JPH0350950A - Communication terminal equipment - Google Patents

Abstract

PURPOSE:To attain reorigination with a simple key operation and simultaneously to ensure the connection to an opposite party by providing a radial key to the operation section and deleting the subaddress and dialing a destination dialed precedingly through the depression of the radial key. CONSTITUTION:When a facsimile signal is sent by the G4 FAX to a same destination number in the case of connecting thereto by a phone call already, the user sets a picture to be sent to a scanner 12 and sets the line selection mode to the G4 by using the key pad 10 of an operation section 8 and depresses a radial key. A terminal equipment loads a destination number stored in a RAM 3 at the preceding dialing when the redial key is depressed to check the hook state of a handset and the line selection state and the subaddress HLC(high order layer matching) is switched accordingly. That is, it is possible for the user to delete the subaddress and call the destination dialed precedingly with the depression of the redial key, then recalling is attained with a simple key operation and the connection to the opposite party is ensured because of the absence of the subaddress.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a communication terminal device that can be connected to an ISDN network.

[Prior art] In an ISDN network, one line has two data channels (B-Channel) and one control channel (B-Channel).
D-Channel), and the line calling process is D-Channel).
- Performed using Channelcl. Therefore B-(
:hanncl During communication via one D-Chan
If you connect a new call using ncl, you will have 1 tree of B-C.
Since communication is enabled with hanncl, two communications can be performed at the same time.

[Problem to be Solved by the Invention] When setting up a new call, the D-channel is used to perform the necessary steps to connect the line. (Fig. 4) However, if one B-channel is already connected and you want to connect another B-channel to the other party, or if you disconnect the B-channel and then connect the same B-channel again. If you want to connect to a destination, you have to perform the connection procedure again even though the destination number (destination address) is the same, but in this case, the user must enter the destination number and the sub-address that can be set for each terminal. I had to enter it again, which was very tedious.

[Means and effects for solving the problem] The present invention provides a function to memorize the number of the last called party, so that the user can make a call again to the memorized destination by pressing a predetermined key. However, in order to ensure connection to the other party, the subaddress of the other party is deleted before the call is placed.

[Example] Figures 1 to 4 show examples of the present invention. FIG. 1 is a block diagram showing the configuration of this embodiment. In Figure 1,
1 is the central control unit (CPU), 2 is the ROM, 3 is the RAM, 4, 5.6 is I1
0 controller, 7 communication control section, 8 operation section, 9 display section, IO key button 211 handset, 12
is an image reading section (scanner).

FIGS. 2 and 3 are flowcharts showing the operation of this embodiment.

FIG. 4 is a sequence diagram showing D-channel call control.

As an embodiment of the present invention, consider a case where a G 4 FAX is sent to the same destination number when the user is connected to a certain destination by telephone.

The terminal side always detects keystrokes (21), but when a dial is entered, it stores it in RAM3 (21).
3) Then, when the start key is pressed (25), if it is handset 11 or off-hook, it will make a call as a telephone.
(27) The call control procedure is as shown in FIG.

Now, a case is shown in which a call is made from terminal A to terminal B.

First, terminal A issues a 5ETup command to B (4
1). 5ETup command (41) includes the destination number of terminal B (destination address) and the terminal with the destination number (up to 8 can be connected)
5 sets of sub-addresses, HLC (higher layer consistency), LLC (lower layer consistency), etc. that can be set for each
5etup message is carried, and terminal B, which is the called side, performs a consistency check to see whether or not it accepts the 5etup message. If the reception is accepted, C0NN (42) is output, the B-channel is connected, and communication begins.

Next, send the facsimile image using 04 to the same party. As usual, the terminal is always performing key sensor (31)
Alternatively, the user sets the transmitted image on the scanner 12, sets the line selection to 04 using the key 10 on the operation unit 8, and presses the re-call key. When the terminal presses the re-call key (32
) Load the destination number stored in memory during the previous call (33). Next, the hook status of the handset (34)
, check line selection form 1 (35) and select H accordingly.
Switch LC.

We will talk about subaddresses here, but as mentioned above, I
Up to eight terminals can be connected to the HAS line of the SDN network, and the subaddress of each terminal can be set arbitrarily. If a subaddress is specified, the called party will issue a connection refusal if the terminal with the specified subaddress cannot be used. The same applies when the subaddresses do not match. In other words, it is considered that the subaddresses are naturally different when connecting as a station for the first time as in this embodiment and when connecting to G4FaX. Therefore, when the re-call key is pressed, the terminal sends 5 etup without carrying sub-address information to avoid disconnection caused by sub-address mismatch.
Issue a command. At this point, repeat the sequence shown in FIG. 4 to connect the B-channel of another tree.

[Other Embodiments] The present invention can be applied not only to manual re-calling but also to automatic re-calling. When a call is made to a certain destination but the connection cannot be established, the calling party calls again after a certain period of time has elapsed. At that time, remove the subaddress and call again to ensure connection.

[Effects of the Invention] As explained above, by adding a function to obtain a subaddress and make a call to the destination to which a previous call was made by pressing a predetermined key, 1. It is possible to make a call again with a simple key operation.

2. Since there is no subaddress, connection to the other party is reliable. It is possible to provide a communication terminal with this effect.

[Brief Description of the Drawings] Figure 1 is a block diagram showing the configuration of the terminal device of this embodiment, Figure 2 is a flowchart for storing the destination number to call, and Figure 3 is a diagram showing the implementation of this embodiment. FIG. 4 is a D-channel call control sequence diagram. l...Central control unit 2...ROM 3...RAM 4.5.6...I10 Controller 7...Communication control unit 8...Operation panel 9...Display unit 10...Keypad 11...Handset 12-...Image reading section

Claims (1)

[Claims] A communication terminal device connected to an ISDN network is characterized in that by pressing a predetermined key on an operation panel of the communication terminal device, a subaddress of the destination to which the last call was made is removed and a re-call operation is performed.