Nurse Call System - Enterprise

Models of Nurse Call System:

Working of NCS-Enterprise

       Ordinarily a patient can initiate a call either by pressing a feather touch key on the calling unit or by pressing bed side switch. This action will make all three indicators viz.: the indicator on the calling unit, the door indicator (Red) and the window allocated for this calling unit on the Patient Care Display Unit at the Nurse Station flash. Incidentally the voice “Attention Patient Calling” keeps repeating itself. It is possible to make this voice Intermittent also.
   On pressing “Mute” button on the Patient Care Display Unit at the Nurse Station or on pressing “Care” button on the Patient Care Unit at the patient room, the voice gets muted and all the three indicators that where flashing earlier will become steady to indicate recognition of the call. Pressing “Care” button either directly or subsequent to the pressing of the “Mute” button at the Nurse Station will make the dot matrix display at the Nurse Station show the presence of the nurse at the room (NURSE@ROOM......) and Door Indicator turn Green to show the patient is being taken care.
    Apart from this ordinary call there are two other important calls viz: toilet call, emergency call that can be initiated from a patient’s room. Once toilet call is initiated through the toilet calling unit, the same sequence of events is followed as that of an ordinary call with an exception that the dot matrix display on the Patient Care Display Unit at the Nurse Station will show “TLTCL@ROOM......” and the alternate voice “Attention Urgent Message” is triggered. It also has to be noted that the Door Indicator will be flashed faster with a different color.

Enhanced Features

  • Call forwarding during lean hours when limited staff is available.
  • Call Escalation if pending more than pre-configured duration.
  • Nurse presence indication included in the Dual Colored Door Indicator to show "patient under care" status.
  • Provision for Emergency call with protection against inadvertent initiation and with differentiation between nurse and patient initiated emergency.
  • Nurse Station Display includes Single line text display to show various messages viz:Nurse presence in a room, call forwarded from another Nurse station, Emergency alarm etc.
  • All Nurse stations can be networked through supervisory controller to handle call forwarding, call escalation reporting through common large size LED display.
  • Allows for multiple Nurse station Displays which could be for expansion or for duplication of information in the corridor etc.
  • Calling units can share one window in the display module or can have individual windows.
  • Provision for indicating Code Blue Alerts.
  • Configurable System to suit variety of hospital requirements.
  • Optional Equipment Alarm interface module allows for conveying Medical Equipment Alarms to Nurse Station automatically.


NCS Specifications:



Enterprise display               This is a Microcontroller based device placed in the nurse station with static windows which displays the room number of the calling patient and also it has a voice module to announce the call. There are three buttons on it,

Power Button: Pressing this for long time(approximately 3 sec) turns the device ON or OFF.

MUTE Button: It is for acknowledging a call from patient. It will make the flashing window steady and also silence the voice module until a call is cleared.

Test Button: On pressing the button it will flash all the windows and will announce ” Attention, Patient calling ” to make sure that all the components are working fine.

Room Unit

Room Unit             Gets powered by Nurse station controller, consumes less than 5 watts. Allows for 4 calling units, one Toilet calling unit and one patient care unit. Uses 4 pair of wires to get inter connected with nurse station controller. Uses solder-less connection to integrate all the calling units for ease of installation. Uses 4 wires for calling unit and 6 wires for patient care unit, 3 wires for toilet unit and 3 wires for Door indicator.

Electronic Calling Unit

Calling Unit
            The unit is designed with soft touch key pad consisting of one key for call initiation and another for clearing call which is required to be done by the nurse attending to the patient.
            Additional push button switch is integrated to this unit by means of a coil cord to enable a patient to initiate a call from the bed itself.

Patient Care Unit

            Uses three feather touch keys one for care, one for emergency call and the other for clear. Uses one Green LED indicating nurse presence and other Red LED to indicate that the alarm is active.

Toilet Calling Unit

Toilet Unit

            Here call is originated by pulling the cord and can be cleared by pulling it again. The LED indicator lights up if call is active. This allows the patient to initiate a call from squatting positions itself.

Door Indicator

Door indicator             These semi circular shaped indicators can be mounted on the wall near the patient's door so that , nurse walking through the corridor can see it from a distance.These are made of super bright LEDs to indicate patient's call pending which can be seen from the corridor itself.

Nurse Station Controller (NSC)

Controller             Designed around a high speed RISC based microcontroller to interface with 16 room units and four nurse station(NS) display modules. It collects information from all the enabled room units, sends indicator information to all the calls and accordingly instructs Nurse station(NS) display modules. It also sends status to the Supervisor controller about all the activities.

Supervisory Controller (SC)

Supervisory Controller             Designed making use of a high speed RISC based micro controller to get connected to 16 nurse station controllers and to a PC. It interrogates all the nurse Controllers to get information related to all the activities of different room units and process them to arrive at Call forwarding, Call escalation, Emergency Call information which are forwarded to a PC, to a common large size display unit and to the Nurse station displays through Nurse station controller. It also reports to the PC about all the other activities.

Supervisory LED Display

Supervisory Display             This Display system is again designed around a microcontroller to get connected to the supervisory controller to receive any information to be shown and to put such information on the LED matrix. The display size is designed to be able to read it from a distance of 100 feet easily. The supervisory controller uses this display to show call escalated, call forwarded, emergency calls etc.

Models of Nurse Call System:

Display Windows
  • LCD display                   : 320x240 pixels
  • Dimension                     : 135W mm X 110H mm
  • Symbol Size                  : 64x64 pixels on NS Display.

Indicators         : flashing 5 mm LED to indicate NCS is active.
Power                : 230 V AC +/-10%,50Hz, 15 watts

Front Panel Keys
  • ”MUTE” for silencing the voice
  • ”TEST” for testing all the windows and the voice module
  • ”PWR” to turn ON/OFF the equipment

Controller Specifications
  • Allows for 16 Room units and 4 Nurse Station Display modules.
  • One composite port to interact with supervisory controller.
  • Works on 230 VAC I/P and consumes a power of 100 watts.

Supervisory Controller Display Specifications
  • Display Type           : Red LED [ Light Emitting Diode].
  • Display Size            : Character height 2.3”
  • No. of pixels            : 144 x 16.
  • Power                      : 230 VAC I/P, 25 watts.

Cable Specifications
  • Standard                             : Belden #8795 equivalent
  • Thickness                           : 22AWG twisted pair Characteristic
  • Impedance (Zo)                 : 100 E
  • Distributed Capacitance : 15 pF/ft
  • Propagation Delay            : 1.3 nsec/ft
  • Conductor Resistance    : 0.027 Ohms/ft (90 Ohms/Km approx.)

Environmental Specifications:
  • Operating Temperature  : 0 to 50* C
  • Humidity                              : 95% at 40*C
  • Storage Temperature      : 0 to 70* C
  • Altitude                                : 10,000 ft

  • NS-display                          : 255W X 205H X 110D 2Kg (approx.)
  • Calling Unit                         : 93.5W x 90H mm 100 gm (approx.)
  • Door Indicator                   : 70W x 70H mm 150 gm (approx.)