Check the listing for details. DRAKE Easi-com 1300 11. Condition: Used. Listed at 300.00 USD. System Overview The 4000 Digital Series is a Digital Communications System using a central switching matrix for routing calls between outstations connected in a star format. The digital central switching matrix uses a microprocessor for control and configuration purposes. A Digital Matrix Card, allowing multiple routes to be made simultaneously achieves all switching and routing. Analogue audio, GPI inputs and outputs, data interfaces and an advanced software package are also provided as part the 4000 system. A range of Digital Control Panels are available providing a suitable user interface for making and receiving calls over the system. These panels contain push buttons configured to operate specific routes or activate control functions. The push button actions are sent as digital data using a serial link to the central matrix for interpretation by the microprocessor and information is returned to the control panel by the same method. Audio is sent and received digitally, multiplexed with the data via a single co-axial cable. Audio and data can also be connected via standard twisted pair wiring or CAT5. The standard control panels provide the basic facilities of Direct Access Keys (DAKs) which allow singlebutton operation for frequent calls, a Reply key for responding to unscheduled calls and where applicable, a dial display for making infrequent calls. A call is initiated on a control panel by pressing one of the assigned DAKs or, on panels equipped with an electronic dial-pad, by dialling a number and pressing the call button. This activates crosspoints, located in the Matrix, which make the audio route (or routes) to the desired destination(s). Routing can be one-way (e.g. talk only) or two-way (talk and listen simultaneously) and several callers can speak to the same destination at the same time due to the mixing capability of the matrix. The crosspoints in the matrix are activated or de-activated according to configuration rules held in the system's Matrix map (stored in the microprocessor's memory). The system map for the 4000 Digital Series residing on a Personal Computer is downloaded into the Matrix from the 'Configuration and Master Assignment Programming System integrated' (CMAPSi) and controls every aspect of 4000 Digital Series operation. The Matrix sends part of the system map out to each control panel, programming the actions available on each DAK of each panel. This includes any special function that may also be assigned to a particular pushbutton in addition to initiating the normal dual routing. Each DAK may be centrally configured and assigned to a destination, source or both at system set-up. On some panels, DAKs that are not assigned at system set-up can be assigned, by local programming of the pushbuttons in Soft mode, to allow different routing options. Local assignments may not be retained if the system is reset, although they are held in non-volatile memory at the panel and thus will be retained after power down. Destinations and sources can be other panels, beltpacks, 2-wire or 4-wire circuits, either individually or in groups. The destinations and sources could also be in another talkback system. Connection to other Technical Manual Issue 2.1 4000 Digital Series II Page 2 STA0381 4000 Digital Series systems can also be achieved by use of Ethernet, providing an integrated private intercom network. Up to eight 4000 Digital Series systems can be connected using this facility. A Conference facility is also available, configured via CMAPSi, which allows people to converse in a conference mode. This is similar in operation to the Conference Ring (Party Line) facilities available in older conventional systems. Users can be allowed access to any conference (up to 64 conferences are allowed) either to listen only or to talk and listen