I. Function Overview
1. Wall-mounted installation, aesthetically pleasing appearance, designed to be anti-vandalism and weatherproof.
2. Made of cast aluminum alloy with a wall thickness of not less than 5MM, surface treated with spray coating process.
3. Waterproof, dustproof, and moisture-proof design, with an IP66 protection rating.
4. Supports connection to digital program-controlled exchanges and public telephone lines.
5. Supports off-hook free dialing or setting off-hook automatic dialing.
6. Supports busy tone detection and call termination.
7. Supports setting automatic answer mode for incoming calls.

II. Operation and Usage
1. Off-hook/On-hook method: Handset-controlled off-hook/on-hook method, off-hook for connection, on-hook for disconnection;
2. Answering calls: When there is an incoming call, the telephone rings; pick up the handset to communicate with the other party, and hang up the handset after the call ends;
3. Making calls: Pick up the handset, manually dial or wait for automatic dialing, wait for the other party to respond, and communicate with them;

III. Main Technical Parameters
1. Wiring terminal is twisted pair, inlet is a waterproof gland interface.
2. Supports connection to 24-60V digital program-controlled exchange power supply.
2. Operating temperature: -35℃~70℃; Relative humidity: 10%~95%
Atmospheric pressure: 86~106 Kpa; Ambient noise: ≤100dB(A) 
3. Ringing sound level: ≥90Db 
4. Power supply: Powered by exchange feed.

IV. Packaging Dimensions
Machine dimensions: 308*188*134mm
Packaging materials: Pearl cotton, carton
Gross weight: 5KG
Net weight: 4KG

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.