PCM

PCM·📅UpdatedMay 12, 2026·✍️管理员

The IDM VR5000 Integrated Service Access Device utilizes 2 standard E1 transmission channels (G.703 standard) and adopts the PCM30/31 format to directly provide various user interfaces such as voice, data, and image. It also features non-blocking timeslot cross-connection between the 2 E1 groups and all user interfaces. Additionally, the device supports multiple clock modes to meet the clock requirements of various application environments.

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I. Overview

The IDM VR5000 Integrated Service Access Device is one of the PCM integrated multiplexing devices designed by our company using dedicated large-scale integrated circuits. It completes the connection between user terminal devices or between user terminal devices and the public switched telephone network through 2M transmission media.

The device utilizes 2 standard E1 transmission channels (G.703 standard) and adopts the PCM30/31 format to directly provide various user interfaces such as voice, data, and image. It also features non-blocking timeslot cross-connection between the 2 E1 groups and all user interfaces. Additionally, the device supports multiple clock modes to meet the clock requirements of various application environments.

The 2 E1 channels on the main control board can be used to expand the number of voice interfaces to 60, and key units can adopt dual-board redundancy backup.

PCM Equipment IDM VR5000 Integrated Service Access Device - IDM VR5000 Device Image

IDM VR5000 Device Image

II. Product Features
19-inch 3U standard chassis with 16 service slots;
Dual 48V power supplies and DXC main control board provide 1+1 hot backup;
The DXC main control board provides user interface access and management, data and signaling cross-connection, system synchronization, and device networking control and management;
The E1 interfaces on the main control board can expand user interfaces. They can connect to PCM equipment from other manufacturers, with 16 timeslots of signaling bits configurable on the main control board. They can also connect to digital program-controlled switch digital E1 signaling such as No.7 and PRI;
Provides a full range of 64K and N*64K interfaces. The service types and quantities can be arbitrarily configured within the chassis, with each slot supporting 8 or 10 channels of 64K services;
Supports FXS/FXO, magneto, 2/4-wire E&M, RS232/RS422/RS485, GSM/CDMA services.

III. Technical Specifications

E1 Interface

Line Rate	2.048Mbps	Line Code	HDB3
Standard Protocol	SupportsITU-T G.703	Impedance	75Ω/120Ω
Frame Structure	PCM30/32	Signaling	Channel-Associated Signaling

Ethernet

Transmission Rate	N×VC12 (N≤50)
Standard Protocol	Supports IEEE802.3	Operating Mode	Full/Half Duplex/Auto-negotiation

FXO, FXS Interfaces

Audio Range	300Hz~3400Hz	Compression	A-law per ITU G.711
Impedance	Triple complex impedance 200Ω+560Ω//0.1μF	Loop Current	20mA/channel

EM2/4-Wire Interface

Audio Frequency Range	300Hz~3400Hz	Impedance	Balanced600Ω
Compression Rate	A-law per ITU G.711	Return Loss	Not less than18dB

V.24 Interface

Transmission Rate

Asynchronous ≤9600bps; Synchronous 64Kbps

Electrical Characteristics

Complies with CCITT V.28 protocol

V.35 Interface

Interface Type	RJ-45	Electrical Characteristics	Complies withITU-T V.35Recommendation
Transmission Rate	n×64Kbps（n=0～31）	Terminal Interface	Complies withISO2593Specification

Power Supply and Power Consumption

Power Supply

DC 12V

Power Consumption

≤12W

Environmental Conditions

Operating Temperature

-20^oC ~+50^oC

Relative Humidity

0~95% (non-condensing)

IV. Application Example

IV. Application Example