JPH10303988A - Band management system in multimedia router - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform communication without falling back a FAX band to a low band by previously registering a terminal type such as telephone/FAX and reserving band width in accordance with a terminal. SOLUTION: When a FAX terminal 31 makes a call out and performs FAX communication, a dial number is exchanged between a PBX 11 and a multimedia communication device 1 through a PBX interface part 101 based on a previously defined procedure. When a band managing part 110 receives a call out frame, it extracts the opposite party dial number in the frame and collates it with a FAX terminal registration table 111. It retrieves whether the opposite party is a FAX terminal or not from the dial number of an incoming destination. When the opposite party is a FAX, band research in a sending end communication device is performed. When a band is reserved, a frame transmitting and receiving processing part 112 sends a call out frame and adjusts whether band reservation is possible or not among the device 1, a repeater and a receiving end device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a band management system for a multimedia communication device capable of integrated communication of voice and data, and more particularly to a communication band required for voice and a communication band required for facsimile. The present invention relates to a system for guaranteeing and managing a communication band when the communication band is large.

[0002]

2. Description of the Related Art Conventionally, when a call signal is received from a PBX, a multimedia communication apparatus adjusts whether or not a band for voice communication can be secured between a relay station apparatus and a receiving station apparatus. Do.

[0003] However, in the conventional system, when the communication is switched to the facsimile communication instead of the voice communication, the facsimile communication which requires a band higher than the voice communication cannot be performed.

Japanese Patent Application Laid-Open No. 8-204671 discloses that
A multimedia communication device that is connected to a digital communication network and multiplexes and transmits and receives a plurality of media information. A simple multimedia that can arbitrarily allocate the used transmission band for each media without using a time-division multiplexing device. As a communication multiplexing method and apparatus, a multimedia multiplexer accommodating each of an audio signal, an image signal, and a data signal, and controlling the multiplexer to perform audio / image /
A configuration including a control circuit that maps a data signal to the entire transmission band has been proposed.

Japanese Patent Application Laid-Open No. 7-248980 discloses a communication method for multimedia information, in which when a vacant area runs short when a communication band is allocated to new media information, the used bandwidth of the media information during communication is reduced. In the range above the minimum bandwidth required to maintain the quality of
On the other hand, a method has been proposed in which the bandwidth allocated to media information during communication is increased within the maximum bandwidth when there is room in the bandwidth.

[0006]

As described above, the conventional communication system has the following problems.

[0007] A multimedia communication apparatus capable of performing integrated communication of voice and data while guaranteeing a band needs to be able to communicate even when switching from voice communication to FAX communication.

[0008] However, in the conventional system, the F band is smaller than the voice band.
If the AX band is larger, communication is not possible.

The reason is as follows. When the multimedia communication apparatus receives a call signal from the PBX, it adjusts whether or not a band for voice communication can be secured between the relay station apparatus and the receiving station apparatus.

At this time, since the reserved band is used for voice communication, once the communication path is established, to change the band, it is necessary to adjust the band again between the devices that will be the communication path. Or the call path in the device must be disconnected once and the calling process must be performed again.

Therefore, after receiving the FAX signal, it cannot be processed substantially.

SUMMARY OF THE INVENTION Therefore, the present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a multimedia communication apparatus capable of performing integrated communication of voice and data while guaranteeing a band, by using a FAX rather than a voice band. An object of the present invention is to provide a bandwidth management method in a multimedia router that enables communication without causing the FAX bandwidth to fall back to a low bandwidth even when switching from voice communication to FAX communication when the bandwidth is larger.

[0013]

SUMMARY OF THE INVENTION To achieve the above object, the present invention provides a multimedia communication apparatus capable of integrated communication of voice and data, and a transmitting and receiving station, Means for adjusting the communication band between stations relaying the same, means for automatically detecting switching from voice communication to facsimile communication, fallback means for requesting a facsimile terminal to reduce the communication speed, and multimedia. The communication device has a facsimile terminal registration table, and a means for analyzing a dial number received from the PBX to search for a facsimile terminal, and automatically registering in the facsimile terminal registration table when a transmission destination is recognized as a facsimile terminal Means,
When the communication band of voice and the communication band of FAX are different, at least a necessary minimum band is secured and communication is performed.

