8-Port Phone over E1 PCM Multiplexer (19 Inch)

This product offers 8 telephone lines and is highly versatile in its applications. The electrical component of the device consists of fully digital circuits, ensuring reliable and stable operation, low power consumption, high integration, compact size, and easy installation and maintenance.

● The device provides 8 voice access channels with support for caller ID display and reverse polarity billing function.

● It supports mutual number allocation among various sites.

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

● The voice interface supports FXO and FXS ports, where FXO ports are connected to the PBX and FXS ports are connected to users’ telephones.

● It can detect power loss or E1 failure on the opposite end when the E1 signal is lost, indicated by alarm lights.

● 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 the G.703 recommendation

Rate: 2048Kb/s ±50ppm

Line Code: HDB3

Impedance: Unbalanced 75Ω / Balanced 120Ω (Unbalanced interface can be adapted to 75-2/3 coaxial cable with a coaxial adapter)

Jitter Characteristics: Complies with G.742 and G.823 recommendations.

Input Port Attenuation Range: 0 to 6dBm

● FXS User Telephone Port

Ring Voltage: 75V

Ring Frequency: 25Hz

2-wire input impedance: 600Ω (off-hook)

Return Loss: 20dB

● FXO Trunk Port

Ring Detection Voltage: 35V

Ring 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