JPH0393388A - Private branch exchange having direct-in dial function - Google Patents

Abstract

PURPOSE:To minimize the possibility of no response of a called party by setting variably the connection to an extension terminal equipment possible to make called party response at any time to an incoming call to a direct-in dial service number. CONSTITUTION:Numbers of direct-in dial trunk lines and plural extension terminal sets are stored with relation into a storage means 22 of a private branch exchange 10. The relation is set according to a time zone in which a called party can reply by the terminal equipments. When a call comes to a trunk line by a direct-in dial number, a control means 20 references the storage means 22 and selects an extension terminal equipment in response to the command signal at a time zone of the incoming call to the trunk line and sets the incoming connection to an extension terminal equipment possible of called party reply. Thus, the possibility of called party no reply is minimized.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field) Especially direct in dial (
(Prior art) Regarding a private branch exchange having a 0101 function, a conventional private branch exchange having a direct in-dial function has a direct in-dial service i from a central office.
A central office line for PBX 0101 was accommodated, and the number for PBX RO10, which was used to receive calls and call a specific extension terminal, was fixedly assigned the number of that extension terminal. The caller from the public network selects the P that corresponds to the desired extension terminal.
By dialing the BX DIo number. It is directly connected to terminal #l without going through the procedure of going through a PBX switchboard.

(Problems to be Solved by the Invention) As described above, PBX DID is a convenient incoming call service system. However, in the conventional method, one PBXDID
Because one internal number was fixedly assigned to each extension number, if the caller at that extension terminal was absent on holidays or at night, the incoming call would not be answered.
The drawback was that service quality deteriorated. The present invention eliminates the above drawbacks. The purpose of this service is to provide a private branch exchange with a direct in-dial function that connects to a terminal that has the possibility of answering the called party in response to an incoming call using a PBX DID number. (Means for Solving the Problems) According to the present invention, a plurality of inner terminals and office lines are accommodated, a switch means for setting a connection between them, and a control means for controlling the setting of the connection in the switch means. A private branch exchange having a direct in-dial function has a storage means for storing the number of an extension terminal in relation to a direct in-dial office line that receives a call by direct in-dial, and the storage means includes one direct in-dialing function. Regarding the central office line for in-dial, the numbers of multiple terminals among the extension terminals are stored, and when a call is received on the central office line for direct in-dial, the control means refers to the storage means and determines the central office line for direct in-dial. Select one of the stored extension terminals according to the time period or instruction signal of the incoming call, and control the switch means to complete the selected one!
j! Connect the terminal to the central office line. (Function) According to the present invention, the private branch exchange has a direct in-dial central office line and a plurality of central branch exchanges. ! It is associated with the terminal number and stored in the storage means. This association is established according to the time period during which the called party is available at those terminals. When a call arrives at that station using the direct in-dialing number,
The control means refers to the storage means and selects an extension terminal according to the time zone of the incoming call or the instruction signal for the call,
This establishes an incoming connection to an extension terminal that may respond to the called party. (Example) Next, an example of a private branch exchange having a direct in-dial function according to the present invention will be described in detail with reference to the attached drawings. FIG. 1 is a relay system diagram showing an embodiment of the private branch exchange of the present invention. Private branch exchange W (PBXI 10 is equipped with direct in-dial service (PBX 0101 m function), and multiple extension terminal numbers are assigned to one PBX DID number.
In this embodiment, the PBX DID is selectively used depending on the time period of the incoming call. However, the selective use of the last 80Z number among the plural numbers may be performed by, for example, a switching signal from the outside, instead of switching based on the time zone. The local exchange IJIO performs the call connection through the time division switch ITsWI 10. The time division switch 11 includes a plurality of subscriber circuits 1stIcI 14. 16. and multiple central office line trunks + (1:OTI 12) are connected.In order to avoid complicating the diagram, the subscriber circuit (S
L[:+ 14.16. and central office trunk (COT)
Only 12 are shown. The former has extension terminals A and B such as telephones, and the latter has a central office exchange (
A station 4930 to (not shown) is accommodated. central line 30
is accommodated in the central office switch of the public line network, and the PB to a specific extension terminal of the private branch exchange $110 at the central office switch.
X Selected digit requesting DID service, i.e. PB
X This is the subscriber line selected by the DID number. The central office line trunk L2 is the public line II! This is a trunk circuit that receives incoming calls from a network terminal, such as C, via the PI, and maintains and monitors the line. The time division switch 11 is a central processing unit (CPIJI 20
The call connection between those people is controlled by The central processing unit 20 has a central office line trunk l2 and a storage device IMkl+.
The storage device 22 is a memory that stores control programs and data including call processing programs necessary for controlling call connections via the switch 11. Regarding the present invention, number conversion tables 101 - 103 (
(Fig. 2) is also stored here.

