I. Functional Overview
1. Wall-mounted installation, aluminum alloy die-cast housing with wall thickness not less than 5mm, strong anti-vandalism capability.
2. Industrial three-proof design, waterproof and dustproof rating meets GB/T 4208-2017 IP68.
3. Supports telephone line signal access, twisted pair interface.
4. Supports free dialing or off-hook automatic dialing, with two sets of one-touch speed dialing configurable.
5. Built-in 2W speaker, supports automatic call answering and broadcast activation.
6. Supports connection to program-controlled switches and PSTN lines, powered by telephone line, no external power supply needed.
7. Supports busy tone detection and call termination.
8. Supports both handset and hands-free calling modes.
9. Supports custom function key settings, including hands-free, speed dial, redial, flash, volume adjustment, etc.
10. Features fluorescent backlit keyboard, meeting dialing needs in low-light conditions.

II. Operation Guide
1. Off-hook/On-hook Method: Controlled via handset; off-hook connects the call, on-hook disconnects.
2. Answering Calls: When there is an incoming call, the phone rings; pick up the handset to communicate, and hang up after the conversation.
3. Making Calls: Pick up the handset and dial as with a standard telephone to communicate with the other party.

III. Main Technical Parameters
1. Supports connection to 24-60V program-controlled switches and PSTN lines.
2. Temperature: -40℃ to 75℃; Relative Humidity: 10% to 95%; Atmospheric Pressure: 86 to 106 Kpa; Ambient Noise: ≤100dB(A) 
3. Ringer Volume: ≥105dB with door open; ≥85dB with door closed.
4. Supports standard SIP 2.0 protocol, waterproof gland RJ45 interface.
5. Powered by telephone line, no external power supply required.
6. Built-in speaker standard 2W, customizable from 2W to 5W.



IV. Packaging Details
Unit Dimensions: 355*260*130 (mm)
Master Carton Dimensions: 439*277*191 (mm)
Packaging Materials: EPE foam, carton
Gross Weight: 7KG
Net Weight: 6KG