JPH0329239B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Technical Field) The present invention relates to an extension busy display control system for an extension busy display device attached to an extension terminal of a digital electronic exchange.

(Conventional technology and its problems) The conventional extension busy display control method scans the line circuit of each extension telephone to obtain call/disconnection information from the telephone and grasp the usage status of the telephone for each telephone line. The central control unit running the telephone transmits information to the busy display device having the telephone number string of the telephone set to indicate that the extension is busy. At this time, the central control unit decodes the line circuit accommodation location information for all telephone numbers that can display the extension as busy, and arranges line circuit usage status signals corresponding to each telephone number. Requires steps.

In this way, the conventional extension busy display control method
Since the system is configured to be controlled by a central controller, there is a problem in that the call processing ability of the central controller is reduced.

(Object of the Invention) The object of the present invention is to provide an information transmitting circuit that transmits information on both the telephone number of an extension telephone and the line status for each line circuit, and a line circuit that connects to a busy display device that transmits information on both the telephone number and the line status. an information receiving circuit that receives telephone numbers and line status information of a plurality of telephone lines in a corresponding manner and displays the line status;
At least one group of these information transmitting circuits and information receiving circuits is connected to a transmitting path and a receiving path of a communication path connected in advance by a switch, and a display control device is connected to the extension line of the telephone line from the line circuit to the busy display device. The above problem is solved by avoiding the intervention of the central control unit in controlling the transfer of busy display information.
An object of the present invention is to provide an extension busy display control system that improves the call processing ability of a central control unit.

(Structure of the Invention) The feature of the extension busy display control method according to the present invention that achieves the above object is that the line circuit package connected to the call path switch of the digital electronic exchange that accommodates the extension terminal of the digital electronic exchange is In an extension busy display control method that displays the busy status of multiple extensions on a busy display device accommodated with a terminal, busy status information is used to display the busy status of the terminal of this extension along with the terminal number of the accommodated extension. an information transmitting circuit that transmits a digital code to the outbound communication path of the communication path switch; an information reception circuit that connects the communication path that is the return path of the communication path switch and receives the busy state information in digital code; The line circuit package includes a display control circuit that extracts the busy status of the extension terminal from the busy status information received by the information receiving circuit, arranges it in accordance with the display conditions of the busy display device, and sequentially transmits and displays the information. , a display control device which is accommodated and connected to the communication path switch, and which arranges busy state information input via the outbound path and sequentially outputs it to the information receiving circuit via the return path; and a display control device which controls the communication path switch; The present invention further includes a central control device that connects the information transmitting circuit to the input of the display control device via the outward path, and the information receiving circuit to the output of the display control device via the return path, respectively. .

(Embodiments of the Invention) Next, embodiments of the extension busy display control system of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram of an embodiment of the present invention, and FIGS. 2 and 3 are block diagrams of the line circuit package (i.e., line circuit) 121 and line circuit package (i.e., line circuit) 122 of FIG. 1, respectively.
4 is a block diagram of the display control device 180 shown in FIG. 1, and FIG. 5 is a block diagram of the display control device 180 shown in FIG. 1.
1, 122 and the display control device 180. FIG.

