8*Telephone + 4*RS232 over E1 PCM Multiplexer (Desktop Type)

This device is a mini-sized equipment that provides 8 telephone outputs, with an optional configuration of 4 RS232 ports. The electrical components of the device are fully digital, ensuring reliable and stable operation. It has low power consumption, high integration, compact size, and is easy to install and maintain.

● It can monitor the alarm status of the remote end.

● The E1 interface complies with the G.703 recommendation and utilizes digital clock recovery and smooth phase-locking techniques.

● The voice interface supports FXO ports and FXS ports, EM2/4 audio interfaces. FXO ports connect to PBX systems, while FXS ports connect to users’ telephones.

● It supports 8 channels of voice access, including features such as caller ID and reverse polarity billing.

● It supports dialing between different sites.

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

● It offers two clock modes: E1 primary clock and E1 line clock.

● It provides three loopback functions: ANA (Analog Network Analyzer), DIG (Digital Network Analyzer), and REM (Remote Network Analyzer).

● It has a pseudo-random code testing function (PATT), which facilitates line activation and can be used as an E1 bit error tester.

● It supports multiple power supply options: AC220V, DC-48V/DC24V, etc.

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

● E1 Interface

Interface: Complies with G.703 recommendation

Speed: 2048Kb/s ±50ppm

Line Code: HDB3

Impedance: Unbalanced 75Ω/Balanced 120Ω (Unbalanced with coaxial interface adapter, compatible with 75-2/3 coaxial cables)

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

● E&M 2/4-wire Audio

E&M Type: TYPE V

E-line Maximum Current: 22mA; Saturation Voltage: 3V

M-line Constant Current: 7mA; Minimum Detectable Current: 5mA

AD Gain: 0dB

DA Gain: 0dB

2/4-wire Input Impedance: 600Ω

● Magnet Telephone

Ringing Voltage: 75V

Ringing Frequency: 25Hz

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

Return Loss: 20dB

● Serial Interface

Standard: EIA/TIA-232 RS-232 (ITU-T V.28)

Serial Port Interface: RS-232: RXD TXD Signal Ground

Physical Interface: RJ45

● Environmental Indicators

● 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