OTS-4T Telephone Optical Transceiver

Product Advantage

• High Stability & Reliability

Based on advanced PCM technology and fully digital design, ensuring stable transmission over long distances.

• Excellent Voice Quality

Supports G.711 PCM encoding with low delay and distortion, delivering clear, high-fidelity voice communication.

• Supports Multiple Interfaces

Compatible with FXS, FXO, magnet, and hotline interfaces, meeting diverse communication needs.

• Flexible Deployment

Compact structure supports desktop, rack-mount, or wall-mounted installation for various scenarios.

• Wide Transmission Range

Using single-mode fiber, supports distances up to 20km / 40km / 80km, depending on optical module configuration.

• Power Options & Safety

Supports AC 220V or DC -48V dual power supply for high reliability.

Technical Parameters

Optical Interface

• Connector: FC / SC / ST (optional)

• Wavelength: 1310nm / 1550nm

• Transmission Distance: 20km / 40km / 80km (optional)

• Optical Coding: CMI / mBnB

• Receiving Sensitivity: ≤ -26dBm

Telephone Interface

• Channels: 4 FXS/FXO

• Impedance:

• FXO: 200Ω + 680Ω || 0.1μF

• FXS: 200Ω + 560Ω || 0.1μF

• Frequency Response: 300Hz–3400Hz (-0.6 to +3dB)

• Connector: RJ11

Voice Encoding

• Standard: ITU-T G.711

• Rate: 64Kbps per channel

• Signaling: 16-slot CAS signaling

Power Supply

• Input: AC 220V (165V265V) / DC -48V (-36V-72V)

• Power Consumption: <15W

Environmental Conditions

• Operating Temperature: -10°C ~ +50°C

• Humidity: ≤95% (non-condensing)

Product Uses

• FTTH / FTTx Voice Access – Extend telephone services over optical fiber networks.

• Enterprise Voice Networks – Cost-effective and secure voice transmission solution for private networks.

• Government & Military Communications – Reliable voice transmission for secure environments.

• Power & Transportation Systems – Stable voice channels for critical infrastructure operations.

• Remote Areas Voice Access – Provide telephony services to rural or remote locations via fiber optic links.

FAQ

Q1: How many telephone channels does OTS-4T support?

A: It supports 4 analog voice channels via RJ11 ports (FXS/FXO).

Q2: What is the maximum transmission distance?

A: Up to 80 km with single-mode fiber and appropriate optical module.

Q3: Does the device support Ethernet or data transmission?

A: No, OTS-4T is designed specifically for voice transmission.

Q4: What power supply options are available?

A: Supports both AC 220V and DC -48V for flexible deployment.

Q5: Can the device work in harsh environments?

A: Yes, it operates in temperatures from -10°C to +50°C, suitable for industrial applications.