JPH04119749A - Private branch automatic exchange - Google Patents

Abstract

PURPOSE:To prevent an external line call from being kept waiting because an external line having a high call restriction level is busy by restricting an external line simultaneous dialing by plural extensions when plural extensions are used in common. CONSTITUTION:An external line dial analysis section 45 obtains a minimum dialing restriction level from a dial signal received from an extension telephone set 3 via an extension interface 2 and a dial reception section 44. When other extension uses the level, one higher rank level is also checked. When no idle level exists even when up to a highest level is checked, a busy tone is sent. The external line dialing is restricted in the unit of groups and the external line simultaneous dialing by extensions in a group is restricted, then the restriction level is made equal even when any external line is in use.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a private branch exchange.

Conventional Technology In the outside line calling function of conventional private branch exchanges, fixed call restrictions were applied to each extension based on the job type and affiliation of the extension caller in order to prevent the abuse of long-distance calls. For example, an extension phone that is restricted from making long-distance calls but only allows local and local calls will not be able to make long-distance calls directly. If you want to make an outside call from such an extension phone, you must go through an operator.

Problems to be Solved by the Invention These conventional techniques are most effective when each extension telephone is assigned to an individual on a one-to-one basis.

However, in general, it is customary for a single department to have multiple telephones shared and operated by a large number of people. Let's consider a case where such a department operates based on conventional transmission regulations. For example, assume that there are three telephones, only one of which can make long distance calls, and the remaining two telephones which can be used for local calls. One time, there were three incoming calls, and after all three were in use, the one for local calls became free. At this point, another person tried to make a long-distance call, but was forced to wait because there were no available telephones that could make long-distance calls. Conversely, in order to be able to make long-distance calls at any time, one telephone that can make long-distance calls must be kept free at all times, and only two can be used for local calls.

In this way, with conventional technology, in order to make a specific call (for example, an international call, a long-distance call, etc.), a specific extension must be kept open at all times, which reduces the efficiency of telephone usage. There was a problem.

The present invention solves the above-mentioned conventional problems.The present invention imposes calling restrictions on an extension group (for example, a department unit) consisting of a plurality of extensions, and allows all telephones in that extension group to make calls assigned to that extension group. It is a way to share regulations. In other words, in the above example, if one of the three telephones currently in use for an incoming call ends and becomes free, the right to make a long-distance call assigned to that extension group will be transferred to that free telephone. The purpose of this project is to provide an automatic branch exchange that can be used to make outside calls.

Means for Solving the Problems In order to achieve the above object, the present invention is composed of an extension telephone, a call path control section, an extension interface, and an extension management section that manages outgoing calls from a plurality of extensions. The management section includes a dial reception unit that receives outgoing dials from extensions, an outside line dial analysis unit that analyzes received dials for outgoing dials, a call restriction level storage unit that stores the call restriction level for each extension group, and a call restriction level storage unit that stores the call restriction level for each extension group. call restriction level usage management means for managing the level used from extensions within the group, and call restriction determination means for making outside calls using the lowest level among the call restriction levels that can be made. The system is arranged to restrict external calls that can be made by multiple extension lines at the same time.

Effect of the Invention With the above-described configuration, the present invention makes it possible to restrict outgoing calls on a group-by-group basis, and to restrict outgoing calls that can be made by extensions within the group at the same time. Further, the call restriction appears to be the same no matter which extension within the group is used.

Embodiment FIG. 1 is a block diagram of the main functions related to the present invention of a private automatic branch exchange according to an embodiment of the present invention. In FIG. 1, l is a call path control unit, 2 is an extension interface, 3 is an extension telephone, 4 is an extension group management unit, 41 is a calling restriction determination means, 42 is a calling restriction level usage status management means, 4
3 is a call restriction level storage unit, 44 is a dial reception unit, 4
5 is an outside line dial analysis section.

FIG. 2 is a flowchart for determining whether a call is possible when making an outside line according to the embodiment of the present invention.

The dial received from the extension telephone 1113 via the extension interface 2 and the dial receiving section 44 is used to obtain the lowest call restriction level that can be made by the outside line outgoing dial analysis section 45 (step 100).

Step 1: The calling restriction determining means 41 determines whether a level equal to or higher than this minimum level is given to the extension group.
01), if it is not given, the channel control unit 1 sends out a reorder tone (step 106). If it has been given, first, the calling restriction level usage management means 42 searches to see if any other extension is using the minimum callable level (step 1o3).

If not, hunt that level (step 107) and make an outside line call (step 1o8).

If the Ikeuchi line is in use, the level one rank higher is investigated (steps 104 and 105). R? If there is no free level even if the level is checked, a busy tone is sent.

As described above, according to the private automatic branch exchange according to the embodiment of the present invention,
The arrangement is such that outside calls are restricted for each group, and outside calls that can be made by extensions within the group at the same time are restricted.
The restriction level is the same no matter which outside line you use.

Effects of the Invention As is clear from the above embodiments, when multiple extensions are used together, it is possible to restrict outgoing calls made by the multiple extensions at the same time, and from the perspective of the extension, all extensions are at the call restriction level. look the same. You can also connect multiple extensions to PB.
For example, if three extension lines are connected as external lines to one PBX, the outgoing call restrictions will appear to be the same no matter which external line is used when viewed from the PBX below. Call restrictions are different, and you no longer have to wait to make an outside call because a high-level outside line is in use.
It is possible to provide an automatic private branch exchange in which the level of call restriction is the same no matter which outside line is used.

[Brief explanation of drawings]

FIG. 1 is a block diagram of the main functions related to the present invention of a private automatic branch exchange according to an embodiment of the present invention, and FIG. 2 is a flowchart showing the processing when making an outside call in an embodiment of the present invention. 1...Call path control unit, 2...Extension interface, 3...Extension telephone, 4...
・Extension group management unit, 41...Calling restriction determining means, 42...Calling restriction level usage management means, 43...Calling restriction level storage unit, 44...
...Dial receiving section, 45...External line outgoing dial analysis section. Name of agent: Patent attorney Haruaki Koyaku, and two other people

Claims (1)

[Claims] It is composed of an extension telephone, a call route control section, an extension interface, and an extension management section that manages outgoing calls from a plurality of extensions, and the extension management section includes a dialer receiving section that receives outgoing dials from the extensions, and a dialer receiving section that receives outgoing dials from the extensions. an outside line dial analysis unit that analyzes outside line dials;
A calling restriction level storage unit that stores the calling restriction level given to each extension group, and a calling restriction level use unit that manages which of the calling restriction levels given to a group is used from an extension within the group. a situation management means, and a call restriction judgment means for making an outside call using a level that is not used by other extensions in the group and the lowest of the call restriction levels that can be made, and A private branch exchange is arranged so that it restricts outside calls from being made at the same time as internal calls within the group.