2 Port POTS Telephones Over Fiber Optic Extender, PCM Landline Phone to Fiber Converters, Optical ST Singlemode 20Km,Support Called id, Ring and Fax

Phone RJ11 port specifications:
1.Ring current voltage: 150 VRMS
2.Ringing voltage: typical 75V, 90Vmax,
3.Ringing frequency: 17~60HZ
4.Two-wire input impedance: 200R+680R//0.1uF (adjustable to 600 Ω)
5.Return loss: 20 db
6.Idle channel noise : 75 Db
7.Common mode rejection ratio：60-70 CMRR
8.User Interface (FXS): Connect to the user’s telephone
Power supply:
1. Suitable working voltage AC100~240V, DC5V/1A.
2. US/EU/UK/AU standard power supply adaptor is optional.
Other index
Working temperature -20°C ~70°C
Storage temperature -40°C ~85°C
MTBF>100,000hours
Product size: 104*104*28mm(LxWxH)
Weight: 0.8Kg/set
Package include:
1. 1x 2 port POTS telephone Transmitter
2. 1x 2 port POTS telephone Receiver
3. 2xExternal power adapter
4. User Manual
Extend POTS Telephones and Network signal by fiber: 2 Independent POTS telephone lines and 1 10/100 Mbit/s Ethernet port over same fiber optic cable to remote end
Suitable for Both Fiber Types (Single-mode and multimode). Single-mode fiber distance up to 20 km(12.4 miles), Multimode fiber distance up to 500m(0.31 miles)
Uncompressed and No Delay Transmission and Protocol Support, High fidelity speech. Support Called id, Ring and Fax function
Professional High Quality and Excellent performance, Voice quality is clear and stable. Widely used in government units, electric power, public security, military, civil aviation, maritime, mining, highway and other college networks or public networks.
LEDs for power supply and optical fiber link, data status indication can monitor the operating status of the system
Plug and play,No need to set up