JP2791211B2 - Private branch exchange - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange that connects an analog line and a digital line.

[Conventional technology]

Conventionally, this type of private branch exchange has conventionally been connected to the terminal connected to the analog interface of the extension when receiving a call from the analog telephone line, and to the digital interface of the extension when receiving a call from the digital telephone line. Was configured to receive an incoming call.

The conventional G4 facsimile machine also has a G3 function.
There was a G3 / G4 facsimile machine.

[Problems to be solved by the invention]

However, if the G3 / G4 facsimile device is connected to a digital interface, it cannot be connected to an analog line, and the G3 function of the G3 / G4 facsimile device cannot be used.

Further, in order to connect to an analog line, it is necessary to connect a G3 facsimile apparatus via an analog interface, which has a disadvantage that an uneconomical system configuration is forced.

[Means for solving the problem]

The present invention provides an analog line interface unit for connecting an analog line, a digital line interface unit for connecting a digital line, a procedure for performing predetermined communication via the analog line, and the digital line. Digital terminal interface means for connecting a terminal corresponding to a procedure for performing predetermined communication via the analog line, and an incoming call from the analog line, and an incoming call from the digital line, By providing notifying means for notifying an incoming call via a terminal interface, and connecting means for connecting the incoming analog line or digital line and the terminal via the digital terminal interface means, the function of G3 is provided. And analog lines such as facsimile machines with G4 functions Using a terminal corresponding to the procedure for performing predetermined communication and the procedure for performing predetermined communication via a digital line both for incoming calls from analog lines and for incoming calls from digital lines. However, by using digital terminal interface means for connecting the terminals, the connection can be realized with a simple connection.

〔Example〕

FIG. 1 is a block diagram showing the system configuration of the present invention. In FIG. 1, reference numeral 100 denotes a main unit which is a private branch exchange,
02 is an analog telephone network, 104 is a digital public network ISDN
A network (combined service, digital network) 105 is an analog line interface, which is connected to an analog telephone network 102 via a line 101. Incidentally, the exchange method in the present embodiment employs a time division method. Therefore, the analog line interface 105 has an upstream PCM highway 106,
It is connected to the exchange unit 112 via the CM highway 107.
Reference numeral 108 denotes an ISDN T-point interface, which is connected to the ISDN network 104 via the line 103.

ISDN T-point interface 108 is upstream PCM highway 10
9. Connected to the exchange unit 112 via the downstream PCM highway 110.

113 is an ISDN S point interface, and the extension is ISDN
G3 / G4FAX1 via line 129 with function to accommodate terminal
Accommodates 30. ISDN S point interface 113 is downlink PCM
Exchange section 1 via highway 114, up PCM highway 115
Connected to 12. Reference numeral 116 denotes a similar ISDN S point interface. In this embodiment, an ISDN telephone 132 is accommodated via a line 131. In addition, it is connected to the exchange unit 112 via PCM highways 117 and 118.

Reference numeral 119 denotes a dedicated telephone interface, which accommodates an extension telephone 134 dedicated to the present system in the extension via a line 133 and is connected to the exchange unit 112 via PCM highways 120 and 121. The extension telephones 134 include those having a function of connecting the SLT.

A general telephone interface 122 accommodates a G3FAX 136 via a line 135 and is connected to the exchange unit 112 via PCM highways 123 and 124. Reference numeral 127 denotes a ringer generator which generates a call signal of 16 Hz 75 V _rms . Reference numeral 111 denotes a tone generating unit which is connected to the switching unit 112 via the PCM highway 128 and generates various service tones for the extension terminals.

126 is a main control unit that controls the entire system,
Each interface and exchange unit 112 via the control bus 125
Is connected to 126M is a memory in which information necessary for the main control unit 126 to control the entire system is stored. The information stored in the memory 126M includes information indicating which extension terminal is connected to which extension position, and the like.

FIG. 2 shows an analog line interface 10 according to this embodiment.
FIG. 5 is a block diagram of FIG. 5, where 101a and 101b are lines from the analog telephone network 102. An incoming call detection unit 200 detects an incoming call from the analog telephone network, and a detection signal is sent to the control unit 211 via a signal line 209. 201 is a relay for forming a DC loop in response to an incoming call, and is driven by the control unit 211 via a signal line 212. 202 is a DC loop circuit for the above-mentioned response, and 203 is a capacitor for cutting DC current.

