1. The scope of supply: AC100 ~ 265 v
2. Network communication protocol: TCP/UDP/ARP, ICMP/IGMP/SIP
3. The network transmission rate: 100 m
4. Audio coding: PCM/ADPCM/G711
5. The recording sampling rate: 8 k ~ 48 KHZ
6. Play the sampling rate: 8 k ~ 48 KHZ
7. The intercom sampling rate: 16 KHZ
8. Audio bit rate: 8 k ~ 320 KBPS (intercom ≦ 64 KBPS)
9. SNR/frequency response: > 65 db / 200 hz ~ 5000 hz (intercom), > 80 db / 100 hz ~ 16 KHZ (radio)
Nonlinear distortion: 10. 1% or less (1 KHZ, 10 db)
11. Environmental noise: under the environmental noise of 110 db calls resolution acuity 95%;
12. Grounding resistance: 10 or less Ω;
13. The intercom latency: < 100 ms;
14. The use of the environment: working temperature: - 40 ℃ ~ 70 ℃;
15. Work humidity: 10 ~ 95% RH (condensation);
16. Storage temperature: - 40 ~ 85 ℃;
17. Storage humidity: 5 ~ 90% RH (condensation);
18. Reliability requirements: 8 kv, electrostatic air contact 6 kv; Surge common-mode 4 kv, differential mode 2 kv (power & network); Class B
19. The average time between failures (MTBF) : 500000 hours or more
20. IP protection grade: IP65
21. Or: length * width * thickness: 400 * 290 * 86 mm (not warning lamp and waterproof connector size)
