JPH0195655A - Handy terminal equipment - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a portable terminal device incorporating an NCU and a modem and transmitting and receiving data to and from a partner station via a telephone line.

[Prior Art] In a conventional portable terminal device that has a built-in NCU and a modem and sends and receives data to and from a partner station via a telephone line, when the telephone line is linked by an incoming call, a ringing signal (ringer signal) is detected. After that, off-hook control (control to close the DC circuit) must be performed.The calling signal repeats a low level for about 1 second and a high level for about 2 seconds. In order to detect it correctly, it is necessary to measure the above repetition at least 2.3 times using a timer etc. Therefore, for a period of 3 to 6 seconds or more,
It is normal to go off-hook after confirming detection by ringing a bell in synchronization with the ringing signal.

Furthermore, in the case of a portable terminal device with a simple structure that can be powered on by a call signal, the power-on sequence includes checking and initializing various devices immediately after the power is turned on.

[Internal Problems to be Solved by the Invention] In the above embodiment, it takes time to go off-hook after confirming the detection of the ringing signal while ringing the bell in synchronization with the ringing signal for 3 to 6 seconds or more. Furthermore, since it takes a long time to perform various checks and initializations after turning on the power, there is a problem in that it takes a long time to establish a line link after receiving a call.

[Means for Solving the Problems] The present invention determines whether the hardware is turned on by the power-on switch or whether the hardware is activated by the arrival of the calling signal from the line, based on the level of the calling signal at power-on. This is to determine whether the

[Operation] The present invention determines whether the hardware has been started up by the power-on switch or by the arrival of the calling signal from the line, based on the level of the calling signal at power-on. Therefore, when linking lines and transferring data by automatic incoming calls,
Processing efficiency is improved because detection of a ringing signal is no longer necessary and one line connection is instantaneously established.

Embodiment J FIG. 1 is a block diagram showing a portable terminal device according to an embodiment of the present invention.

This embodiment includes a CPU that controls the entire device, a ROM 3 that stores programs for the operations shown in FIGS. 2 and 3, a RAM 4 that stores image information and a modem flag described later, a display device 5, and an input device. a device 6, a printing device 7, and a gate array 8 that outputs the status of a ringing signal in the case of an incoming call.
, an NCU (network control unit) for linking lines, a modem 9, a power supply circuit 0, a pulse generation circuit 21 necessary for dialing, and a circuit 22 for generating dual tones. Further, a telephone line ti is connected to the NCU and modem 9.

Also.

In addition, the CPUI is a determining means for determining whether the hardware was started up by the power-on switch or by receiving the calling signal from the line, based on the level of the calling signal at power-on. This is an example.

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

FIG. 2 is a flowchart showing the operation from when the power is turned on until jumping to the user program in the above embodiment.

First, when the power is turned on, a wait and ROM check are performed (si) to determine whether the ringing signal is active or inactive (S2), and if the ringing signal is active, the modem flag is turned on (S3), and the ringing signal is activated. If the signal is inactive, turn off the modem flag (34)
, and performs RAM check, device check, initialization, etc. (35), and jumps to the user program.

Here, in the case of a portable terminal device, there are two reasons for turning on the power: pressing a power-on switch or receiving a call signal. When a call signal is received, that is, the call signal falls, and the program stored in ROM3 starts running, the call signal goes low.
(LOW active) continues for 1 second, checks the ROM3 for several 101 seconds while taking into account the noise at the falling edge of the ringing signal, and after this has elapsed, if the ringing signal is detected once or several times in a row, the ringing signal It can be determined that the power has been turned on. This is because the power is not turned on unless the ringing signal is stable, so the ringing signal L
This is because OW lasts for one second.

FIG. 3 is a flowchart showing the operation after jumping to the user program in the above embodiment.

When jumping to the user program, the first line control handler is called (S11), and it is determined whether the modem flag is on or off (S12).If the modem flag is off, the power is turned on by turning on the power switch. The application is started using the power-on switch (S13).

On the other hand, if the modem flag is on, it means that the power was turned on due to the arrival of a call signal, and the modem power supply 10 is turned on, off-hook, and switched from telephone mode to modem mode (S14), and if there is data transfer. (S15)
, determine check data transfer (S16),
If the check data transfer is OK, data transfer by the application is started (S17), and if the check data transfer is NG, error handling is performed (51).
9) Since it is a wrong call, turn off the power supply circuit IO.

If there is no data transfer in S15, the device waits for a predetermined time (318), and when the predetermined time elapses, error processing is performed and the power is turned off.

When the power-on sequence is completed and the line control handler is called from the user program, off-hook can be executed immediately since the presence or absence of a call signal at power-on is stored as a modem flag.

This shortens the time it takes to establish a link after receiving a call. When the modem is powered on and the line is linked, the handler switches from telephone mode to modem mode and waits to receive data.

FIG. 4 is a block diagram showing another embodiment of the invention.

In this embodiment, in addition to the CPU, a device controller (CPU) 12 is provided to control other devices, and this device controller 12 controls a bell ringer 13.

In this case, since the CPU 1 receives the line link data, the telephone bell can ring in synchronization with the calling signal. By ringing the bell, it is possible to carry out processing while informing the surrounding people of the occurrence of an incoming call.

In other words, the present invention provides O3 in charge of the reset sequence.
(operating system) determines the power-on level of the call signal. In other words, the O5 determines whether the hardware was started up by the power-on switch or by receiving a calling signal from the line, based on the level of the calling signal when the power was turned on. When the handler program that links receives that information,
Eliminates the need to detect a ringing signal. Furthermore, the process of waiting for a call, connecting the line, transferring data, and turning off the power can be unmanned, and power consumption can be saved because the portable terminal device is normally powered off.

[Effects of the Invention] According to the present invention, when data is transferred by linking lines by automatic call reception, the lines are connected immediately, so that processing efficiency is improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the present invention. FIG. 2 is a flowchart showing the operation from power-on to jumping to the user program in the above embodiment. FIG. 3 is a flowchart showing the operation after jumping to the user program in the above embodiment. FIG. 4 is a block diagram showing another embodiment of the invention. 1...CPU. 3...ROM, 4...RAM, 8...gate array, 9...NCU, modem, 10...power supply circuit, IT...telephone circuit. Patent applicant Canon Co., Ltd. Agent Arata Yokubo - Figure 1

Claims (1)

[Claims] In a portable terminal device that has a built-in modem and transmits and receives data via a telephone line, the power-on switch determines whether the hardware is turned on based on the power-on level of the calling signal, or whether the line 1. A portable terminal device that determines whether the hardware has started up based on the receipt of a call signal from the terminal device.