JPS62216598A - Key telephone system - Google Patents

Abstract

PURPOSE:To identify the incoming to a line with a polarity inversion and a line without the polarity inversion by detecting the presence and absence of the polarity inversion, and ringing the first incoming sound for the incoming to the line with the polarity inversion and the second incoming sound of the frequency different from this for the incoming to the line without the polarity inversion with a key telephone set. CONSTITUTION:When an incoming to a trunk line Li with the polarity inversion is detected by an incoming detecting circuit 20i, simultaneously, the polarity inversion is detected by a polarity inversion detecting circuit 21i, a control circuit 51 controls an incoming sound selecting circuit 52 by an incoming detecting signal and a polarity inversion presence detecting signal and selects the incoming sound source 41 of a channel switch part 4. When the incoming to a trunk line Lj without the polarity inversion is detected by an incoming detecting circuit 20j, simultaneously, the presence and absence of the polarity inversion are detected by a polarity inversion detecting circuit 21j, by the incoming detecting signal and a polarity inversion absence detecting signal, the control circuit 51 controls the incoming sound selecting circuit 52, and selects an incoming sound source 42 of the frequency different from the incoming sound source 41 of the channel switch part 4. The selected incoming sounds are sent through the channel switch part 4 and a telephone set interface part 3 to key telephone sets T1-Tl.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a button telephone device, and particularly to a button telephone device in which a line with polarity reversal and a line without polarity reversal are housed in a mixed manner in the central office line interface section. There are things related to equipment.

[Conventional technology]

Conventionally, in this type of key telephone device, if a ring tone is set in advance for each type of central office line that can be accommodated in the central office line interface section based on system data, etc., it is difficult to receive a call to a line with polarity reversal and to receive a call on a line with polarity reversal. The system is configured so that an incoming call to a line without a call can be identified by the incoming IJ sound.

[Problem that the invention seeks to solve]

The above-mentioned conventional button telephone is configured as described above, so if there is no ringtone setting for each of the above-mentioned office line types based on system data, etc., the polarity reversal that is accommodated in the office line interface section is used. There was a problem in that it was not possible to identify incoming calls to a line with a polarity reversal and incoming calls to a line without polarity reversal by the M1 sound.

[Means for solving problems]

The button telephone device according to the present invention includes a telephone interface section that accommodates connection lines of a button telephone, a central office line interface section that accommodates a plurality of lines with polarity reversal and lines without polarity reversal, and a central office line interface section that accommodates a plurality of lines with polarity reversal and lines without polarity reversal. the central office line interface section; a control circuit section that controls the telephone interface section, the central office line interface section, and the central office line switch section; an incoming call detection means and a polarity reversal detection means; the call path switch unit includes a first incoming call sound source and a second incoming call sound source having a frequency different from the first incoming sound source; Ringing tone selection means for selecting a first ringing sound source and a second ringing sound source, and when an incoming call to the central office line interface section is detected by the incoming call detection means and the polarity reversal detecting means, and when polarity reversal is detected, the ringing tone a first control means for selecting a first ringing sound source of the call path switch section by a selection means and transmitting a ringing sound from the first ringing sound source to a button telephone connected to the telephone interface section; When the height detection and polarity reversal detection means detects an incoming call to the central office line interface section and no polarity reversal is detected, the ring tone selection means selects the second ring tone source of the call path switch section, and the telephone interface section The button telephone connected to the telephone is equipped with a second control means for transmitting a ring tone from the 271st ring tone source.

[Operation] In the present invention, by detecting the presence or absence of polarity reversal, the ring tone from the first ringing sound source is used for incoming calls to a line with polarity reversal, and the above-mentioned ring tone is used for incoming calls to a line without polarity reversal. 1
4 mute sounds from a second ringing sound source having a frequency different from that of the ringing sound source are sounded by a key telephone, and incoming calls to a line with polarity reversal and a line without polarity reversal are distinguished by these 4 tones.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

The figure is a block diagram showing one embodiment of this firing.

In the figure, 1 is a main device, and this main device 1 includes a central office line interface section 2 that accommodates a mixture of lines with polarity reversal and lines without polarity reversal, and a key telephone T1.
．． A telephone interface unit 3 that accommodates connection lines of T2...Tl, a call path switch unit 4 that connects the line with polarity reversal and the line without polarity reversal,
It includes a control circuit section 5 that controls the office line interface section 2, the telephone interface section 3, and the communication path switch section 4.

The central office line interface unit 2 includes incoming call detection circuits 20□, 20□, .
, 21□・′...21n, and response detection circuits 220, 22
□...22n and DC closing circuit 23□, 232.
.

The control circuit unit 5 includes a control circuit 51 and a ring tone selection circuit 52. When an incoming call to the central office line interface unit 2 is detected and polarity reversal is detected, the control circuit 51 operates as a ring tone selection circuit. control means for selecting the ring tone source 41 of the call path switch section 4 by means of 52 and transmitting the ring tone from the ring tone source 51 to the button telephone connected to the telephone interface section 3; is detected and the polarity reversal cannot be detected, the ring tone selection circuit 52 selects a ring tone source 42 of a frequency different from the ring tone source 41 of the communication path switch section 4.
The ring tone selection circuit 52 constitutes a control means that selects a ring tone from the ring tone source 52 and sends a ring tone from the ring tone source 52 to the button telephone connected to the telephone interface section 3. The ring tone selection means for selecting the ring tone source 41 and the ring tone source 42 is constituted.

