In computing, a system call is the programmatic way in which a computer program requests a service from the kernel of the operating system it is executed on. This may include hardware-related services (for example, accessing a hard disk drive), creation and execution of new processes, and communication with integral kernel services such as process scheduling. System calls provide an essential interface between a process and the operating system.
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HappyCall HC-400RT Signal Amplifier
Wireless device receiver.135,00$ -
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HappyCall Receiver HC-304R
The receiving device of the wireless call system.
335,00$HappyCall Receiver HC-304R
335,00$ -
HappyCall HC-303R
The receiving device of the wireless call system.
349,00$HappyCall HC-303R
349,00$ -
Receiver / Display HappyCall HC-2300R
The receiving device of the wireless call system.
0,00$ -
HappyCall HC-213R Receiver / Display
The receiving device of the wireless call system.
335,00$ -
Receiver / Display HappyCall HC-212R
Wireless device receiver.
299,00$ -
HappyCall Receiver HC-208R
The receiving device of the wireless call system.162,00$HappyCall Receiver HC-208R
162,00$ -
Remote Call HC-203R Happy Call
The remote control simultaneously displays 3 calls, 8 remains in memory. Designed for registration and maintenance of a large number of tables. Up to 400 numbers can be registered on the console.
279,17$Remote Call HC-203R Happy Call
279,17$ -
HappyCall HC-202R Receiver / Display
The receiving device of the wireless call system.
204,17$ -
Receiver / Display HappyCall HC-201R
Wireless device receiver.
265,00$ -
Call Button Happy Call HC-1800T
Wireless button. It has an original design and three colors. On the reverse side of the button is Velcro for fixing.22,00$