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Based on the actual conditions of tunnel sections, the tunnel emergency telephone and broadcasting system overcomes previous system deficiencies. It integrates emergency intercom, broadcasting, audio playback, and alarm video linkage into a professional multimedia emergency communication and broadcasting system. This system deeply integrates with tunnel management operations and models, enhancing the information and intelligence levels of tunnel operations, thereby improving daily management efficiency and emergency response capabilities.
Suitable for use in locations such as tunnel,highway,parking areas,entrances, railway and metro platforms and other transportation facilities.

| Basic Features | |
| Waterproof Rate | IP65 |
| Noise cancellation | Optional |
| Full-duplex communication | Support |
| Enclosure Material | Stainless Steel |
| Frequency band | 100Hz-16KHz |
| Amplifier Output | 120W/240W/350W; Output method: 4-6 ohms, 70V/100V |
| Operating Temperature & Humidity | -40°C to +70°C |
| Mean Time Between Failures | More than 50,000 hours |
| VoIP Features | |
| Protocol | SIP 2.0(RFC3261) |
| Registration line | 6 lines at same time |
| Codec | G.711A/u, G.7231 high/low, G.729.G.722, G.726 |
| Echo cancellation | Supports G.168, Handsfree up to 96ms |
| Network | 10/100 Mpbs WAN/LAN: Support bridge mode Support virtual LAN Support stun NAT penetration |

Maritime

Highway / Tunnel

Railway

Power - Station

Mining industry

Industrial park
| Package | |
| Packaging materials | corrugated box, pearl cotton lining |
| Weight | Net weight : about 7 KG / Gross Weight :8 KG |