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Devices & Software for audio distribution over IP networks
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 E351


 

 

Main Features:

E351 unit is a single channel high quality audio, single channel asynchronous serial data and 8 ON / OFF contacts transceiver over IP networks.

This equipment has been specially designed for PA systems over IP networks. It can be used as well with intercom systems, access control, tunnels and, in general, in those installations where the transmission of high quality audio, serial data or contacts is required.


 

Description and functionality

E351 unit is a single channel high quality audio, single channel asynchronous serial data and 8 ON / OFF contacts transceiver over IP networks.

This equipment has been specially designed for PA systems over IP networks. It can be used as well with intercom systems, access control, tunnels and, in general, in those installations where the transmission of high quality audio, serial data or contacts is required.

The most important characteristics of the system are as follows:

  • High quality transmission of one audio signal (20-20000 Hz bandwidth, SNR >70 dB)
  • One RS-232, RS-422 or RS-485 serial data channel
  • 8 input and output dry contacts.
  • Easy configuration via Web server or Telnet.
  • Possibility of sending the audio, serial data and contacts to up to 5 different destinations at the same time.
  • Internal firmware update through the Ethernet network.
  • Highly robust: Operating temperature range: -40 to 74 ºC
  • Power supply range: from 12 to 24 Vdc.
  • Consumption: less than 5 W.
  • Different formats available: for rack mounting, stand alone or DIN rail.

 

The following figure depicts a general diagram block of the system:

 

There are three subsystems within the E351 unit that operate almost independently one from each other: audio, serial data and contacts.

The three subsystems share the same Ethernet connection and the same configuration servers.

Each subsystem contains an Ethernet data receiver (server) that can be associated with a multicast group and up to five transmitters (clients), in order to send data to five different destinations simultaneously.

The communication can be made either to other E351 units or to other systems: computers or other systems connected to the Ethernet network.

The communication protocols used are standard in some cases (such as audio) but sometimes are proprietary of EQUITEL.  

Should it be necessary, EQUITEL may supply a software development kit (SDK) with the necessary technical documentation (for example, in order to integrate E351 in management systems such as SCADA). If so, you may apply for it through our sales department or the email This email address is being protected from spambots. You need JavaScript enabled to view it.

EQUITEL also offers a demo application for controlling several E351 and send audio from a PC.

Likewise, EQUITEL can develop custom-made control applications following the customers’ needs.

Sample applications

Please find below two possible examples where our systems can be used:

The following figure depicts a system composed by a PC transmitting to several zones controlled by the E351:

 

In this case, the PC must run software capable of communicating with the equipments for its management (zones activation control using contacts or serial port) and for sending audio.

In the following figure it is shown a system composed by several E351 with bidirectional communication among all of them:

In this case, once the equipments are properly configured, the communication is established directly between them automatically.