In FIG. 1, a switch 110 is a telephone set 131, 13 which is mainly used as an extension terminal.
2 to telephone lines 141, 142, line circuit packages 121, 122 (12 for transmitting and receiving busy information)
1. A communication path switch dedicated to busy information transmission is a time-division type communication path switch which is accommodated via 122). The switch 110 also includes a central office line 1 connected to a telephone office.
00 and 101 are accommodated via central office line trunks 160 and 161. The transmission path 151 and the reception path 152 of the communication path of the line circuit package 121 include, for example, the reception path 171 and the transmission path 172 of the central office line trunk 160, and the outgoing path 11 of the switch 110.
1 and return path 112 are connected to complete the communication path. That is, for example, the communication path seen from the line circuit package 121 includes the transmission path 151 of the line circuit package 121 and the switch 11 as an outgoing path.
0, the receiving path 171 of the office line trunk 160, and the office line trunk 160 as the return route.
transmission path 172 of the switch 110, return path 112 of the switch 110,
and line circuit package 121, respectively. The display control device 180 is an information transmission path 15 of the line circuit packages 121 and 122.
3, 157 and information receiving paths 154, 158 are connected to the information receiving path 17 via the switch 110.
3 and an information transmission path 174, and is used to control the busy display of each extension. Busy display device 1
33 connects the information line 1 to the line circuit package 121
43, line circuit package 1
22 is not connected. That is, the reception path 173 of the display control device 180 is connected to the transmission paths 153 and 157 from each line circuit package 121 and 122 via one outgoing path 114, and the transmission path 17
4 is connected via one double path 115 to the transmission path 154 which is connected via the line circuit package 121. The formation of this route is preset by the central controller 190 controlling the switch 110 when the display controller 180 and the busy display device 132 are installed. A central control unit 190 controls each line circuit package 121, 122, switch 11
0, is connected to the central office line trunk 160 and exchanges information to help control the connection of the switch 110, but for display control, the display control device 180 and the busy display device 1 are used.
Switch 110 during initial setup to connect and deploy 33
Since the information link is formed and fixed by controlling in advance, the display control device 180 independently processes the changing busy state display, and the central control device 1
90 may not be involved. There is no involvement of central controller 190. The contents of the switch 110 may be any digital switch, but as one communication path, a voice transmission path represented by a transmission path 151 and a reception path 152 of a line circuit package 121 connected to one telephone 131 is used. Defines a line with a digital code rate of 64Kbps.

Therefore, the outgoing routes 111, 114 and the incoming routes 112, 115 in the switch 110 shown in FIG. 1 are each one communication path, and one line having a transmission speed of 64 Kbps.

Since the busy state information for each telephone has a small number of bits, such as 16 bits, the busy state information for each telephone 13 of the line circuit packages 121 and 122 is
Including 1,132 pieces of information, the 64Kbps circuit of the outward route 114, which is one communication path, is 4000 (64K/16 = 4K)
Multiple lines can be connected. This multiplexing will be explained in detail later.

The display control device 180 receives information on the outbound path 114 via the reception path 173, and displays the busy display device 133.
For example, the received information is rearranged and transmitted to the transmission path 174 according to the display conditions.

The central control unit 190 includes telephones 131, which are housed and connected to the line circuit packages 121, 122.
132 and the busy display device 133, the information on these transmission paths 153 and 157 is arranged and multiple-connected on one communication path of the outgoing path 114 of the switch 110, and the information on the receiving path 1 of the display control device 180 is
73 is connected to the outgoing path 114 to form an outgoing path for information. On the other hand, the central control device 190
Switch 110 connects transmit path 174 of 80 to receive path 154 , 158 of information to each line circuit package 121 , 122 housing busy indicator 133 .
The return path 115 is used to perform duplex connection or broadcast connection while maintaining the multiple connection format carrying a plurality of pieces of information.

In FIGS. 2 and 3, the same components as those in FIG. 1 are given the same reference numerals, so a description thereof will be omitted.
The line circuit package 121 in FIG. 2 and the line circuit package 122 in FIG.
16 and display control circuit 217. line circuit package 121,
122 is a telephone line 141, 14, respectively.
2, and the other is connected to the switch 110 with transmission paths 151, 155 and reception paths 152, 156, respectively, and detects call origination, response, and disconnection of telephones 131, 132 connected to telephone lines 141, 142; A line monitoring circuit 201, 301 including a circuit for sending out a calling signal, supplying power, etc., and a telephone 13 connected to this line monitoring circuit 201, 301.
Memory circuit 21 that stores 1,132 telephone numbers
1,311, and call/disconnection detection circuits 212, 312 that detect call/disconnection information of the telephones 131, 132 from the line monitoring circuits 201, 301.
With this call origination and disconnection information, the telephone 13
1,132 phone numbers memory circuit 211,311
Take this phone number and phone line 14 from
The information transmitting circuits 213 and 313 transmit information on both line states of the switch 110 and the communication path of the switch 110 in synchronization with the synchronization signal received from the synchronization signal reception paths 214 and 314. Interface circuit 2 for digital transmission
15, 315, and especially in the case of the line circuit package 121 of FIG.
Information receiving circuit 2 which inputs information from 15 and classifies the information.
16 and a display control circuit 217 that transmits display information matching the conditions of the busy display device 133 to the information line 143, and in addition to transmitting and receiving information required for central control to and from the central control device 190, Exchange and receive information.