[0014]

Embodiments of the present invention will be described below. According to a preferred embodiment of the present invention, in a network configured with a multimedia communication device capable of integrated communication of voice and data, a transmitting station and a receiving station are provided.
And a means for adjusting the communication band between the devices of the respective relaying stations. The multimedia communication apparatus further includes means for automatically detecting switching from voice communication to facsimile communication, and reducing the communication speed to the facsimile terminal. Fallback means that can be requested and PB that accommodates telephones and fax terminals
A table in which the station number of X and the extension number of the FAX terminal accommodated therein are registered, and the station number and extension number are analyzed from the connection destination dial number received from the PBX, and the table is searched, and the connection destination is the FAX terminal. Means for judging whether or not the destination is a facsimile terminal, and if not registered in the facsimile terminal registration table, means for automatically registering an office number and extension number in the facsimile terminal registration table And the necessary bandwidth is secured when the voice communication band and the fax communication band are different,
connect.

[0015] In all the multimedia communication apparatuses accommodating the PBX, when a call signal is received from the PBX, the FAX terminal registration table is searched from the station number and extension number to determine whether or not the destination terminal is a FAX terminal. In the case of a FAX terminal, even if the communication is initially voice communication, it is possible to adjust the bandwidth reservation in advance with the FAX bandwidth.

Further, automatic registration can be made in the FAX terminal registration table.
Alternatively, when communicating for the first time, the station number and extension number are automatically registered. Thus, from the next time, when adjusting the bandwidth reservation, it can be adjusted from the beginning as a fax band.

If the band can be secured, the voice call can be changed to the FA
Even if the communication is switched to the X communication, the FAX communication can be performed without performing the bandwidth expansion processing.

[0018]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of the present invention;

FIG. 1 is a diagram showing the configuration of one embodiment of the present invention. Referring to FIG. 1, an embodiment of the present invention provides multimedia communication apparatuses 1 to 4 with serial terminals 4 respectively.
1-43, Ethernet (Ethernet) terminal 51
To 57, a router 61 and the like are connected to form a data communication network, and the multimedia communication devices 1 to 4 accommodate PBXs 11 to 13, respectively, and can integrate voice communication.

From the originating multimedia communication device 1,
When a voice call is made between the receiving station 3 through the relay station 2, adjustment is made between 1-2 and 2-3 to determine whether or not a communication band can be secured. Call processing is performed only when the bandwidth can be ensured by.

The PBXs 11 to 13 include telephones 21 to 23, respectively.
In addition, FAX terminals 31 to 33 can be accommodated. The voice band is voice-compressed to 8 Kbps or less.
For example, it is configured by a terminal that communicates at 14.4 Kbsp.

FIG. 2 is a block diagram showing the configuration of the multimedia communication apparatus 1 in the embodiment shown in FIG. In FIG. 2, 101 is a PBX interface unit, 102 is a signaling detection unit, and 103 is a FAX
The detection units 104 and 105 are a voice / fax switching unit,
06 is a codec (CODEC) unit, 107 is a FAX modem unit, 108 is a voice protocol processing unit, 109 is a call processing unit, 110 is a band management unit, 111 is a FAX number registration table, and 112 is a frame transmission / reception processing unit. I have.

In the following, referring to FIG. 1 and FIG.
A call is made from the fax terminal 31 on the X11 side, and the fax terminal 32
The following describes an example in which communication is performed between.

A call is made from the FAX terminal 31, and a dial signal is transmitted to the PBX 11.

The PBX 11 and the multimedia communication device 1
During the period, the dial number is transferred according to a predetermined procedure through the PBX interface unit 101 in the apparatus.

When a call is detected by the signaling detection unit 102, the voice / fax switching units 104 and 105 are connected to the codec unit 106.

[0027] In the voice protocol processing unit 108, the outgoing call signal is framed, an information header is added, and the signal is transmitted to the call processing unit 109.

In the call processing unit 109, from the dial number,
A destination IP (Internet Protocol) address is obtained. From the IP address, the route of the connection destination is obtained and passed to the bandwidth management unit 110.

