30Voice + FE over E1 PCM Multiplexer

The device provides one E1 interface, 30 telephone outputs, and an optional 64K Ethernet interface (or 29 telephone outputs + one 128K Ethernet interface or other combinations). The device is fully digital and has reliable and stable operation, low power consumption, high integration, small size, and easy installation and maintenance.

photos of pcm multiplexer

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

● Voice port supports FXO/FXS/2&4-wire EM/2&4-wire audio/magnetic telephone interfaces. The FXO port is connected to the PBX, and the FXS port is connected to the user’s telephone.

● It provides one expansion interface that can expand one asynchronous data such as RS232/RS485/RS422/Manchester code, etc.

● Ethernet interface rate is 10/100M, full/half duplex adaptive.

● It supports caller ID display, reverse polarity charging, and fax function.

● It supports the mutual dialing function of both sides.

● It can detect whether the remote device is powered off or the E1 is not connected when the E1 signal is lost.

● It supports 3 configurations: 30*telephone + 1 64K Ethernet, 30*telephone + 1 serial port, 29*telephone + 1 128K Ethernet, 29*telephone + 1 64K Ethernet + 1 serial port.

● It provides 2 clock types: E1 master clock and E1 line clock;

● It provides 3 loopback functions: ANA (local loopback), DIG (Ethernet interface loopback to the remote end), and REM (remote Ethernet interface loopback to the local end).

● It has a 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 mode options: AC220V, DC-48V/DC24V and so on.

● The telephone interface is equipped with lightning protection, which can withstand short-circuit current wave 10/700μs and open-circuit peak output voltage 6KV, in accordance with the GB/T17626.5 (IEC61000-4-5) standard.

● 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: 0dB

2/4-wire Impedance: 600 Ohm

Return loss: 20 dB

● Ethernet Interface (10/100M)

Rate: 10/100 Mbps, half/full duplex auto-negotiation

Standard: Compatible with IEEE 802.3, IEEE 802.1Q (VLAN)

MAC Address Table Capacity: 4096

Connector: RJ45, support Auto-MDIX

● 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 1 of pcm multiplexer

Typical solution 1——- Ordinary voice Access

application 2 of pcm multiplexer

Typical solution 2——- Hotline Access

application of 30ch voice over e1 pcm multiplexer