TF120M is a small, lightweight, easy-to-install optical transmission device that provides 4 E1 interfaces and 1 RS232 interface. It is suitable for small-capacity exchange networking, user loop network, mobile communication (base station), dedicated network, DDN network, etc.
This manual describes the TF120M Mini Light Transfer Equipment, a compact optical transmission unit with four E1 interfaces and one RS232 interface. It outlines the main features, technical specifications, power requirements, and environmental limits.
Installation procedures, interface wiring details, and common fault troubleshooting are covered, along with a list of supplied accessories and warranty information. This manual is written in Japanese.
| Optical Power | -8 dBm to -13 dBm |
|---|---|
| Receiver Sensitivity | -36 dBm |
| Optical Connector Types | SC, FC |
| Wavelength | 1310 nm (single‑mode) or multimode |
| Interface Impedance | 75 Ω (balanced) |
| RS232 Baud Rate | < 19200 bps |
| Power Supply (AC) | AC 180‑240 V |
| Power Supply (DC) | 48 V (36‑72 V range) |
| Power Consumption | 5 W |
| Operating Temperature | 0 °C to 50 °C |
| Storage Temperature | -40 °C to +70 °C |
| Relative Humidity | 59 % to 95 % |
| Dimensions | 200 mm × 145 mm × 35 mm |
The TF120M provides four E1 interfaces.
The RS232 connector uses a DB9 (9‑pin) style.
It can be powered from AC 180‑240 V or DC 48 V (36‑72 V range).
The device operates between 0 °C and 50 °C.