Upon receiving the outgoing call frame, band management section 110 extracts the destination dial number in the frame, and
Check against the AX terminal registration table 111. A search is made from the dial number of the called party as to whether the other party is a FAX terminal.
The details will be described later with reference to FIG.

The search result of whether or not the terminal is a facsimile terminal is determined by the band management unit 110. If the result is "the destination is a facsimile", the transmission band value necessary for facsimile communication is used. A bandwidth check in the communication device 1 is performed. As a result, when the band is secured, the calling frame is transmitted from the frame transmission / reception processing 113, and the originating multimedia communication apparatus 1 is transmitted.
-Between the relay device 2 and between the relay device 2 and the receiving side device 3,
An adjustment is made as to whether a band can be secured.

After the link is established, frames are directly transmitted and received between the protocol processing unit 108 and the frame transmitting / receiving unit 112. When the FAX terminal 31 switches from voice communication to FAX, the multimedia communication device 1 receives the data through the PBX 11.

The switching signal is sent to the facsimile detection unit 103
And the voice / fax switching units 104 and 105 are set to F
Switch to the AX modem unit 107 and continue communication through the FAX modem.

In addition, when a call is first made to the called FAX terminal (for example, the terminal FAX 43 accommodated in the PBX 13 in FIG. 1) or when the terminal is changed from a telephone to a FAX terminal, a call processing is performed. When searching for FAX terminals,
When the switching signal is detected by the FAX detection unit 103 even though it has not been registered in the FAX terminal registration table 110, first, (a) the PBX interface unit 101 and the PBX 11 Notify to fall back to communication speed below voice band.

(B) Voice / FAX switching section 104, 1
05 is switched to the FAX modem unit 107.

(C) Notify the band management unit 110 and send a fax
The station number and extension number are automatically registered in the terminal registration table 111.

FIG. 3 is a flowchart for explaining the operation of one embodiment of the present invention. The operation of one embodiment of the present invention will be described with reference to FIG. Figure 3 is mainly
FIG. 3 is a flowchart illustrating processing in the bandwidth management protocol unit 106 of FIG.

The transmitting-side multimedia communication device 1 has a PB
The connection destination dial number is received from X11 (step 201).

The dial number is extracted and the station number and extension number are analyzed (step 202).

The FAX terminal 3 is added to the extracted connection destination station number.
2 determines whether or not it is accommodated (step 20).
3). If it is determined in step 203 that the FAX terminal is not registered in the registration table for the station,
The call is regarded as voice communication, and a voice communication flag is set (step 206), and then the bandwidth is adjusted (step 210).

On the other hand, if it is determined in step 203 that a fax is registered in the station, the extension number is extracted, and it is determined whether or not the fax number is accommodated in the extension number. (Step 204).

If it is determined in step 204 that the terminal is not a facsimile terminal as in the case of the station number, it is determined that the terminal is a voice communication, a voice communication flag is set (step 206), and then band adjustment is performed (step 210).

If it is determined in step 204 that the connection destination is a facsimile terminal (step 205),
It is determined whether or not a band capable of accommodating the X terminal can be secured (step 207). If the band cannot be secured, a busy is returned to the PBX side (step 211). A necessary band is set by facsimile (step 208), and a call signal is transmitted to the next station (step 209).

FIG. 4 is a flowchart showing a registration process of a destination FAX terminal number in one embodiment of the present invention. With reference to FIG. 4, the operation of one embodiment of the present invention will be described below.

After receiving a switching signal from voice communication to FAX communication (step 301), step 20 in FIG.
It is determined whether or not the voice communication flag set in step 6 is ON (step 302). If it is ON, the station number accommodating the FAX terminal and the extension number of the FAX terminal are stored in the FAX terminal registration table 105. Register (Step 30)
3).

[0045]

As described above, according to the present invention, the following effects can be obtained.

(1) The first effect of the present invention is that in a multimedia communication apparatus capable of performing integrated communication of voice and data while adjusting the securing of a band, a FAX rather than a voice band is used.
Even when the bandwidth is larger, FAX communication can be performed without causing a failure such as disconnection of communication.
That's what it means.

The reason is that, in the present invention, by registering the terminal type such as telephone / fax in advance,
This is because, at the stage of adjusting the bandwidth, a bandwidth suitable for the terminal can be secured.

