CN2184294Y - Main machine of wired multi-calling conversation instrument - Google Patents

Abstract

The utility model belongs to the communication device of wire telephone. A host is connected with multiple extension telephones. The host is composed of a gate circuit, the keys of the extension telephones, a main control system, a program memory, and a display system. 8031 is respectively connected with the gate circuit, the program memory, the display system, and the keys of the host. The gate circuit is connected with the keys of the extension telephones. The utility model adopts the technology of SCM, the control of the keys, and digital display. The utility model has the advantages of convenient use, no need for workers for toggling a switch, accuracy, and quick speed.

Description

Main machine of wired multi-calling conversation instrument

The utility model belongs to a kind of telephone communication apparatus.

At present, use commonplace a kind of wired multichannel intercom system, be to constitute by a main frame and Duo Tai extension set, two voice-grade channels are set between main frame and the extension set constitute full talk circuit, one of them is that main frame send speech passage frequently, another is that extension set send speech passage frequently, be provided with the sounder of call extension main frame and the audio signal generator that main frame is called out extension set in the main frame, be provided with main frame in the extension set and call out the sounder of extension set and the audio signal generator of call extension main frame, on described two voice-grade channels, two-way double-pole linkage switch and hilted broadsword two-way reversing switch are set, call out the function of extension set and call extension main frame in order to realize main frame, the call extension main frame adopts light-emitting diode indication extension, though this equipment is simple in structure, cheap, but employing Manual Transfer Switch, operation inconvenience, response speed is slow, and easy people is for causing misoperation.

It is a kind of by Single-chip Controlling, talkback unit simple to operate that goal of the invention of the present utility model is to provide.

The utility model is realized by following scheme: main frame is made up of gating circuit, extension set button, master control system, program storage and display system, 8031 are connected with gating circuit, program storage, display system and main frame button respectively, and gating circuit links to each other with the extension set button.

The utility model is used singlechip technology and is adopted by key control, the digital demonstration, and easy to use, need not staff's toggle switch during connection, accurately rapidly.

Accompanying drawing 1 is the control circuit block diagram

Accompanying drawing 2 is control circuit figure

Accompanying drawing 3 is a calling talkback device schematic diagram

Below in conjunction with accompanying drawing the utility model is done and to be described in further detail:

As shown in Figure 1, 2, 3, gating circuit is by 4 * CC4067(U ₁～U ₄) and 74LS138(U ₅) composition, wherein 74LS138(U ₅) output pin Y ₀～Y ₃With CC4067(U ₁～U ₄) INH be connected 4 * CC4067(U ₁～U ₄) A～O respectively with 8031(U ₁₀) P _1.2～1.5Link to each other 8031(U ₁₀) P _1.0～1.1Respectively with 74LS138(U ₅) A, B pin link to each other; The extension set button is by extension set 74LS125(U ₆), 74LS244(U ₇), 74LS138(U ₈) and 8279(U ₉) form, wherein extension set is pressed keyed jointing 74LS125(U ₆) control pin, 74LS125(U ₆) output and 74LS244(U ₇) input link to each other the input of 74LS125 and 8279(U ₉) RL _0～7End links to each other, 74LS244(U ₇) output and the 8279(U of sheet ₉) input link to each other 8279(U ₉) DB _0～7Pin and 8031(U ₁₀) P ₀Mouth is connected; Display system is by 8279(U ₁₅), 74LS138(U ₁₆), 2 * 7407(U ₁₈) main frame button and charactron composition, 8031(U ₁₀) P ₀Mouth and 8279(U ₁₅) DB _0～7Link to each other 8279(U ₁₅) SL _0～2Respectively with 74LS138(U ₁₄) A, B pin link to each other 8279(U ₁₅) B ₀～A ₁Pin and 7407(U ₁₈) 1～6A pin link to each other A ₂, A ₃Pin respectively with 7407(U ₁₇) 5～6A pin link to each other 7407(U ₁₇) and 7407(U ₁₈) output termination charactron bit line and the section line, main frame button and 8279(U ₁₅) RL _0～3Pin links to each other, 74LS138(U ₁₄) output Y _0～2, respectively with 2764,8279(U ₁₅), 8279(U ₁₅) link to each other.

When the talkback unit main frame was called out extension set, the host service function personnel pressed extension, the 8279(U of display system ₁₅) receive data, through 8031(U ₁₀) read 8031(U ₁₀) table look-up through program, extension number is imported display system, show by charactron, simultaneously with the extension set holding wire of correspondence through the gating circuit gating, the buzzer of extension set rings behind the gating, main frame and extension set just can be talked with.

When the call extension main frame, extension set clicks button, and control end becomes its incoming line of low level and communicates 8279(U with output line ₉) receive one digit number according to after, through 8031(U ₁₀) read 8031(U ₁₀) table look-up through program, and send charactron to show the extension number of correspondence, simultaneously, through the gating circuit gating, this moment, extension set just can be conversed with main frame with signal lines.

Claims (2)

1, a kind of wired multiway calling talkback unit main frame, it is characterized in that main frame is made up of gating circuit, control system, master control system, program storage and display system, 8031 are connected with gating circuit, program storage, display system and extension set button respectively, and gating circuit links to each other with the extension set button.

2, wired multiway calling talkback unit main frame as claimed in claim 1 is characterized in that gating circuit is by 4 * CC4067(U ₁～U ₄) and 74LS138(U ₅) composition, wherein 74LS138(U ₅) output pin Y ₀～Y ₃With CC4067(U ₁～U ₄) INH be connected 4 * CC4067(U ₁～U ₄) A～O respectively with 8031(U ₁₀) P _1.2～1.5Link to each other 8031(U ₁₀) P _1.0～1.1Respectively with 74LS138(U ₅) A, B pin link to each other; The extension set button is by extension set 74LS125(U ₆), 74LS244(U ₇), 74LS138(U ₈) and 8279(U ₉) form, wherein extension set is pressed keyed jointing 74LS125(U ₆) control pin, 74LS125(U ₆) output and 74LS244(U ₇) input link to each other the input of 74LS125 and 8279(U ₉) RL _0～7End links to each other, 74LS244(U ₇) output and the 8279(U of sheet ₉) input link to each other 8279(U ₉) DB _0～7Pin and 8031(U ₁₀) P ₀Mouth is connected; Display system is by 8279(U ₁₅), 74LS138(U ₁₆), 2 * 7407(U ₁₈) main frame button and charactron composition, 8031(U ₁₀) P ₀Mouth and 8279(U ₁₅) DB _0～7Link to each other 8279(U ₁₅) SL _0～2Respectively with 74LS138(U ₁₄) A, B pin link to each other 8279(U ₁₅) B ₀～A ₁Pin and 7407(U ₁₈) 1～6A pin link to each other A ₂, A ₃Pin respectively with 7407(U ₁₇) 5～6A pin link to each other 7407(U ₁₇) and 7407(U ₁₈) output termination charactron bit line and the section line, main frame button and 8279(U ₁₅) RL _0～3Pin links to each other, 74LS138(U ₁₄) output Y _0～2, respectively with 2764,8279(U ₁₅), 8279(U ₁₅) link to each other.

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