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30-Channel Telephone over E1 PCM Mux (1+1 Backup Protection)

View : 1,079
Type : E1 PCM Multiplexer
Description :

This Telephone over E1 PCM mux provides 2 E1 accesses, 1+1 backup protection, and 30 telephone outputs.


This Telephone over E1 PCM mux provides 2 E1 accesses, 1+1 backup protection, and 30 telephone outputs.

The device adopts all-digital circuits, ensuring reliable and stable operation, low power consumption, high integration, small size, and easy installation and maintenance.


E1 interface complies with the G.703 recommendation and uses all-digital clock recovery and smooth phase-locked loop technology.

The Telephone over E1 PCM mux provides main/backup functions with two 1+1 backup E1 interfaces. When the main E1 is interrupted, the backup E1 ensures uninterrupted service.

The voice port supports FXO/FXS/2/4-wire EM/2/4-wire audio/magnetic phone. The FXO port connects to the PBX, while the FXS port connects to the user’s telephone.

Supports calling number display, reverse polarity billing, and fax functions.

The telephone interface supports mutual dialing functions between various sites.

Can detect whether the remote end device is powered off or the E1 is not working when the E1 signal is lost.

Two clock modes are available: E1 master clock, E1 line clock;

3 loopback functions are provided: E1 local loopback (ANA), Ethernet interface remote loopback (DIG), and command to the remote End Ethernet Interface to Loopback (REM).

Pseudo-random code testing function (PATT), which is convenient for line commissioning and can be used as a single E1-bit error tester.

Multiple power supply options are available: AC220V, DC-48V/DC24V, etc.; it supports AC+DC; AC+AC; DC+DC and other dual power backup modes.

The telephone interface comes with lightning protection, meeting the GB/T17626.5 (IEC61000-4-5) short-circuit current wave 8/20μs and open-circuit peak output voltage 6KV standards.


● E1 Interface

Standard: comply with protocol G.703;

Rate: n*64Kbps±50ppm;

Line Code: HDB3;

E1 Impedance: 75Ω (unbalance) 120Ω (balance);

Jitter Performance: In accord with protocol G.742 and G.823

Input Port Attenuation Allowed: 0~6dBm


FXS Phone Port

Ring voltage: 75V

Ring frequency: 25HZ

2-wire Impedance: 600 Ohm (off-hook)

Return loss: 40 dB


● FXO Trunk Port

Ring detection voltage: 35V

Ring detection frequency: 17HZ-60HZ

2-wire Impedance: 600 Ohm (off-hook)

Return loss: 40 dB


● EM 2/4 Wire

AD: 0dB

DA: -3.5dB

2/4-wire Impedance: 600 Ohm

Return loss: 20 dB


● Power Supply

Power supply: AC180V ~ 260V; DC –48V; DC +24V

Power consumption: ≤10W


● Dimension          

Product Size: 19inch  485X200X45mm(WXDXH)

Simple packaging: 9inch  522X198X82mm(WXDXH)

Piece Weight: 2.4KG


● Working Environment

Working temperature: -10°C ~ 50°C

Working Humidity: 5%~95 % (no condensation)

Storage temperature: -40°C ~ 80°C

Storage Humidity: 5%~95% (no condensation)


application of Voice fxofxs over E1 PCM Mux


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