(2) The second effect of the present invention is that
Call / fax all multimedia communication devices in advance
This eliminates the need to register terminal types such as commands from the configuration terminal using commands.

The reason is that, in the present invention, even when the FAX is not registered in the terminal type, the FAX terminal registration table is automatically updated and registered when the FAX terminal communication is recognized. It is because it is configured to be able to.

[Brief description of the drawings]

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

FIG. 2 is a block diagram illustrating a configuration of a multimedia communication device according to an embodiment of the present invention.

FIG. 3 is a flowchart illustrating an operation of a bandwidth management protocol unit according to an embodiment of the present invention.

FIG. 4 is a flowchart illustrating an operation of a destination FAX terminal number registration process according to an embodiment of the present invention.

[Explanation of symbols]

 1-4 Multimedia communication device 11-13 PBX 21-23 Telephone 31-33 FAX terminal 41-43 Serial terminal 51-57 Ethernet (Ethernet) terminal 61 Router 101 PBX interface unit 102 Signaling detection unit 103 FAX detection unit 104, 105 Voice / FAX switching section 106 Codec section 107 FAX modem section 108 Protocol processing section 109 Call processing section 110 Band management section 111 FAX number registration table 112 Frame transmission / reception processing section 201 Connection destination dial number reception processing 202 Station number / extension number analysis processing 203 FAX terminal determination processing by station number 204 FAX terminal determination processing by extension number 205 FAX terminal correspondence processing 206 Voice communication flag processing 207 FAX communication band presence / absence determination processing 208 F X band adjustment process 209 calling signal transmitting process 210 voice band adjustment process 211 Busy response processing 301 voice / FAX switching signal reception processing 302 voice communication flag ON / OFF determination process 303 FAX terminal number registration process

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI H04M 3/00 H04N 1/32 Z H04N 1/00 7/10 1/32 H04L 11/20 102C 7/10 13/00 307C ( 72) Inventor Masako Tobita, 7-1-1 Shiba, Minato-ku, Tokyo NEC Corporation (72) Inventor Toshihiko Takamatsu 5-7-1, Shiba 5-chome, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Fumihide Niimura 5-7-1 Shiba, Minato-ku, Tokyo Within NEC Corporation (72) Inventor Yasuhiro Suzuki 5-7-1 Shiba, Minato-ku, Tokyo Inside NEC Corporation (72) Inventor Yukio Mitani Inside NEC Corporation 5-7-1 Shiba, Minato-ku, Tokyo

Claims (2)

[Claims] A multimedia communication apparatus capable of integrated communication of voice and data, and means for adjusting a communication band between a transmitting station, a receiving station, and each of the relay stations in a network constituted by these apparatuses. Means for automatically detecting switching from voice communication to facsimile communication; fallback means for requesting the facsimile terminal to reduce the communication speed; and holding a facsimile terminal registration table in the multimedia communication device, and from the PBX. Means for analyzing the received dial number and searching for a facsimile terminal; and means for automatically registering the facsimile terminal in the facsimile terminal registration table when the destination is recognized as a facsimile terminal. Are different,
A bandwidth management method for a multimedia router, which secures the required minimum bandwidth and communicates. 2. A network comprising a multimedia communication device capable of integrated communication of voice and data, comprising means for adjusting a communication band between a transmitting station, a receiving station, and a device of each of the relaying stations. Further, the multimedia communication device includes means for automatically detecting switching from voice communication to FAX communication, fallback means for requesting the FAX terminal to reduce the communication speed, and a station number of a PBX accommodating a telephone or a FAX terminal. And a table in which the extension numbers of the FAX terminals accommodated therein are registered, and a telephone number and an extension number are analyzed from the connection destination dial number received from the PBX, and the table is searched to determine whether or not the connection destination is the FAX terminal. Judging means, when the transmission destination is recognized as a facsimile terminal, and when the transmission destination is not registered in the facsimile terminal registration table, Means for automatically registering an office number and an extension number in the facsimile terminal registration table; and securing and communicating at least a minimum band necessary when a voice communication band and a facsimile communication band are different. A bandwidth management method in a multimedia router characterized by the following.