Reference numeral 204 denotes a hybrid transformer, which is a two-line AC signal 4
Perform line transformation. A receiving amplifier 205 converts the level of an AC signal from the hybrid transformer 204 and inputs the converted signal to the codec 208. A transmission amplifier 207 exchanges the level of an AC signal from the codec 208 and inputs the signal to the hybrid transformer 204. Reference numeral 206 denotes a balancing network, which is a matching circuit for preventing an AC signal from flowing from the transmission amplifier to the reception amplifier. Codec 20
Reference numeral 8 denotes a circuit for converting each signal from an analog signal to a PCM (pulse code modulation) signal and a PCM signal to an analog signal.
It is connected to the exchange unit 112 via the downstream PCM highway 107 and the upstream PCM highway 106.

FIG. 3 is a block diagram of the ISDN T-point interface according to this embodiment, in which 103a, 103b, 103c, and 103d are shown.
302, a line from the ISDN network, is a layer 1 and a layer 2
And connected to the line via the transformers 300 and 301.

Reference numeral 303 denotes a distribution unit that separates and distributes the B1 channel and the B2 channel from the downstream PCM highway 109. The separated and distributed B1 channel signal is connected to a layer 1 and layer 2 processing unit 302 via a signal line 304, and the B2 channel signal is connected to a layer 1 and layer 2 processing unit 302 via a signal line 305.

A multiplexing unit 306 multiplexes the separated B1 channel and B2 channel. Layer 1 and layer 2 processing section 302
The B1 channel signal is input to a multiplexing unit 306 via a signal line 307, and the B2 channel signal is input to a multiplexing unit 306 via a signal line 308 and multiplexed, and sent out to the upstream PCM highway 110. Reference numeral 310 denotes a timing generation unit which supplies a timing signal to the distribution unit 303 and the multiplexing unit 306 via a signal line 309.

A control unit 312 controls the ISDN T-point interface, and is connected to the layer 1, the layer 2 processing unit 302, and the storage unit 313 via a control line 311. Also control bus
It is connected to the main control unit 126 via 125.

FIG. 4 is a block diagram of the ISDN S-point interface according to this embodiment, in which 129a, 129b, 129c, and 129d are shown.
This is the line connected to G3 / G4FAX130. Reference numeral 408 denotes a layer 1 and layer 2 processing unit, which is connected to the line via transformers 409 and 410.

Reference numeral 400 denotes a distribution unit that separates and distributes the B1 channel and the B2 channel from the downstream PCM highway 114. The separated and distributed B1 channel signal is connected to a layer 1 and layer 2 processing unit 408 via a signal line 401, and the B2 channel signal is connected to a layer 1 and layer 2 processing unit 408 via a signal line 402. 403 is separated B1
A multiplexing unit that multiplexes the channel and the B2 channel. The layer 1 and layer 2 processing units 408 connect the B1 channel signal to the multiplexing unit 403 via the signal line 404 and the B2 channel signal to the multiplexing unit 403 via the signal line 405. Multiplexed, and transmitted to the upstream PCM highway 115. A timing generator 407 supplies a timing signal to the distribution unit 400 and the multiplexing unit 403 via the signal line 406.

A control unit 413 controls an ISDN S-point interface, and controls a layer 1 and a layer 2 processing unit 4 via a control line 412.
08 and the storage unit 414. Control bus 125
Is connected to the main control unit.

 Reference numeral 411 denotes a power supply circuit for the ISDN terminal.

The description will be given according to the execution flow of the main control unit 126 shown in FIG.

If an incoming call is detected in step S500, the main control unit 126 determines the station line type in step S501, and proceeds to step S502 if PSTN or to step S513 if ISDN.

Here, the incoming call from the PSTN 102 is recognized by the incoming call detecting unit 200 in FIG. 2, and the detection signal is sent to the control unit via the signal line 209. Subsequently, a detection signal is transmitted to the main control unit 126 via the control bus 125, and the process is started assuming that there is an incoming call.

On the other hand, the incoming call from the ISDN 104 is received by the receiving lines 103c and 103 in FIG.
The signal is transmitted from the layer 1 and layer 2 processing unit 302 to the control unit 312 via the signal line 311. The D-channel information indicating the incoming call is sent to the main control unit 126 by the control bus 125.
And the incoming call is recognized and the process is started.

