4-Port FXO/FXS over E1 PCM Multiplexer (19 Inch)

This device offers 4-port telephony and is highly versatile in its application. It features comprehensive alarm functions and operates with stability and reliability.  It has low power consumption, high integration, and compact size.

● The device supports 4-channel voice access with caller ID and reverse polarity billing function.

● It Supports mutual dialing between different sites.

● The E1 interface complies with the G.703 recommendation, utilizing full digital clock recovery and smooth phase-locked loop technology.

● The voice interface supports FXO ports and FXS ports. FXO ports connect to the PBX (Private Branch Exchange), while FXS ports connect to the user’s telephones.

● It can detect power loss or E1 failure at the remote end when the E1 signal is lost, indicated by the alarm LED.

● Multiple power supply options available: AC220V, DC-48V/DC24V, etc.

● DC-48V/DC24V power supply features automatic polarity detection, eliminating the need to distinguish between positive and negative poles during installation.

● E1 Interface

Interface: Complies with G.703 recommendation

Speed: 2048Kb/s ±50ppm

Line Code: HDB3

Impedance: Unbalanced 75Ω / Balanced 120Ω.

Jitter Characteristics: Meets G.742, G.823 recommendations.

Input Attenuation Range: 0 to 6dBm

● FXS User Telephone Port

Ringing Voltage: 75V

Ringing Frequency: 25Hz

2-wire Input Impedance: 600Ω (off-hook)

Return Loss: 20dB

● FXO Trunk Port

Ringing Detection Voltage: 35V

Ringing Detection Frequency: 17Hz-60Hz

2-wire Input Impedance: 600Ω (off-hook)

Return Loss: 20dB

● Environmental Index

Operating Temperature: -10°C to +60°C

Storage Temperature: -40°C to +85°C

Operating Humidity: 0% to 95% (non-condensing)

MTBF: >100,000 hours