In FIG. 4, the display control device 180 connects communication paths to an information receiving path 173 and an information transmitting path 174.
An interface circuit 411 that exchanges information at a code rate of 64 Kbps, a temporary storage circuit 412 that temporarily stores received information, and a display arrangement of the temporarily stored information on a busy display device 133 (FIG. 1). An information transmitting circuit 413 that is sequentially extracted and transmitted during transmission, and a control circuit 4 that controls these circuits.
21.

Next, the time chart in Figure 5 and Figures 1 to 4.
With reference to the block diagrams up to the figure, display control device 1
The multiplexing of information received and transmitted at 80 will now be described. Here, as an example of the present invention, the telephone numbers of telephones 131 and 132 and the telephone line 1
41,142 line status (telephone line 141,14
The busy display information including both the call origination and disconnection status of the telephones 131 and 132 connected to the telephone lines 131 and 132 connected to the telephone lines 141 and 142 is composed of 16 bits, and voice transmission is performed on the telephone lines 141 and 142 at a coding speed of 64 Kbps, respectively. Suppose then. At this time, the line circuit package 12
1, 122 information transmission paths 153, 157 of 16-bit configuration busy display information are sent to the switch 11, respectively.
The code speed of voice transmission on the outbound path 114 of the communication path 0 is
In order to match 64Kbps, Figures 2 and 3
The synchronization signal received from the synchronization signal reception paths 214 and 314 in the figure is 0.25ms (16bit/(64Kbit/sec) =
The synchronizing signals are arranged at intervals of 0.25 msec), and one of the synchronizing signals arranged at this interval is supplied to one line circuit package for each period of the synchronizing signals. This synchronization signal is connected to the information receiving path 173 through one communication path (64Kbps line for voice transmission) which becomes the outgoing path 114 of the switch 110.
The signal is supplied from a switch 110 that performs time-division multiplex connection. The 16-bit busy display information is 4000 times per second ((64Kbit/
sec)/16bit=4000/sec) line, and when connecting the busy display information of 10,000 lines to the outgoing path 114 of one communication path, a certain Focusing on a specific telephone line, the maximum delay time for display correction is 2.5 seconds.

In FIG. 5, information A of the line circuit package 121 is transmitted to the transmission path 153 by a synchronization signal received from the synchronization signal reception path 214. Information B of the line circuit package 122 placed next to the line circuit package 121 is sent to the transmission path by the synchronization signal received from the synchronization signal reception path 314 with a delay of 0.25 ms from the synchronization signal received from the synchronization signal reception path 214. 157 and switch 1
10 has a capacity of 10,000 lines, synchronization signals are received from each of the synchronization signal receiving paths 214 and 314 at 2.5 second intervals. Therefore, information for 10,000 lines multiplexed by the switch 110 is arranged and transmitted for 2.5 seconds at a code rate of 64 Kbps on the outgoing path 114 of the communication path, and is transmitted to the display control device 180 via the information receiving path 173. is input. Display control device 1
The information output from the switch 80 via the information transmission path 174 includes the telephone number of each telephone set and 16-bit information of the line status of the telephone line for 10,000 lines at a cycle of 2.5 seconds, and is sent to the return route of the switch 110. 115. The return path 115 is the receiving path 154, 158 of the line circuit package 121, 122.
The transmission path 17 of the display control device 180 is
The information of No. 4 is transferred as is to receiving paths 154 and 158.

A busy display device 133 is connected to the line circuit package 121 in FIG. No information receiving circuit is provided. Since the line circuit package 122 only receives information from the reception path 158, if the line circuit package 121 to which the busy display device 133 is connected is inserted at this position, the information received from the reception path 158 will be It can be utilized. Depending on the insertion position of the line circuit package, one synchronization signal is extracted for each line circuit package from a series of synchronization signals every 0.25 ms on the mounting rack, allowing multiple connections to the switch for each mounting rack. can be easily realized.

Furthermore, the writing of telephone numbers into the memory circuits 211, 311 of the line circuit packages 121, 122 must be performed from at least one of the master telephone and the operation console via the central control unit 190 at the time of initial setting, and from a connected telephone. processing in a line circuit package.

