PCM

PCM·📅UpdatedMay 12, 2026·✍️管理员

The IDM-30E Integrated Service Multiplexer adopts a 19-inch 1U standard chassis and provides 30 user interfaces as defined by the standard. It supports AC220V or DC-48V power supply.

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Overview:

　　The IDM-30E Integrated Service Multiplexer uses coaxial cable as the transmission medium to complete the connection between user terminal equipment or between user terminal equipment and the public switched telephone network (PSTN). The IDM-30E Integrated Service Multiplexer utilizes the E1 digital trunk interface or analog subscriber interface resources equipped on the central office switch, extending voice and data services to various user areas through the IDM equipment.

The IDM-30E Integrated Service Multiplexer uses coaxial cable as the transmission medium to complete the connection between user terminal equipment or between user terminal equipment and the public switched telephone network. The IDM-30E Integrated Service Multiplexer utilizes the E1 digital trunk interface or analog subscriber interface resources equipped on the central office switch

Key Features:

Key Features:
Clock modes: Master clock and subscriber clock can be configured to suit various application environments.
Adopts a 19-inch 1U standard chassis. Provides 30 user interfaces as defined by the standard.
Rich 64K user interfaces: Provides ordinary telephone cards with Caller ID (Caller Line Identification Presentation) functionality (FXO, FXS).
The front panel features comprehensive function control switches and alarm indication: When an optical port or E1 interface fault occurs, the corresponding alarm indicator LED on the equipment will illuminate.
Power supply: AC220V or DC-48V.
Power consumption: 20W ±10%.

Technical Specifications:

**E1 Interface Specifications
** Fully compliant with ITU-T G.703 recommendation standards
 Line code: HDB3
 Bit rate: 2048kbit/s±50ppm
 Impedance: 75Ω (unbalanced interface) / 120Ω (balanced interface)
(Note: An external impedance converter is required when using the 120Ω balanced interface)
 Frame structure: PCM30/32
 Signaling: Channel-associated signaling (CAS)
**FXO/FXS Interface Specifications
 Impedance: Triple complex impedance 200Ω+560Ω//0.1μF
 Audio frequency range: 300Hz – 3400Hz
 Compression law: ITU G.711 A-law
 Loop current: 25mA/channel
**Application Solution:

Telephone Optical Terminal