JPH04104599A - Key telephone system - Google Patents

Abstract

PURPOSE:To eliminate trouble exchanging a ROM storing a program for key telephone system control for terminal interface for each terminal interface circuit when there is an error or the like of the program by storing the key telephone system control program for terminal interface circuit in a main storage part. CONSTITUTION:A main device 13 is incorporated with a switch circuit network 3 connecting between a trunk line 1 and an extension 11 and a main control part 4, a main memory circuit 5 and a main memory circuit 6 in which the key telephone system control program is stored are connected to the main control part 4, and a terminal interface circuit 7 is equipped with a RAM 10 which can delete the writing in which the key telephone system control program is stored and a connection part 8 connecting the key telephone system 12 to a switch circuit network 3 by the control of a CPU 9. Thus, the program for key telephone control can be supplied to the terminal interface circuit without exchanging the ROM of each terminal interface circuit even when there is an error or the like of the program.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a button telephone device, and more particularly to a button telephone device having a memory for storing a button telephone control program in a terminal interface circuit.

[Conventional technology]

Conventionally, this type of button telephone device has been configured such that a button telephone control program for the terminal interface is stored in advance in a ROM in the terminal interface circuit.

[Problem to be solved by the invention]

In the conventional button telephone device described above, the terminal interface button telephone control program is stored in the ROM in the terminal interface circuit in advance, so if a new button telephone is added, a new function is added, or there is an error in the program. However, there is a drawback that the ROM storing the button telephone control program for the terminal interface must be replaced for every terminal interface circuit.

"Means for Solving the Problems" The button telephone device of the present invention includes a main device accommodating a plurality of office lines and a plurality of button telephones, and includes a main storage section in the main device; a terminal interface circuit for accommodating the button telephone; the main memory stores a button telephone control program for the terminal interface circuit; the terminal interface circuit includes a writable and erasable memory; It has a control means for receiving a key telephone control program from the main storage section and storing it in the writable and erasable storage section.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention.

In FIG. 1, the key telephone device of this embodiment is a main device 13 that accommodates a plurality of office lines 1 and a plurality of key telephones 12.
The plurality of office lines 1 are connected to the main device 1 via the office line accommodation circuit 2.
The key telephone 12 is connected to the extension 11 and connected to the main device 1 via the terminal interface circuit 7.
It is housed in 3.

The main device 13 includes a switch circuit network 3 that connects the central office line 1 and the extension line 11, and a main control unit 4. The main control unit 4 includes a main memory circuit 5 and a main memory in which a key telephone control program is stored. A circuit 6 is connected.

The terminal interface circuit 7 includes a terminal interface control processor (hereinafter referred to as CPU) 9, a writable and erasable RAM 10 for storing a button telephone control program, and a terminal interface circuit 7 that controls the button telephone 1 under the control of the CPU 9.
2 to the switch circuit network 3 (hereinafter referred to as CN) 8.

Next, the transfer operation of the button telephone control program of this embodiment will be explained.

The main control section 4 receives a predetermined button telephone control program transfer signal from the button telephone 12 via the terminal interface circuit 7, and transfers the signal to the terminal interface circuit 7 via the switch circuit network 3 to the main memory circuit 6. Transfer the stored button phone control program. Terminal interface circuit 7
Then, the key telephone control program transferred by the CPU 9 is stored in the RAM 10. From then on, RAMl0
The CPU 9 operates according to the button telephone control program stored in the key telephone control program.

〔Effect of the invention〕

As explained above, the present invention includes a main memory section and a terminal interface circuit for accommodating a button telephone in the main device, stores a button telephone control program for the terminal interface circuit in the main memory, and stores a button telephone control program for the terminal interface circuit. The circuit includes a writable and erasable storage section, and has control means for receiving a button telephone control program from the main memory and storing it in the writable and erasable storage section, so that the button telephone set is stored in the RAM of the terminal interface circuit. Since the main control unit can supply the control program from the main storage unit, if a newly added button telephone, a new function is added, or there is an error in the program, the main controller can supply the control program from the main memory. This has the advantage that the program can be supplied from the main memory to the terminal interface circuits without replacing the ROM of each terminal interface circuit that stores the program.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. l... Office line, 2... Office line accommodation circuit, 3... Switch circuit network, 4... Main control section, 5... Main memory circuit, 6... Main memory circuit, 7... ...Terminal interface circuit, 8...Connection part (CN), 9.
・Terminal interface control processor (CPU
), 10... RAM, 11... Extension, 12... Key telephone, 13... Main device.

Claims (1)

[Claims] A key telephone device comprising a main device accommodating a plurality of office lines and a plurality of key telephones, the main device comprising a main storage section and a terminal interface circuit accommodating the button telephones; stores a button telephone control program for the terminal interface circuit, the terminal interface circuit includes a writable and erasable storage section, and the button telephone control program is received from the main storage section and is writable and erasable. 1. A button telephone device comprising a control means stored in a storage section.