JPS63199552A - Communication equipment - Google Patents

Abstract

PURPOSE:To improve the operability of an equipment by discriminating the state of respective communication channel by a discriminating means, and indicating the working condition of a line by a indicating means based on a discriminated result. CONSTITUTION:When a calling and an incoming occur, a signal sequence confirms whether the calling uses a channel B. If the calling is the one which does not use the channel B, it comes to be Idle state. If the calling is the one which uses the channel B, it decides which channel B is to be used. For instance, in the case that only the channel B1 is used, it lights a B1 lamp 24. Thus, by providing a digital telephone system for an ISDN with an indicating function to indicate the working condition of the channel B of the line, which the system is connected to, by a lamp, an operator can easily confirm the presence of the vacancy of the line when he intends to call.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a communication device connected to a communication line having a plurality of communication channels.

[Prior art]

Traditionally, ISDN (Integ.
rated 5 services @Digital
Network) is known, and this l5
The DN line has 2 B channels as data channels,
There is one D channel as a control channel. This l5
In a DN communication system, up to eight terminals are connected to a line.

[Problems with conventional technology]

In the above-mentioned l5DN, when a terminal attempts to communicate because it uses three communication channels up to eight, it is difficult for the user to know whether or not the communication channel is free until the actual communication operation is performed. has the disadvantage that it is very difficult to use.

[Means and actions for solving problems]

In the present invention, the operability of the apparatus can be improved by determining the state of each communication channel by the determining means and displaying the usage status of the line by the display means based on the determination result.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings. In the following embodiments, a communication device connected to an ISDN line will be explained as an example.

1 to 5 are diagrams for explaining this embodiment, and FIG. 1 is a connection diagram in which the communication device of this embodiment is connected to the 15DN network. 1 is a network termination device which is a network termination; 2 is a bus line connecting the network termination device 1 and a plurality of terminal devices; 3 is a subscriber line connecting the 15DN exchange and the network termination device 1; 4,8.10.11
5.9 is a digital facsimile device, 6 is a telex device, and 7 is a digital phone according to this embodiment. FIG. 2 is an external view of the digital telephone of this embodiment. 21 is the digital phone body,
22 is a handset, 23 is a key button for inputting a telephone number, etc., and 24 is a lamp for displaying information on the B channel in use.

FIG. 3 is a block diagram showing the configuration of this embodiment.

The above embodiment is composed of a digital telephone main body 31 and a handset 40 which is a telephone transmitter and receiver. The digital telephone body 31 has a CPU 32 and a ROM 3.
3, RAM 34, communication chip 37, I10 controller 35, and codec 36 that performs analog/digital conversion.
It has a key butt 38 and a lamp 39. The CPU 2 is a central processing unit that controls the inside of the digital telephone body 1, the ROM 33 is a memory that stores a control program according to the flowchart shown in FIG.
34 is a memory that stores communication data.

FIG. 4 is a diagram showing a signal sequence of a digital telephone in the 15DN network. In the called terminal B in FIG. 4, 51 is a call request command (SETUP), 52
is the calling command (ALERT), 53 is the response command (CONN), and 54 is the connection completion command (CONN).
N ACK), 55 is call data (B-CH double signal,
56 is a disconnection instruction command (Disc), 57 is a recovery request command (REL), and 58 is a recovery confirmation command (RE).
L COM).

Next, the operation of the above embodiment will be explained.

FIG. 5 is a flowchart showing the operation of the above embodiment.

First, in Sl, if a terminal connected to the same subscriber line as the own terminal made a call by the 5ETUP command in Figure 4, 51, received a call by receiving the 5ETUP command, or disconnected by the 8RELCOM command in Figure 4. monitor what has been done.

When there is an outgoing call and an incoming call, it is checked in S2 whether the call uses the B channel or not using a signal sequence. If the call does not use the B channel, the call enters the Idle state of S8.

If the call uses a B channel, it is determined in S3 which B channel to use. If only the B1 channel is used, the B1 channel lamp 24 in FIG. 2 is turned on in S4.

If only B2 channel is used in S3, B2 channel is used in S5.
Turn on the channel lamp 24 (Figure 2).

S6 when using both Bl and B2 channels in S3
B1 channel in S7, 82 channel lamp in Figure 2 24
Light up both.

S4. S5. After processing S7, the digital telephone according to the present invention enters the Idle state of S8.

If disconnection is detected in Sl, it is determined in S9 whether the call was using the B channel. If the B channel is not used, the state is in the idle state of S8. B
If a channel is being used, it is determined in S10 which B channel was being used. If only the B1 channel is used, the B1 channel lamp (FIG. 2) is turned off at Sll.

If only B2 channel was used in S10, S1
2 turns off the B2 channel lamp in FIG. 2.

If both the Bl and B2 channels are used in S10, the B2 channel lamp is turned off in S13, and the B2 channel lamp in FIG. 2 is turned off in S14.

Sll, S12. After processing S14, the digital telephone according to the present invention enters the Idle state of S8.

In the above embodiment, the B channel in use was displayed by a lamp, but it may also be displayed by characters using an LCD or the like.

As explained above, the L5DN digital telephone device is equipped with a function that uses a lamp to display the B channel usage status of the line to which the device is connected, allowing the operator to check whether the line is free when making a call. This can be easily confirmed.

〔effect〕

As described above, according to the present invention, the usage status of each communication channel can be known, and the operability of the device can be improved.

[Brief explanation of the drawing]

FIG. 1 is a connection diagram of this embodiment connected to an 15DN network, and FIG. 2 is an external view of the digital telephone of this embodiment. Third
The figure is a block diagram showing the configuration of this embodiment, and FIG. 4 is a 15D
FIG. 5, which is a diagram showing a signal sequence of a digital telephone in the N network, is a flowchart for explaining the operation of the embodiment shown in FIGS. 1 to 3. 31 is a digital telephone body, 32 is a central processing unit, 33
is ROM, 34 is RAM, 35 is I10 controller,
36 is a codec, 37 is a communication chip, 38 is a keypad, 39 is a push-button lamp, 40 is a handset,
41 is a bus line. 4th figure

Claims (1)

[Claims] In a communication device connected to a communication line having a plurality of communication channels, means for determining the state of each communication channel, and displaying the line usage status based on the determination result by the determination means. A communication device comprising a display means.