KR100186411B1 - Contact method of paging system using serial port of keyphone - Google Patents

Abstract

The present invention relates to a method for accessing an premises paging system using a serial port of a keyphone. In particular, the keyphone system uses a serial port of a keyphone for interworking by transmitting a predefined protocol to a premises paging system through a serial port (RS 232C). It relates to a method of connecting the paging system in the premises. Therefore, in the present invention, since the paging system interlocks using the serial port (RS 232C), the predefined code is transmitted to the serial port to enable real-time service, thereby increasing the response speed, and keying all codes dialed by the user. The processing speed is faster because the processing speed is less than 1 second, and the paging system is converted to the on hook state after receiving the end code, improving the processing speed, and operating without a general telephone connection board. As a result, cost is reduced, and capacity is increased because there is no reduction in the number of available extension ports of the entire keyphone system.

Description

How to access paging system in the premises using the serial port of key phone

1 is a signal flow diagram of a typical paging system.

Figure 2 is a block diagram of the paging system access device using the serial port of the key phone of the present invention.

3 is a signal flow diagram for FIG.

* Explanation of symbols for main parts of the drawings

10: key exchanger 20: paging system

30: phaser

The present invention relates to a method for accessing an premises paging system using a serial port of a keyphone. In particular, the keyphone system uses a serial port of a keyphone for interworking by transmitting a predefined protocol to a premises paging system through a serial port (RS 232C). It relates to a method of connecting the paging system in the premises.

The general premises paging system is connected to the general telephone connection board of the key switchboard, the signaling method is the same as the general telephone signal system, and when calling the paging system, the key phone system supplies the ring signal like the general telephone, and the key phone In response, the system transmits the pager number and its extension number to DTMF (Dual Tone Multi Frequency).

FIG. 1 is a signal flow diagram of a general paging system, as shown here, where an extension subscriber dials an extension number connected to a paging system through a keyphone exchange to make a pager call, so that the keyphone system rings the paging system. A step of supplying a signal to inform the call signal (S1-S2), and a paging system that detects a ring signal through the keyphone system sends a response signal to the keyphone system and then sends a DTMF signal of the keyphone system. After that, the extension subscriber dials the number of the pager to be called through the key phone system (S3-S4), and the paging system receiving the pager number to be called transmits a confirmation tone to the subscriber. Receiving the confirmation tone, the extension subscriber dials his own extension number and then hooking the handset (S5-S7), since the paging system detects an error tone to be transmitted from the key phone, and a step (S8) of the hook on the paging system.

In such a general paging system, the keyphone exchanger interlocks the premises paging system using a general telephone port. Therefore, it takes about 1 second to recognize the ring signal in the paging system, and dials all the cords in the extension. The port is occupied until it is occupied and cannot be used on another station. The occupancy time is longer than 10 seconds, and even if the calling station is on hook, the paging system receives the error tone provided by the keyphone to go on hook. Since additional time is required to be detected and connected to a general telephone circuit, a general telephone connection board must be purchased, and the total number of available extension ports of the keyphone system is reduced by the number of extension ports used for premises paging.

Accordingly, an object of the present invention is to dial a premises paging call code defined by an extension subscriber, and then dial a pager number and his extension number, wherein the key phone system stores the input code in a memory, and the extension subscriber is on hook. When the code is transmitted to the paging system through a serial port (RS 232C) to provide a paging system access method using the serial port of the keyphone, which will be described in detail with reference to the accompanying drawings.

FIG. 2 is a block diagram of a premises paging system access device using a serial port of a key phone according to the present invention. As shown in the drawing, when an extension subscriber inputs an premises pager call code, pager number, and caller extension number to make a pager call, Keyphone switch 10 for transmitting call information through serial port (RS 232C) when the subscriber is on-hook after storing in the memory, and the call information of the key phone switch 10 to the serial port (RS 232C). Received through the paging system 20 to call the pager, and through the paging system 20 consists of a pager 30 to receive the call of the extension subscriber.

FIG. 3 is a signal flow diagram of FIG. 2, wherein the station subscriber dials the pager calling code in the premises, dials the pager number to be called, dials the extension number of the caller, and hooks it on ( S1-S4), after the extension subscriber is on-hook, the key phone system transmits the stored code and the termination code to the paging system through the serial port (RS 232C), and the paging system receives the termination code and switches to the on-hook state. It consists of the steps (S5-S6), the operation process thereof will be described in detail as follows.

When an extension subscriber presses a dial or corresponding multi-purpose button by defining an extension paging call code, the keyphone system recognizes that the extension subscriber is attempting an in-house paging call and stores all the numbers entered in the internal memory. When the extension subscriber hooks on, the inputted sequence of numbers is sent to the serial port, and when the caller's number is the same as the extension number currently being used, the subscriber dials the extension number and then hooks on. In this case, the key phone system automatically transmits the current extension number to the serial port.

As described in detail above, the present invention uses the serial port (RS 232C) to interwork with the premises paging system to transmit a predefined code to the serial port to enable real-time service, the response speed is faster, the user dials All codes are stored in the keyphone system and transmitted at the moment of on-hook, so the processing speed is less than 1 second, and the processing speed is faster.The paging system is converted to on-hook state after receiving the end code, and the processing speed is improved. It saves money by operating without a connection board, and there is no reduction in the number of extension ports available for the entire keyphone system.

Claims (1)

The extension subscriber dials the premises pager calling code, dials the pager number to be called, dials the extension number of the caller, and hooks on. After the extension is hooked on by the subscriber, the key phone system serializes the stored code and the end code. The paging system is connected to the paging system via a port (RS 232C), and the paging system is connected to the paging system in the premises using the serial port of the key phone, characterized in that the step of switching to the on-hook state.