KDS-E1O30 is a highly integrated E1 PCM Voice Multiplexer, designed specifically to aggregate 30 telephone channels (FXS/FXO) onto a single E1 digital trunk line for transmission.

The device's core circuitry employs a full digital design, ensuring reliable and stable operation. It features high integration, low power consumption, and is easy to install and maintain. It is available in flexible 1U 19-inch rack-mount and 6U rack-mount card configurations.

KDS-E1O30 is widely used by enterprises leasing E1 lines, helping customers flexibly provision multiple voice services on their existing E1 links to achieve low-cost or even free voice communication between headquarters and branch offices.

1. Utilizes proprietary intellectual property (IP) high-performance integrated circuits to ensure stable and reliable equipment operation.
2. The E1 interface fully complies with ITU-T G.703 recommendations and features built-in all-digital clock recovery and smooth phase-locked loop (PLL) technology.
3. Provides 30 voice channels, with full-channel support for Caller ID and Reverse Polarity Billing functions.
4. Flexible support for FXO (for interfacing with PBX/CO switches) and FXS (for connecting user telephones) interfaces, with an option for EM2/4 audio interfaces.
5. Supports 1U 19-inch rack-mount configuration with an independent SNMP network management module; also features a 6U 13-slot rack-mount card option for centralized SNMP network management functionality.
6. Supports far-end (remote) alarm status monitoring and automatic routing for inter-site dialing.
7. Equipped with intelligent fault diagnosis, capable of precisely distinguishing whether E1 signal loss is caused by far-end device shutdown or line failure (E1 link discontinuity).
8. All telephone interfaces include built-in high-standard lightning protection, meeting the GB/T17626.5 (6KV) standard for effective equipment safety.
9. Offers multiple power supply options, including AC220V, DC-48V, and DC24V, to adapt to different equipment room power environments.

◆ E1 Interface

Standard Compliance	Compliant with G.703 Recommendation
Rate	2048 Kb ± 50 ppm
Code Type	HDB3
Impedance	Unbalanced 75 Ω/ Balanced 120 Ω (Unbalanced interface requires coaxial adapter for 75-2/3 coaxial cable)
Jitter Characteristics	Meets G.742, G.823 Recommendations
Input Attenuation	0 dBm ～ 6dBm

◆ FXS Subscriber Interface

Ringing Voltage	75 V
Ringing Frequency	25 Hz
2-Wire Input Impedance	600Ω (Off-hook)
Return Loss	≥20 dB

◆ FXO Trunk Interface

Ringing Detection Voltage	35 V
Ringing Detection Frequency	17 Hz - 60 Hz
2-Wire Input Impedance	600Ω (Off-hook)
Return Loss	≥20 dB

◆ E&M 2/4 Wire Audio Interface

E&M Type	TYPE V
E-Wire Max Current	22 mA; Saturation Voltage: 3 V
M-Wire Constant Current	7 mA; Min Detection Current: 5 mA
A/D Gain	0 dB
D/A Gain	0 dB
2/4 Wire Input Impedance	600Ω

◆ Magneto Telephone Interface

Ringing Detection Voltage	35 V
Ringing Detection Frequency	17 Hz - 60 Hz
2-Wire Input Impedance	600Ω (Off-hook)
Return Loss	≥20 dB

◆ Electrical and Mechanical Characteristics

System Power

AC 180 V∼260 V; DC −48 V; DC +24 V

Power Consumption

≤10 W

Dimensions/Form Factor

485(L)×140(W)×45(H) mm

(1U 19-inch Rack-mount)

◆ Environmental Index

Operating Temperature	−10∘C∼+60∘C
Storage Temperature	−40∘C∼+85∘C
Operating Humidity	0%∼95% (Non-condensing)
MTBF (Mean Time Between Failures)	>100,000 hours

30 port fxs/fxo pcm multiplexer

Product Categories

30-port FXS/FXO PCM Multiplexer

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