From step S502, the main control unit 126 refers to the memory 126M to search for an extension with a designated ringing, and when there is a designation, calls the extension. However, as another embodiment, the DIL (direct A process of ringing only one extension, such as a line, can be performed with the same configuration.

In step S502, first, it is determined whether or not the calling process for an extension for which ringing is specified has been completed. If not, the process proceeds to step S503 to search for an extension for which a sound is designated, and the process branches in step S504 according to the type of extension.

If it is registered in the memory 126M that the type of the designated ringing extension is the S point telephone, the main control unit 126 refers to the memory 126M in step S505, and the extension is faxed (fax machine).
It is determined whether or not it is a facsimile, and if not, the process proceeds to step S506, and if not, the process proceeds to step S507 for sound processing.

In step S506, the main control unit 126 refers to the memory 126M to determine whether the G4 FAX has the G3 function. If so, proceed to step S507; otherwise, skip the ringing process and search for the next ringing designated extension.
Return to S502.

The main control unit 126 issues a call setting request to the terminal connected to the point S via the ISDN S point interface in step S507, and waits for a call setting acceptance display from the terminal. If it is determined in step S508 that the call setting acceptance display has been transmitted, a call notification is provided in step S509. Step S509
If the call notification is recognized, the process returns to step S502.

If the ringing designated extension type has been registered in the dedicated telephone and the memory 126M in step S504, the main control unit 126 shifts the processing to step S510. In step S510, a ringing tone is selected from the tone generation unit 111 in FIG. Step S
511 turns on the speaker of the dedicated telephone and proceeds to step S512.
If you have an incoming call display, such as an LCD (liquid crystal) display, it will indicate so,
(Light-emitting diode), etc., are blinked.

Ringing designation extension is SLT (2-wire telephone) in step S504
Alternatively, if it is a G3FAX, start the ringer 127 shown in FIG.
(Call) signal to the terminal to end the calling process,
It returns to step S502.

In step S502, it is determined whether or not all extensions to be ringed have been searched. If the extension has ended, the state transits to a calling state and waits for a response from the extension. If you have not searched all,
The process is repeated from S503.

And the main control unit 126 is an extension, for example, G3 / G4FAX130
When the response is detected via the ISDNS point interface 113, the switching unit 112 is controlled to connect the received external line to the responded extension.

Conversely, when there is a request for G3 transmission from the G3 / G4 FAX 130 via the PSTN 102, the main control unit 126 recognizes the request via the ISDN S point interface 113, and the G3 / G4
The analog line interface 105 is controlled according to the dial information from the FAX 130 to make a call. And the main control unit 1
26 controls the switching unit 112 to connect the G3 / G4 FAX 130 to the external line that the PSTN 102 has called.

On the other hand, the main control unit 126 controls the ISDN T-point interface 108.
If an incoming call is detected, the transmission capability information element in the call setting information is extracted in step S515, and in step S516, the process branches by referring to the information transfer capability included in the information.

The case where the information transfer capability is speech will be described with reference to the flow of FIG.

In step S600, the main control unit 126 first checks whether the calling process for the designated ringing extension has been completed. If the process has not been completed, a ringing designated extension registered in the memory 126M is searched in step S601, and the type of the extension registered in the memory 126M is determined in step S602 to branch.

When the main control unit 126 determines that the extension is an S point telephone by referring to the memory 126M, the main control unit 126 further executes a step.
In step S603, the memory 126M is referred to, and it is determined whether the fax is a fax. If it is a fax, the process returns to step S600 without performing the calling process. On the other hand, if it is not a facsimile, in step S604, a call setting request is sent to the S point telephone, and a call setting acceptance display is waited. When the main control unit 126 recognizes the call setting acceptance display from the terminal in step S605, in step S606 the ISDN T point interface 108
Then, the call setting acceptance display is transmitted to the T point, that is, to the called outside line. If the call notification is recognized from the S point telephone at step S607, a call request display to the outside line is performed at step S608. Here, the processing of steps S606 and S608 will be omitted if it has already been performed once in another processing for the extension.

