Supplementary equipment of DCN16U switchboard

Module E1

It is intended for conversion of one TDM flow into E1 flow in order to interconnect DCN16U switchboards using standard network equipment (modems, multiplexers, etc.). It is installed inside DCN16U housing as baseboard submodule. Signals of E1 lines are sent to connector block of subscribers connection cable. It is allowed to use up to 4 E1 modules in one DCN16U switchboard, one for each TDM flow.

Autoinformator module

It is designed for storage, recording and broadcasting voice messages to subscribers' units. Digitized voice messages and audible signals are stored in form of wave files at removable medium, in the capacity of which MMC/SD memory cards (from 15 to 512 MB) are used. Digital subscribers' units or personal computer with MMC/SD card reader can be used for message recording. Message playback can be performed in automatic mode, as well as by pressing button at subscriber's unit.

Autoinformator module is designed as board mounted on bushing fixed to bottom of DCN16U switchboard casing. Module front panel is located at the place of blank cover, placed at the right side of switchboard front panel. For connection of autoinformator module one of switchboard TDM flow is used. Connection cable coming from RJ-45 socket of autoinformator module at the front panel is included into it. Power is supplied to autoinformator module from baseboard of DCN16U switchboard.

Subscriber connection cable

Universal module of subscriber fuses 8X1A

It is intended for supply of fuse protected power to 8 subscriber units. Module is equipped with 8 monochromatic fuse status LED indicators. In case of fuse blowing the LED is lighted and failure message is sent to external contacts of failure indication.

Terminal devices of DCN switchboard

Digital subscriber devices for simplex loud-speaking connection or loud announcement can be connected to DCN system. ISDN Uo (Uk) interface of subscriber units connection During sound data transfer both B-channels of subscriber ISDN-interface are used, that allows to extend sound transmission frequency band between simplex loud-speaking devices up to 6.8 kHz.

In the general case subscriber unit has a digital port and set of bidirectional lines, which can be used either as target \functional keys, or as actuating relays. Type and executed functions are assigned for each line during system programming.

Loud announcement amplifiers, load switching relays, lines of external translation and alarm systems, and other analogue devices are connected via universal analogue subsystems module, which is included into subscriber U-interface of the system and performs signal converter function.

Speaking recording device (registrar) is also connected via analogue subsystem modules and ensures recording of selected devices voice traffic. System, including 4 DCN16U base units, cannot have more than 4 recording channels.

Subscriber power supply is performed via the circuit of U-interface phantom feeding or via separate cables. In case of phantom feeding subscriber fuses, mounted in DCN16U switchboard casing, are used. Additional supply lines for subscriber units, amplifiers, signaling device, etc. are connected via 8X1A universal modules of subscriber fuses, mounted at DIN-strip in hardware cabinet together with power source 48 V.