IDM MAP4E1-30 Voice Conference Device

The IDM MAP4E1-30 Hardware Voice Conference Device is a 4-channel E1 voice conference access device developed by Raytrans. It belongs to the PCM equipment series for voice consultation scenarios and is used for service access and cross-connection at the access layer of data communication networks. It connects narrowband services such as 2/4-wire audio, telephone, magneto telephone, common battery telephone, and V.24 data, and performs 64K non-blocking cross-connection of 4 E1 channels and 30-party voice consultation within a single chassis. It is a typical model among integrated service access devices that also provides time-slot cross-connect equipment capabilities.

Key specifications at a glance: 4-channel E1 cross-connection · 30-party conference · hardware-based, no latency · conference room stacking

In the PCM product showcase system, this voice conference device implements conference mixing in hardware without relying on an external server, making it suitable for latency-sensitive dispatching scenarios. Raytrans has long provided core access components to command and dispatch system manufacturers. This model can be embedded in government private network optical fiber communication solutions, military emergency communications vehicle solutions, and smart mining communication solutions, performing time-slot cross-connection and voice aggregation of multiple E1 channels at the PCM equipment level, reducing intermediate links and improving link reliability.

As an integrated service access device, it also serves as time-slot cross-connect equipment. Its 4 E1 channels can be flexibly configured at 64K granularity and support 30-party voice consultation. Conference resources are allocated independently within the chassis, and a standalone unit can fulfill the core functions of a voice conference device, making cross-connection and conferencing capabilities easy to present visually in the PCM product showcase.

Raytrans provides complete selection support from PCM equipment to integrated service access devices. This model can interconnect with the upper-layer platforms of command and dispatch system manufacturers and adapts to government private network optical fiber communication solutions, military emergency communications vehicle solutions, and smart mining communication solutions, enabling unified management of voice conference devices and PCM channels at the access layer.

What Kind of Device Is the IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device?

The IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device is a PCM equipment that combines voice conferencing and narrowband service access in one unit. Both conferencing and service access are implemented inside the device, and 30-party voice consultation does not require an external conferencing server. The IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device performs three tasks at the same time: connecting on-site audio and data narrowband services; performing 64K non-blocking cross-connection over 4 E1 channels to assign each service to the required direction; and organizing the audio terminals that need to be linked into a 30-party voice conference room.

The IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device uses a 19-inch 1U standard chassis. The main board provides 15 service card slots, each card can provide two services, and up to 30 channels of 64K services can be provided. The interface types are determined by the service cards configured for the project. The IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device has complete synchronous timing functions, providing system synchronization for E1 channels and subscriber interfaces. The 4 E1 channels can form point-to-point, chain network, star network, and other structures.

Figure 1: Close-up of the front panel indicator LEDs and 15 service card slots of the IDM MAP4E1-30

What Audio Terminals Can the IDM MAP4E1-30 Connect?

The local end of the IDM MAP4E1-30 Hardware Voice Conference Device can provide access for 30 audio terminals. Terminal types cover analog telephones, switch-side interfaces, radio sets and intercoms, microphones and speakers, and elevator five-party intercom systems. The specific interface types are determined by the configured service cards.

Figure 2: Rear panel E1 interfaces and audio interface terminal arrangement of the IDM MAP4E1-30

A conference room can not only connect local terminals, but also transmit audio to other local audio interfaces through E1 interfaces, so audio interfaces between sites can join the same conference room. The IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device has a gateway configuration function that can add an audio interface to the conference room or remove it from the conference room as required. By default, all parties in the conference room can speak, and a mode can also be set to mute a specific client.

What Core Functions Does the IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device Have?

The functions of the IDM MAP4E1-30 4-Channel E1 Voice Conference Access Device revolve around three threads: narrowband service access, time-slot cross-connection, and hardware voice conferencing.