In the above embodiment, information is multiplexed using a synchronization signal on the forward path of the switch, but multiple pieces of information to be input in parallel, that is, the information transmission paths 153 and 157 in FIG. 1 are connected to the switch 110. Before doing so, a multiplexing device for rearranging the serial time slots of one time division circuit may be installed, and the output of this multiplexing device may be connected in advance to the receiving path 173 of the display control device 180 via the forward path 114 of the switch 110. This multiplexing device may be installed between the switch 110 and the display control device, or within the display control device, although the effect of using the outgoing line within the switch will deteriorate.
The display control device can also form one transmission frame by combining information for each telephone line for multiple lines and send it back to the line circuit side. The line status information contained in this information can also be used to reduce the bit rate of the information and simplify the control system by transmitting only changes in the line status in accordance with the synchronization signal. Also, on the side that connects to the information transmission path and reception path of the line circuit package, multiple switches are connected to create a single communication path during initial setup.
During normal operation, multiple connections of switches do not place a load on the central controller. When the display correction cycle per call path becomes long, multiple call paths are provided, each of which divides the telephone lines into groups, and is equipped with multiple display control devices, so that each line circuit package corresponds to two or more groups of telephone numbers. By providing an information receiving circuit, a display control circuit, and an information line, it is possible to shorten the display correction cycle.
In addition, in the above embodiment, the communication path switch was explained as a switch network of circuit exchangers, but in the case of a link configuration using a high-speed path loop, one
The information on the expressway of the line may be arranged for the outbound and return routes together in the communication route to be picked up by the display control device.

(Effects of the Invention) As explained above, according to the extension busy display control method of the present invention, information on both the telephone number of the extension telephone and the line status is transmitted for each line circuit (that is, line circuit package). The information transmitting circuit and the line circuit connected to the busy display device include an information receiving circuit that displays the line status corresponding to the telephone number and receives information on the telephone numbers and line status of a plurality of telephone lines all at once. The information transmitting circuit and the information receiving circuit are connected as at least one group to the transmitting path and the receiving path of the telephone line, which are connected in advance by a switch, and a display control device is connected to the telephone line from the line circuit to the busy display device. By controlling the transfer of the busy display information by the display control device, the intervention of the central control device can be avoided and the processing capacity of the central control device can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIGS. 2 and 3 are block diagrams of the line circuit package of FIG. 1, FIG. 4 is a block diagram of the display control device of FIG. 1, and FIG. The figure is a time chart illustrating the time relationship of information transfer between the line circuit package of FIG. 1 and the display control device. 100,101...Station line, 110...Switch, 111,114...Outgoing route, 112,115...
... Return trip, 121, 122 ... Line circuit package, 131, 132 ... Telephone, 133 ... Busy display device, 141, 142 ... Telephone line, 143
...Information circuit, 151, 153, 155, 15
7,172,174,176...transmission path, 15
2,154,156,158,171,173,
175, 214, 314...reception path, 160, 1
61... Office line trunk, 180... Display control device, 190... Central control device, 201, 301...
... Line monitoring circuit, 211, 311 ... Memory circuit, 212, 312 ... Calling/disconnection detection circuit, 2
13,313... Information transmission circuit, 215,31
5,411...Interface circuit, 216...
Information receiving circuit, 217...Display control circuit, 412
... Temporary storage circuit, 413 ... Information transmission circuit, 4
21...Control circuit.

Claims (1)

[Scope of Claims] 1. An extension that displays the busy status of multiple extensions on a busy display device housed together with the terminal by a line circuit package connected to a call path switch of a digital electronic exchange that accommodates the terminal for the extension. In the busy display control system, an information transmitting circuit that transmits the terminal number of the extension to be accommodated and the busy state of the terminal of this extension as busy state information in digital code to the outgoing call path of the call path switch; an information receiving circuit that connects the return path of the call path switch and receives the busy state information in the digital code, and detects the busy state of the extension terminal from the busy state information received by this information receiving circuit. The line circuit package includes a display control circuit that is arranged in accordance with the display conditions of the busy display device and is sequentially transmitted and displayed; and the busy state information that is accommodated and connected to the call path switch and input via the outward path. a display control device that sequentially outputs the information to the information receiving circuit via the return path; An extension busy display control system comprising: a central control unit that connects each receiving circuit in advance to the output of the display control unit via the return path.