Features:

1. High quality PCM voice telephone Modular design, stable and reliable performance
2. Support Protocol: IEEE 802.3, IEEE 802. 1Q (VLAN)
3. Transmission bandwidth: 10-100Mbps (per network port) full duplex, half duplex fully adaptive
4. Adopt traditional PSTN normal voice, each voice occupies a 64K channel, support caller ID and fax.
5. Compact design, beautiful appearance and convenient installation and operation.
6. Complete status display function for easy maintenance and management.
7. Single-mode and multi-mode adaptive, simplex SC interface
8. Working distance : singlemode fiber 0~20Km, and compatible with Multimode fiber 0~500meters.

Phone RJ11 port specifications:

1. Voice coding: PCM coding, 64Kbps per voice
2. Crosstalk attenuation: ≥65dB
3. Balanced noise: ≤63.7dBmop
4. Insertion loss: -3 ± 0.75dB
5. Frequency characteristics: 300 to 3400 Hz (-0.6 to +3 dB)
6. Relay port (FXO): connected to the switch
7. Two-wire AC input impedance: 200+680//0.1 Ω (three components)
8. Ringing voltage: 35 ~ 150V
9. Ringing frequency: 17~60HZ
10. Return loss: 20 db
11. User Interface (FXS): Connect to the user's telephone
12. Two-wire AC input impedance: 200+680//0.1 Ω (three components)
13. User line loop resistance: less than 1KΩ (including phone)
14. Ringing voltage peak-to-peak value: 110~150V
15. Ringing frequency: 22~28HZ
16. Feed voltage: 28V
17. Feed current: 20~50mA;
18. Return loss: 20 db
19. Bell flow: AC90 plus or minus 15V

Ethernet RJ45 port specifications:

1.   Rate: 10M/100M, full duplex, half duplex fully adaptive
2.   Actual transmission bandwidth: 50Mbps per network port
3.   Protocol: Support IEEE 802.3, IEEE 802.1Q (VLAN)
4.   Physical interface: RJ45, support AUTO-MDIX (cross line straight line adaptive)

Power supply: 

1. Suitable working voltage AC100~240V, DC5V/2A. 
2. US/EU/UK/AU power supply adaptor is available.

Applicable environment:

Major communication operators, governments, enterprises and institutions.

Package include: 

• 1x 4CH PCM telephone Transmitter 
• 1x 4CH PCM telephone Receiver
• 2xpower supply (US/EU/UK/AU optional)
• Manual