Specification: 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 O (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 O (three components) 13.User line loop resistance: less than 1KO (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: 10/100M/1000Mbps, full duplex, half duplex fully adaptive 2. Protocol: Support IEEE 802.3, IEEE 802.1Q (VLAN) 3. Physical interface: RJ45, support AUTO-MDIX (cross line straight line adaptive) Power supply: 1.Working voltage AC100~240V, DC5V/2A. 2.With US power supply adapter Package include: 1x Telephone over fiber Transmitter 1x Telephone over fiber Receiver 1x 3M SC/SC fiber patch cord. 2 x External power supply adapters 1 x Manual

Simple to Install, Plug and Play. Note: the P1 & P2 is usable. P3 & P4 is useless (empty). Compact design. Sturdy Metal outer box, Bilateral heat dissipation make working life longer. LEDs for power supply and optical fiber link, data status indication can monitor the operating status of the system. With our Telephone over Fiber extender you can get faster speeds, less signal degradation, longer distance data transfer, better reliability, and more flexibility. Using a fiber optic cable can decrease costs over time because of the durability and reliability of the fiber cables. Fiber optic cables carry a low rate of bit error due to the fiber being highly resistant to electromagnetic interference. Support Called id, Ring and Fax function, No Delay Transmission and Protocol Support: Unlike VoIP products - these converters transmit signals directly over fiber cables, thus offering NO DELAYS, plus support for fax & legacy applications that is not supported by VoIP lines. Extend PCM Voice Telephones and Network signal: 2 Independent telephone lines + 1 Gigabit Ethernet (10/100/1000 Mbit/s) port through same fiber optic cable to far end. Suitable for Both Fiber Types (Single-mode and multimode). Single-mode fiber for a long distance up to 20 km(12miles), Multimode fiber for a distance up to 500m(0.31miles).