If the ringing designated extension is a dedicated telephone at step S602, a call setting acceptance display is transmitted to point T, that is, an outside line at step S609, and a call request display is transmitted at step S610.
The processes in steps S609 and S610 are omitted if they have been executed at least once in another route.

In step S611, a ringing tone is selected from the tone generating unit 111 shown in FIG.
Connect through. In step S612, the speaker of the dedicated telephone is turned on, and in step S613, an incoming call display is performed as in step S512.

If the ringing designation extension is SLT or G3FAX in step S602, call setting acceptance display and call request display are performed at point T, that is, an outside line in steps S614 and S615. The processes in steps S614 and S615 are omitted if they have been executed at least once in another route. In step S616, the ringer shown in FIG.
Activate 127 to send an IR signal to the terminal and end the calling process.

If the information transfer capability is 3.1 KHz audio in step S516, the main control unit 126 executes the processing shown in FIG.

The main control unit 126 determines whether or not the calling process has been completed in step S700, and if not completed, the process proceeds to step S701.
Extracts a ringing designation extension registered in the memory 126M.

In step S702, the main control unit 126 refers to the memory 126M,
If the ringing designated extension extracted in step S701 is an S-point telephone, reference is made to the higher layer consistency information element received from the outside line in step S703, and if the higher layer characteristic identification is G3, the flow proceeds to step S704. If it is not G3 or if the information element has not been transmitted, the process moves to step S705.

In step S704, the main control unit 126 refers to the memory 126M and determines whether the S point telephone terminal extracted in step S702 has a G3 function with a G3 function. Step S705 for G3 / G4FAX
Go to step S700, otherwise return to step S700.

G4FAX without G3 function or ISD with only phone function
Incoming calls to terminals registered in 126M as N phones are prohibited. Therefore, it is possible to prevent a decrease in the incoming call efficiency due to an incoming call to a terminal that cannot perform the specified communication.

In step S705, a call setting request is sent to the S point telephone (G3 / G4FAX), and a call setting acceptance display is awaited. When the main control unit 126 recognizes the call setting reception display from the terminal in step S706, the main control unit 126 sends the call setting reception display to the T point, that is, the outside line being called by the ISDN T point interface 108 in step S707.
Subsequently, when a call notification is recognized from the S point telephone (G3 / G4FAX) in step S708, a call request display to an outside line is performed in step S709. Here, the processing of steps S707 and S709 will be omitted if it has already been performed once in another processing for the extension.

If the ringing designated extension is a dedicated telephone in step S702, the process proceeds to step S710. Steps S710 to S714 are steps S609
Same as S613.

If the ringing designation extension is SLT or G3FAX in step S702, the process proceeds to step S715. The processing of steps S715 to S717 is the same as that of steps S614 to S616.

If the information transfer capability is unrestricted digital at step S516, the main control unit 126 executes the processing shown in FIG.

The main controller 126 determines in step S800 whether or not the calling process has been completed, and if not, extracts the ringing designation extension registered in the memory 126M in step S801.

In step S802, the main control unit 126 refers to the memory 126M and, if the ringing designated extension extracted in step S801 is an S point telephone, refers to the higher layer consistency information element received from the outside line in step S803, and If the characteristic identification is G4, the process proceeds to step S804. If it is not G4, or if the information element has not been transmitted, the flow shifts to step S805.

In step S804, the main control unit 126 refers to the memory 126M and determines whether the S point telephone terminal extracted in step S801 is a G4FAX (G3FAX).
If it includes a G4FAX having a function, the process proceeds to S806. In step S805, if the S point telephone terminal is a terminal that can handle only voice, the process returns to step S800 without executing the calling process.

In step S806, a call setting request is sent to the S point telephone, and a call setting acceptance display is awaited. Upon recognizing the call setting acceptance display from the terminal in step S807, the main control unit 126 proceeds to step S808.
The ISDN T-point interface 108 transmits a call setting acceptance display to the T point, that is, to the incoming external line. Subsequently, when the call notification is recognized from the S point telephone in step S809, a call request display to an outside line is performed in step S810. Here, the processing of steps S809 and S810 will be omitted if it has already been performed once in another processing for the extension.

If the ringing designated extension is a dedicated telephone at step S802, S8
Proceed to 11. Steps S811 to S815 are the same as steps S609 to S613.