In addition, the main unit of the button telephone device shown in this figure [1 is "n"]
Accommodates lines with polarity reversal (office line) and lines without polarity reversal (office line) Ll, L,...Ln, and
1-t'' button telephones T, T2, . . . Tj are accommodated. And station ff! AL1 to Ln are connected to the communication path switch section 4 via the office line interface section 2,
Further, the key telephones T1 to T71 have voice lines connected to a call path switch section 4 and data lines connected to a control circuit section 5 via a telephone interface section 3, respectively.

Next, the operation of the smiley foil example shown in this figure will be explained.

First, when the incoming call detection circuit 20i detects an a1 signal to a central office line Li with polarity inversion (not shown) housed in the central office line interface section 2, 1. At the same time, the presence or absence of polarity reversal is detected by the polarity reversal detection circuit 21i. In this case, since the polarity reversal detection circuit 211 detects the polarity reversal, the incoming call detection signal and the polarity reversal detection signal are input to the control circuit 51. Based on this input detection signal, the control circuit 51 controls the ring tone selection circuit 52 to select the ring tone source 41 of the call path switch section 4, and the ring tone from this ring tone source 41 is transmitted to the call path switch section 4 and the ring tone selection circuit 52. The button telephone T1 via the telephone interface section 3
~T! 1, which causes the key telephones T1 to Tl to emit this ringtone.When this incoming call is answered by the button telephone Ti (not shown), the incoming call is controlled (routed) via the packing machine interface section 3. ) By forming a DC loop in the DC connection circuit 231 of the office line interface section 2 of the office line Lt where the incoming call is delayed through the line 51, the incoming call from the office line L1 can be answered and a conversation can be made.

Next, when the incoming call detection circuit 20j detects an incoming call to the office line Lj (not shown) without polarity reversal, the polarity reversal detection circuit 21j simultaneously detects the presence or absence of polarity reversal. In this case, since polarity reversal is not detected, the incoming call detection signal and the polarity reversal non-detection signal are input to the control circuit 51.

Based on this input detection signal, the control circuit 51 controls the ring tone selection circuit 52 to select a ring tone source 42 having a different frequency from the ring tone source 41 of the communication path switch section 4 . The ring tone from this ring tone source 42 is sent to the key telephones T1 to Tj via the call path switch section 4 and the telephone interface section 3, and is transmitted to the key telephones T1 to T1.
Then this ringtone will sound.

When this incoming call is answered by a button telephone Tj (not shown), the control circuit 51 connects the direct current connection circuit 23j of the central office line interface section 2 of the central office line Lj to which the incoming call is received by the control circuit 51 via the anti-clogging machine interface section 3. By forming a DC loop at the station, it is possible to respond to an incoming call from the central office line Lj and make a telephone conversation.

〔Effect of the invention〕

As explained above, according to the present invention, by detecting the presence or absence of polarity reversal, without setting a ring tone for each line type using system data etc., a call to a line with polarity reversal can be made. To do this, a ringtone from the first ringing sound source is played, and when the line does not have polarity reversal, a ringing sound is played from a second ringing sound source with a frequency different from that of the first ringing sound source. Since it is possible to distinguish between a line with polarity reversal and a line without polarity reversal by the ring tone, the practical effect is extremely large.

[Brief explanation of drawings]

The figure is a block diagram showing one embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Main device, 2... Office line interface section, 3... Telephone interface section, 4... Call path switch section, 5... Control circuit section, 20, ~20
n...Incoming call detection circuit, 21, ~21tl...Polarity reversal detection circuit, 41.42...Incoming call sound source, 51.
...Control circuit, 52...Ring tone selection circuit, L1~
Ln...office line, T1-Tl...button telephone.

Claims (1)

[Claims] a telephone interface section that accommodates a connection line for a button telephone; a central office line interface section that accommodates a mixture of lines with polarity reversal and lines without polarity reversal;
A button telephone comprising: a call path switch unit that connects the line with polarity reversal and the line without polarity reversal; and a control circuit unit that controls the telephone interface unit, the office line interface unit, and the call path switch unit. In the apparatus, the central office line interface section includes an incoming call detection means and a polarity reversal detection means, the call path switch section includes a first incoming call sound source and a second incoming call sound source having a frequency different from the first incoming call sound source, and the control circuit a ring tone selection means for selecting a first ring tone source and a second ring tone source of the call path switch section; and a ring tone selection means for selecting a first ring tone source and a second ring tone source of the call path switch section; and a ring tone selection means for selecting a first ring tone source and a second ring tone source of the call path switch section; When the ringtone selection means selects a first ringtone source of the call path switch unit when the ringtone selection means detects the ringtone, a first ringtone from the first ringtone source is sent to a button telephone connected to the telephone interface unit. a control means, and when an incoming call to the central office line interface unit is detected by the incoming call detection unit and the polarity reversal detection unit, and a polarity reversal is not detected, the incoming call tone selection unit selects a second incoming call sound source of the call path switch unit; A button telephone device comprising: second control means for transmitting a ring tone from the second ring tone source to a button telephone connected to the telephone interface unit.