Telephone multiplexer

Overview

16 Channel Telephone Optical Multiplexer(RJ11) is developed by Beijing Fibridge Co., Ltd. using large-scale integrated circuits with independent intellectual property rights. It encodes various channels of telephone signals for transmission over a single optical fiber. This device features a 1U chassis design, high integration, compact size, low power consumption, reliable operation, and convenient installation and use.

feature

1. Provides 1 channel optical port(speed rate 155M)

2. Provides 16 channels telephone(Optional from Magneto and hotline)

3. Built-in power supply 220VAC or 48VDC

4. Single or dua fibers for options. Default is single fiber.

5. Optical transmission distance is SM20km, up to 120km

6. 1U chassis device.

Technical Specifications

1. Optical port

Wavelength: 1310nm (standard model) or 1550nm  

Transmission Power: ≥ -12dBm  

Receiving Sensitivity: ≤ -30dBm (BER ≤ 10⁻¹¹)  

Connector Type: FC (standard model) or SC, etc.  

Transmission Mode: Dual-fiber or Single-fiber

2. Voice Channel Interface and Signaling

Exchange Side

Off-hook Impedance: < 500Ω

On-hook Impedance: > 10KΩ

User Side

Loop Resistance: ≤ 2000Ω (including telephone)

Idle Circuit Voltage: ≤ 50V

Loop Current: 25mA

Off-hook Threshold: 8mA

Polarity Reversal Delay: < 50ms

Dialing: Pulse dialing single pulse distortion < 5ms; In-band audio dialing total distortion meets voice interface characteristics

Off-hook Delay: < 100ms

Ringing Current:

Remote (FXS) Ringing Current Generator

Frequency: 25 Hz ± 3 Hz

Amplitude: 75V ± 5Vrms

Ringing Current Delay: < 50ms

Total Output Power: ≤ 10W (per chassis)

Local (FXO) Ringing Current Detection

Amplitude Range: Minimum 38Vrms

Voice Interface

Impedance: 600Ω or three-element compound impedance

Audio Frequency Range: 300-3400 Hz

Coding Law: CCITT Recommendation G.711 A-law

3. Power consumption

Whole device power consumption: <15W

4. Working Environment

Operating Temperature: 0～45℃  

Relative Humidity: ≤95% (at 25℃)  

Specifications