30-Channel FXO/FXS over E1 PCM Multiplexer

This 1U 19-inch rack-mounted PCM multiplexer can provide 30 channels of telephone output. The device uses all-digital circuits, ensuring reliable and stable operation, low power consumption, high integration, small size, and easy installation and maintenance.

● The device is capable of monitoring the alarm status of the remote end.

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

● Voice interface supports FXO and FXS ports, as well as EM2/4 audio interfaces. FXO ports connect to PBX, while FXS ports connect to user telephones.

● It supports calling number display and reverse polarity billing function.

● It supports mutual dialing function between various sites.

● The device is able to detect whether the remote device is powered off or the E1 is not working when the E1 signal is lost.

● Multiple power supply options, such as AC220V, DC-48V/DC24V, etc.

● The device is a 1U rack-mountable unit with independent SNMP network management.

● 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: 0dB

2/4-wire Impedance: 600 Ohm

Return loss: 20 dB

● 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)