, on-hook for disconnection.
2. Answering calls: When there is an incoming call, the phone rings; pick up the handset to communicate, and hang up the handset after the call ends.
3. Making calls: Pick up the handset and operate as with a standard telephone to dial and communicate.
4. One-touch speed dial: Lift the handset and press the corresponding speed dial key for one-touch quick dialing.

III. Main Technical Parameters
1. Supports connection to various types of network switches and SIP broadcast dispatch servers.
2. Temperature: -40℃~75℃ Relative humidity: 10%~95% Atmospheric pressure: 86~106 Kpa Ambient noise: ≤100dB(A) 
3. Ringer sound level: ≥120Db 
4. Supports standard SIP 2.0 protocol, with waterproof and explosion-proof gland RJ45 interface.
5. Explosion-proof marking: Ex nA ic IIB T6
6. Speed dial numbers: No less than 2 groups.
7. Power supply: Supports POE power supply or DC12V1 and AC power supply.

IV. Packaging Dimensions
Unit dimensions: 355*260*130 (mm)
Outer box dimensions: 439*277*191 (mm)
Packaging materials: EPE foam, carton
Gross weight: 8KG
Net weight: 7KG

V. Support and Service
Under normal use, excluding human damage and natural disasters, 14 months free warranty;
All accessories are produced long-term and kept in stock. After the warranty period, we still provide product after-sales service.