IDM MAP4E1-30 Technical Specifications

The E1 interface and audio interface specifications of the IDM MAP4E1-30 Hardware Voice Conference Device comply with public recommendations such as ITU-T G.703, PCM30/32, and ITU-T G.711, and the V.24 interface complies with the CCITT V.28 protocol. The following parameters are taken from public information on the same model and public specifications of the same model of integrated service cross-connect multiplexing equipment. The specific configuration is subject to the manufacturer's technical documentation and commercial confirmation.

The E1 time-slot cross-connection among the 4 E1 channels is performed inside the device at 64K granularity, and the 30 audio terminals and data services can be assigned to any E1 channel or intercommunicate between different channels.

What Is the Difference Between a Hardware Voice Conference and an IP Voice Conference Room?

The difference between a hardware voice conference and an IP voice conference room lies in where the voice path is implemented and the operating overhead: the IDM MAP4E1-30 4-channel E1 voice conference access device, as a PCM equipment, performs its conferencing function inside the device in hardware, and the hardware-based voice conference terminal has no delay, with clear and stable sound and convenient control; a server-based IP voice conference room relies on server software and the IP network to carry voice, requiring additional server investment and O&M.

In terms of terminal types and conference scope, the PCM-based voice conference terminal features a wide variety of conference terminals and a large conference scope: the IDM MAP4E1-30 hardware voice conference device can connect analog telephones, magneto telephones, microphones and speakers, radio sets, and elevator five-party intercom systems, and merge remote audio interfaces into the conference room over E1 channels; the conference rooms of multiple devices can be directly stacked into one large conference room.

What Scenarios Is the 4-Channel E1 Voice Conference Access Device Suitable For?

Electric Power and Rail Transit Private Network Dispatch: 4 E1 Cross-Connections and 30-Party Consultation in the Same Chassis

Electric power substations and rail transit stations have numerous and widely distributed dispatch telephones and audio dedicated lines, and the sites are interconnected over E1 channels. The IDM MAP4E1-30 4-channel E1 voice conference access device, as an integrated service access device, directly accesses 30 audio terminals at the access layer and then uses 4 E1 channels for 64K non-blocking cross-connection; for multi-point consultation, the 30-party voice conference room organizes the telephones, microphones and speakers of sites along the line into the same conference, so site voice dispatching does not depend on an external conferencing server.

Petrochemical and Mining Emergency Communications: Half-Duplex Radio Sets Connected to the Telephone Network via Voice Triggering

On-site communications in plants and mines rely heavily on half-duplex devices such as trunking radio sets and radio sets, which require pressing a button to talk and are inherently incompatible with the full-duplex call mode of the telephone network. The EMVOICE24 interface of the IDM MAP4E1-30 hardware voice conference device can directly connect radio sets, trunking intercoms, and access control intercoms. The voice-triggered communication activation function provided by the conference room connects half-duplex communication devices to full-duplex communication networks such as the telephone network, so that calls from on-site radio sets can be brought into the conference call at the command center, and the voice path remains uninterrupted during emergency dispatching.

Elevator IoT and Building Intercom Operation: Unified Dispatching of NKT and VoiceSL

Elevator five-party intercom requires calls among the cable car cabin, equipment room, car top, pit, and duty room. The IDM MAP4E1-30 4xE1 voice conference access device provides an NKT five-party intercom interface for transmitting the five-party intercom system of Otis brand elevators over the network; it provides a VoiceSL five-party intercom module for connecting the five-party intercom of Mitsubishi, Deling, and other brand elevators for transmission and dispatching over the elevator IoT, and the voice terminals for five-party intercom and site voice dispatching can be managed uniformly on the same device.

Conclusion

The IDM MAP4E1-30 4xE1 voice conference access device accomplishes both service access and voice conferencing in a single 19-inch 1U device: 64K non-blocking cross-connection across 4 E1 channels, 30-channel narrowband service access within the same chassis, and 30-party hardware voice conferencing without delay, and it supports conference room stacking and half-duplex radio sets connected to the full-duplex telephone network via voice triggering.