If the ringing designation extension is SLT or G3FAX in step S802, the process is omitted and the process returns to step S800.

Although the facsimile communication has been described in this embodiment,
It can be applied to computer communication. Ie G3
Although the facsimile and the G4 facsimile have been described, the invention can also be applied to analog computer communication and digital computer communication.

〔The invention's effect〕

As described above, according to the present invention, a procedure for performing a predetermined communication via an analog line such as a facsimile apparatus having a G3 function and a G4 function and a predetermined communication via a digital line It is simple to use the terminal corresponding to the above procedure for both incoming calls from analog lines and incoming calls from digital lines by using digital terminal interface means for connecting terminals. There is an effect that the connection can be realized.

Whether each of the plurality of terminals connected to the digital terminal interface means supports a procedure for performing predetermined communication via an analog line and a procedure for performing predetermined communication via a digital line Storage means for storing whether or not an incoming call from the analog line is detected, a procedure for performing predetermined communication via the analog line in the storage means, and a procedure for performing predetermined communication via the digital line. The terminal stored as corresponding to the procedure is provided with notification means for notifying an incoming call via the digital terminal interface, whereby the analog line among the plurality of terminals connected to the digital terminal interface means is provided. Answering an incoming call from a terminal by a terminal that can respond to the call is a digital terminal interface for connecting the terminal. By utilizing the Eighth means, in brief connection, there is an effect to be feasible.

[Brief description of the drawings]

1 is a block diagram of an apparatus embodying the present invention, FIG. 2 is a block diagram of an analog line interface of the apparatus embodying the present invention, and FIG. 3 is a block diagram of an ISDN T point interface of the apparatus embodying the present invention. FIG. 4 is a block diagram of the ISDN S-point interface of the device embodying the present invention, and FIGS. 5 to 8 are flowcharts of the present invention. 105 is an analog line interface, 113 is an ISDNS point interface, 126 is a main control unit, and 130 is a G3 / G4FAX.

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-1-292961 (JP, A) JP-A-4-79557 (JP, A) JP-A-3-280691 (JP, A) JP-A-4-294 114594 (JP, A) JP-A-2-145046 (JP, A) JP-A-3-109463 (JP, U) JP-A-2-21830 (JP, Y2) (58) Fields investigated (Int. Cl. ⁶ , DB name) H04M 3/00 H04M 3/16-3/20 H04M 3/38-3/40 H04M 3/42-3/58 H04M 7/00-7/16 H04M 11/00-11/10 H04Q 1/54-1/56 H04Q 3/42 H04Q 3/58-3/62 H04Q 3/70-3/74

Claims (3)

(57) [Claims] 1. An analog line interface means for connecting an analog line, a digital line interface means for connecting a digital line, a procedure for performing a predetermined communication via the analog line, and the digital line interface. Digital terminal interface means for connecting a terminal corresponding to a procedure for performing a predetermined communication via a line, when receiving from the analog line, and when receiving from the digital line, Notifying means for notifying an incoming call via a digital terminal interface; and connecting means for connecting the incoming analog line or digital line to the terminal via the digital terminal interface means. Private branch exchange. 2. An analog line interface means for connecting an analog line, a digital line interface means for connecting a digital line, a digital terminal interface means for connecting a plurality of terminals, and Connecting means for connecting a line or the digital line to the plurality of terminals via the analog line interface means or the digital line interface means and the digital terminal interface means; and connecting to the digital terminal interface means Storage means for storing whether each of the plurality of terminals corresponds to a procedure for performing predetermined communication via the analog line and a procedure for performing predetermined communication via the digital line. , Detects incoming calls from the analog line And a terminal stored in the storage means as corresponding to a procedure for performing predetermined communication via the analog line and a procedure for performing predetermined communication via the digital line. A private branch exchange device comprising: a notifying unit that notifies an incoming call via an interface. 3. An analog line interface means for connecting an analog line, a digital line interface means for connecting a digital line, and a digital line for connecting a facsimile apparatus having a G3 function and a G4 function. Terminal interface means, when receiving from the analog line, and when receiving from the digital line, notification means for notifying the facsimile apparatus of the incoming via the digital terminal interface; and the incoming analog line or A private branch exchange comprising a connection means for connecting a digital line and the facsimile apparatus via the digital terminal interface means.