JPH04339493A - Distributed private branch exchange equipment - Google Patents

Abstract

PURPOSE:To improve the use efficiency of a trunk line by solving such a problem as a tenant cannot use the trunk line any longer, in the case the trunk line allocated to a certain tenant is busy, in the private branch exchange equipment used in a tenant building, etc. CONSTITUTION:Remote devices 13a-13n are allocated to every tenant (a)-(n), and connected to a server PBX 11 by a multiple transmission line 12, respectively. Also, to the server PBX 11, a shared trunk line 10 of each tenant is connected. In such a way, between the private branch exchange equipment and each remote device, line saving is realized, and the use efficiency of the trunk line is improved.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a private branch exchange mainly used in tenant buildings and the like.

0002

[Prior Art] Conventionally, this type of private branch exchange equipment does not allocate a remote device (hereinafter referred to as RS; remote station) to each tenant, but instead assigns several lines housed in the main body of the private branch exchange equipment to each tenant. It was common for private branch exchange equipment and terminals such as telephones to be directly connected on a line-by-line basis. Additionally, each tenant was often forced to install their own private branch exchange equipment.

FIG. 2 shows the system configuration of a conventional private branch exchange installed in a tenant building. In FIG. 2, 100 is a central office line connected to a private branch exchange device 101. In FIG. Extension cables 102a to 102n connect the private branch exchange device 101 and the telephones 103a to 103n. Extension cable 10 wired to tenant a on floor a
Extension cable 102 wired between 2a and tenant n on the nth floor
n is the telephone 103a installed in each tenant.
103n and is directly housed in the private branch exchange device 101. The private branch exchange device 101 performs closed connection control for extensions scheduled in advance for each tenant, thereby realizing an independent extension number system for each tenant and restricting connections between tenants. In addition, the central office line 10
As for 0, lines are assigned to each tenant.
When the telephones 103a to 103n are connected to the public network, lines dedicated to each tenant are assigned. In this way, even with the conventional private branch exchange device described above, by performing control for each tenant, it is possible to deal with the situation as if a private branch exchange device exclusively for the tenant was installed.

0004

[Problems to be Solved by the Invention] However, in the conventional private branch exchange device described above, the telephone and the private branch exchange device must be wired for each telephone, and the private branch exchange device must be shared by all tenants. The initial installation risk for building owners is high, and central office lines are also assigned to each tenant, so even if there are vacant central office lines in the entire private branch exchange system, if the central office line assigned to a certain tenant is blocked, that tenant's There was a problem that the central office line could no longer be used.

The present invention solves these conventional drawbacks, and makes it possible to reduce the wiring between a telephone and a private branch exchange device, and to reduce the initial installation cost of the private branch exchange device. A further object of the present invention is to provide an excellent private branch exchange device that can greatly improve the efficiency of using central office lines.

[0006]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides a plurality of RS assigned to each tenant.
and a private branch exchange device (hereinafter referred to as a server PBX) that exchanges extension lines between a central office line and the plurality of RSs, the server PBX and the plurality of RSs are each connected by a multiplex transmission line, The server PBX has a common office line for each tenant.

[0007]

Therefore, according to the present invention, by installing an RS for each tenant, the initial installation cost of a private branch exchange device can be reduced, and even if the tenant changes, it can be handled relatively flexibly by changing or adding an RS. In addition, the server PBX
By connecting the RS and RS using a time-division multiplexing high-speed transmission method, the wiring between the private branch exchange equipment and the telephone set can be significantly reduced, and the sharing control of the central office line performed by the server PBX can improve the efficiency of the central office line. It has the effect of enabling efficient operation and increasing economic effects.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention. In FIG. 1, reference numeral 10 is a central office line that connects the public network and the server PBX 11. Reference numeral 11 denotes a server PBX, which allocates both a tenant-dedicated office line and a tenant-shared office line to the office line 10. 12 is sending,
It is a 4-wire multiplex transmission line with individual reception wiring, and is connected to the server PB.
X11 and RS13a to 13n installed for each tenant
are connected to each RS. 13a to 13n are RSs that accommodate telephones 14a to 14n. These RSs can be installed for each tenant, or each floor of a building or one RS can be assigned to multiple tenants. In addition to conventional wired telephones, each RS can accommodate wireless cordless telephones and mobile telephones.

Next, the operation of this embodiment will be explained. In FIG. 1, the multiplex transmission line 12 is 2 Mb/s or 8 Mb/s.
Telephone 32 channels or 12 channels depending on b/s transmission speed
Performs multiplex transmission equivalent to 8 channels. Also, 400Mb
By using the /s optical loop transmission method, a larger-scale communication configuration can also be realized.

[0011] Furthermore, the RSs 13a to 13n transmit 64 Kb/s information of telephones accommodated in each to the multiplex transmission line 12.
The multiplexed information from the multiplex transmission line 12 is then separated to each telephone set 14a to 14n.

The server PBX 11 also connects tenant dedicated lines to each tenant, and when all tenant dedicated office lines are in use, allocates usable shared office lines to each tenant. At this time, how many office lines are allocated to each tenant depends on the initial value registration in the server PBX.

As described above, according to this embodiment, by installing an RS for each tenant, it is possible to avoid the risk of initial introduction of a private branch exchange device, and it is also possible to configure a private branch exchange device compatible with each tenant. Can be done. Furthermore, by connecting the server PBX 11 and each RS using a time division multiplexing high-speed transmission method and connecting a shared office line to the server PBX 11, it is possible to save wires between the floor or tenant and the server PBX 11, improving economic efficiency and construction work. This has the effect of increasing communication efficiency and allowing vacant central lines to be shared.

[0014]

[Effects of the Invention] As is clear from the above embodiments, the present invention can avoid the risk of initial introduction of private branch exchange equipment, can flexibly respond to tenant changes and expansions, can save floor wiring, and can use central office lines. This has the effect of realizing a significant improvement in efficiency.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of the present invention.

[Figure 2] Diagram showing the system configuration of a conventional private branch exchange installed in a tenant building

[Brief explanation of symbols]

10　Station line (shared station line) 11 Server PBX 12 Multiplex transmission line 13a-13n Remote device

Claims (3)

[Claims] 1. A distributed private branch exchange characterized by comprising a plurality of remote devices assigned to each tenant, and a private branch exchange device that exchanges extension lines between a central office line and the plurality of remote devices. Device. 2. A distributed private branch exchange device, characterized in that the private branch exchange device and the plurality of remote devices are connected by multiplex transmission lines, respectively. 3. A distributed private branch exchange device, wherein the private branch exchange device has a shared office line for each of the tenants.