JPH03243036A - Composite terminal adaptor - Google Patents

Abstract

PURPOSE:To simplify this composite terminal adaptor without connecting a bus line by selecting the port of a service terminal and connecting an interface part to the selected port. CONSTITUTION:An ISDN network interface part 2 receives a SETUP message from an ISDN network and a switching control part 3 processes a high-order layer consistency information element. A high-order layer characteristic identification(ID) element is read in and plural service functions are compared with each other. When a service terminal port 5 is being driven or the port 5 is not present thereon, call setting is canceled and an REL-COMP message is transmitted to the ISDN network. When the port 5 is present thereon, the port 5 receives the call setting and a CONN message is transmitted to the ISDN network. When a communication state is held after completing the call setting procedure, the control part 3 controls a port switching part 4 to select and connect an interface part 2 and the port part 5.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal device connected to an I5DN (integrated service digital network).

[Summary of the invention]

Different services, e.g. telephone (Recommendation G).

711), G2/3 facsimile (Recommendation T, 6
2), G4. Facsimile Class 1 (Recommendation 7.5
03), Telete 7x (Recommendation T, 62.T, 70),
A port section for multiple service terminals supporting telex, etc., a network interface section connecting to an integrated services digital network (ISDN), and a "higher layer a switching control unit having a function of selecting a corresponding service terminal port of the service terminal port unit using a “consistency information element” as a selection identifier and connecting it to the network interface unit; and a boat switch unit. This makes it possible to have multiple functions on one terminal.

[Conventional technology]

The standardization of the 15DN interface, which performs communication control that unifies all terminals and communication networks using digital signals, is progressing, and the 15DN interface allows multiple terminals to be connected to one Hassline. In order to process the functions of different services, a circuit switching system is installed to control this path line and has an interface function with the 15DN network, or multiple terminals with different functions are connected to the Hasline via a terminal adapter. and are processing different services.

[Problem to be solved by the invention]

In the conventional circuit switching system described above in which multiple terminals and exchanges are connected by one Hass line, a terminal corresponding to each service is required, and in addition, each terminal has an interface function with ISDNm. For terminals that are necessary and do not have an interface function with l5DN III4, it is necessary to use a terminal adapter between the l5DN network and each service function terminal. A circuit switching system is also required to do this, and since multiple terminals are connected, the system itself becomes large-scale.

[Means to solve problems]

In order to solve the above problems, the present invention provides a plurality of different services, such as telephone (Recommendation G, 711),
G2/3 facsimile (Recommendation T, 62), G4. A plurality of service terminal ports corresponding to facsimile class 1 (Recommendation T, 503), teletex (Recommendations T, 62.T, 70), telex, etc., and the service terminal port section are connected to an integrated service digital network ( ISDN
) and a call corresponding to the service terminal port of the service terminal port section,
Information elements of call setup messages (TTC Recommendation Q.93)
Switching control having a function of selecting a corresponding service terminal port of the service terminal port section using the "higher layer compatibility information element" which is one of 1) as a selection identifier, and connecting it to the network interface section. Department,
and a boat switch section.

[Effect]

According to the above configuration, there is no need to provide a path line to connect multiple terminals to process different services, and there is no need to control the path line, so there is no need to provide a circuit switching system. It disappears.

Furthermore, there is no need to have an l5DN interface for each service terminal, and there is no need to have a terminal adapter for each terminal in order to connect terminals that do not have an l5DN interface.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a system configuration diagram showing an overview of the present invention.

The device of the present invention is composed of a main body 1, an 15DN network (subscriber line) interface section 2, a switching control section 3, a boat switch section 4, a service terminal port section 5, and the like.

FIG. 2 is a flowchart showing the processing state of the present invention.

The operation of the present invention will be explained using FIG. The l5DN network interface section 2 receives 5ETUP from the l5DN411.
(call setup) message is received 21), and the [higher layer compatibility information element] included in the 5ETUP (call setup) message is processed by the switching control unit 3 (
22). The processing procedure of the switching control section 3 at this time is as shown below. First, the "higher layer characteristic identification element" of the "higher layer compatibility information element" is read (22), and a plurality of service functions provided in the composite terminal device of the present invention, such as telephone (recommendation G, 711), is read (22).
, G2/3 facsimile (Recommendation T.

62), G4. Facsimile class 1 (Recommendation T.

503), Teletex (Recommendation T, 62.T, 70),
Compare with telex etc. If the service terminal boat 5 that can respond at this time is currently in operation (24)
, or if the service terminal boat 5 corresponding to the requested service does not exist (23), 5ETUP
(Call Setup) message, the call setup is rejected (26), and the REL COMP (Release Complete) message is sent from the L5DN network interface unit 2 to the L5DN.
Send to the rope. If the corresponding service terminal boat 5 exists and is movable, individual settings are accepted (25
), C0NN (response) message from the I5DN network interface section 2 to the I5DN network and after the call setup procedure is completed, when the communication is in progress, the switching control section 3 transmits the message to the boat switch section 4. control l5
The DN network interface unit 2 and the service terminal boat 5 corresponding to the call are selected and connected (27).

[Effects of the invention] As described above, a plurality of different services, such as telephone (
Recommendation C, 711), G2/3 facsimile (Recommendation 7.
62), G4. Facun Milli Class 1 (Recommendation T, 503
), Teletex (Recommendations T, 62, T, 70),
A boat section for a plurality of service terminals corresponding to telex, etc., a network interface section having a call setting function with an integrated services digital network (ISDN), and a call section corresponding to each service terminal boat of the service terminal hoard section. , call setup message information elements (TTC Recommendation
a switching control unit having a function of selecting each service terminal port of the service terminal port unit using high-layer consistency, which is one of the above-described If a composite terminal adapter with a switch section is used, it is not necessary to connect multiple terminal adapters to each terminal via a pass line in order to connect terminals without an I5DN network interface with different service functions to the I5DN network. It disappears. Furthermore, since there is no need to have a lot line, there is no need to have a line switching system, and the system itself can be simplified. Further, since only one terminal is recognized as an ISDN terminal, it is also possible to connect a plurality of terminal devices to the 15DN network (DSLI).

[Brief explanation of drawings]

FIG. 1 is a system configuration diagram showing an overview of the present invention, and FIG. 2 is a flowchart showing the processing state of the present invention.・Composite terminal adapter ・15DN network interface section Switching function control section ・Boat switch section ・Service terminal port section ・CPU ・Memory or more

Claims (1)

[Claims] A port section for multiple service terminals that supports telephone, telex, etc., a network interface section that has a call setup function with an integrated services digital network (ISDN), and a high layer compatibility section that is one of the information elements of a call setup message. A composite terminal comprising a switching control unit and a port switch unit, each having a function of selecting a corresponding service terminal port of the plurality of service terminal port units using an information element as a selection identifier and connecting it to the network interface unit. adapter.