When a central office switch selects a central office 30 with a specific PBX DID number and activates a central office trunk I2, the processing unit 20, in accordance with the call processing program and data in the storage device 22, performs the processing shown at the central office switch 24 or 26. Inside the central office trunk L2 on the route! 1! Connect to terminal A or B. Which of the routes 24 and 26 to select is determined by indexing the number conversion table of the direct in-dial service provided in the storage device 22. As shown in Figure 2, the number conversion table is basically as follows. P.B.
It consists of an X010 number storage table 101 and extension number storage tables 102 and 103. The former is an extension number storage table corresponding to the PBX DID number of the exchange IO! This table stores addresses indicating storage locations where specific extension terminal numbers in 02 or 103 are stored.

for example. For PBX DID number 1, the extension number storage table 102 is
, the storage location address where the internal number of terminal A is stored, or the storage location address where the extension number of terminal B in the extension number storage table 103 is stored.
In this embodiment, the storage tables 1028 and 103 are respectively 1141 and 1141. This table lists the callable terminals in time periods TI and T2. For example, assume that extension terminals A and B are located far apart, and the called party of terminal A is available to answer during time period TI, and the called party of terminal B is available during another time period T2. Ba.
The address of time zone TI in the PBX DID number storage table 101 indicates the storage location of the extension number of terminal A in table 102, and the address of time zone T2 indicates the storage location of the extension number of terminal B in table 103. , are linked respectively. For this reason, the central processing unit 20 is equipped with a clock (CDRI 28) and manages the current time and time zone.For example, a private branch exchange Ill10 receives a call from a subscriber M terminal C of the public network to the station I#130. , the central processing unit 20 accesses the PBX of the storage device 22 from the accommodation position of the station 1a30.
Search the DID number storage table 101. The central processing unit 20 determines the time period TI of the time and number generated by the clock 28.
and T2, and if the current time is within the time zone Tl, the extension number storage table 102 is indexed and the extension terminal A is
Select. The processing device 20 switches the time division switch +1 based on the accommodation position of the selected terminal A in the switch 11.
and calls terminal A. When the caller answers at terminal A, a switch path 24 is set up between the subscriber circuit l4 and the central office line trunk l2, and between terminal A and the central office trunk trunk l2,
Connect. However, if the current time is in time zone T2,
The corresponding extension number storage table 103 is indexed, the route 26 is set, and the inside! I! Connect terminal B to central trunk l2
Connect to. In this way, incoming calls from the direct in-dial service are always routed to an extension terminal that has a high probability of being answered by the called party. Figure 3 shows another example of the structure of the number conversion table. P
BX DID number storage table 104 contains the number of PBX
DID numbers l to M and the time slots TI. in which the terminal can respond corresponding to those numbers. M groups of T2 are registered. Table 18 shows the time period T1 for each PBX DID number.
5 is linked to the extension number of terminal 1-m.

In addition, each time period T2 is commonly used for the terminal lm in the table 105.
It is linked to +ll. For example, if the time period Tl is the working hours of the office and the time period T2 is the non-working hours, a call that arrives at the PBX DID number 1-M during the working period TI will be sent to the corresponding #l terminals l-M, respectively. Connected. In contrast, PBX D received a call during non-working time T2.
ID calls are commonly made to the control room or an extension number (l) where a resident person is located.
Connected to the ni terminal. In this embodiment, m PBX D
-411 extension terminals are associated with an ID number, and a direct in-dial service to m terminals is provided during the day, and at night and on holidays, the system is commonly aggregated to one terminal where the called party is located. I'm taking it. Figure 4 shows yet another example of a number conversion table.
In this configuration example, the central processing unit 20 switches extension terminals based on external signals rather than based on time zones.
PBX Dl! ) number storage table 101 (DPI
]X DID number l is two gates Gljl5 and G2
The internal numbers of terminals A and B in the extension number storage tables 102 and 103 are linked through. By enabling the gate G1 or G2 by the signal El or E2. Incoming calls to PBX DI number l are PBXD
selectively linked from the ID number storage table 102 to either the extension number storage table 102 or 103;
This incoming call is connected to extension terminal A or B accordingly. The signals El and E2 may be provided manually by the operator of the exchange Il 10, or may be provided externally through a line, or may be generated in accordance with the time generated by the clock 28. (Effects of the Invention) As explained above, according to the present invention, in response to an incoming call to a direct in-dial service number, a connection is variably set to an extension terminal that has the possibility of being answered by the called party at any time. By doing so, it is possible to minimize the possibility of the called party not responding in the conventional same service.

[Brief explanation of drawings]

Fig. 1 is a relay system diagram showing an actual example of a private branch exchange having a direct in-dial function according to the present invention, Fig. 2 is a diagram showing an example of the configuration of a number conversion table in the embodiment shown in Fig. 1, and Fig. 3 The figure below shows another example of the structure of the number conversion table. FIG. 4 is a diagram showing still another example of the structure of the number conversion table. Theory of q of main 0′ H 10. ．． ．． ．． ．． ．． Campus traffic PAm11. ．．
．． ．． ．． ．． Time division switch 12. ．． ．． ．． ．．
Central office trunk 14.16. ．． ．． ．． Subscriber circuit 20. ．． ．． ．． ．． ．． Central processing unit 22. ．．
．． ．． ．． ．． Storage device 28. ．． ．． ．． ．． ．． Clock 101.1ro 4. ．． ．． ．． PBX DID
Number storage table L2.103.105 Extension number storage table A, B. extension terminal

Claims (1)

[Scope of Claims] A direct in-dial function that accommodates a plurality of extension terminals and office lines, and has a switch means for setting up a connection between them, and a control means for controlling the setting of the connection in the switch means. In a private branch exchange, the exchange has a storage means for storing the number of the extension terminal in relation to a direct-in-dial central office line that receives a direct-in-dial call, and the storage means includes one direct-in-dial number. Numbers of a plurality of terminals among the extension terminals for the central office line are stored, and when a call is received on the direct in-dialing central office line, the control means refers to the storage means and selects the direct in-dialing central office. Selecting a terminal corresponding to the time period or instruction signal of the incoming call from among the plurality of extension terminals stored for the line, and controlling the switch means to connect the selected extension terminal to the central office line. A private branch exchange with a direct in-dial function.