JPH0426265B2 - - Google Patents

Description

[Detailed description of the invention]

(Industrial Application Field) The present invention relates to a multifunctional telephone transfer device. (Prior Art) Conventionally, a telephone transfer device is known that can automatically transfer a call received to an absent office to another office or the like. The known device is as shown in Fig. 2, where A is a calling telephone, B is a receiving telephone installed in the office F, C is a telephone transfer device, D is a calling telephone, and E is a forwarding telephone. , G is a telephone line connecting the calling telephone A and the terminating telephone B, R is a telephone line connecting the terminating telephone B and the telephone transfer device C, and S is the forwarding telephone E. T is a telephone line connecting the calling telephone D and the calling telephone D and the telephone transfer device C.
This is a telephone line that connects the office.If calling telephone A calls incoming telephone B in office F, the incoming call will be automatically detected by telephone transfer device C even if office F is not in office. The calling telephone D installed in the office F calls the transfer destination telephone E outside the office, and the calling telephone A and the transfer destination telephone E can communicate with each other. This telephone transfer device C is provided with a separation device connected to the line R and a separation device connected to the line T, and an equivalent circuit is connected to both separation devices. The circuit forms and maintains an AC impedance equal to the respective AC impedances of the line R and the line T, so that the call telephone set A and the transfer destination telephone set E can communicate with each other with good sound quality and amplification effect. I try to do that. (Problems to be Solved by the Invention) However, the known telephone transfer device C does not allow the incoming telephone B or the outgoing telephone If either handset or receiver of device D is picked up and a call is made between the two, the good sound quality and amplification effect described above can no longer be expected. By picking up the handset of the incoming telephone B or the outgoing telephone D, the AC impedance of the incoming telephone B or the outgoing telephone D is changed to the AC impedance of the external line connected to the separating device. This is because the alternating current impedance changes due to interference, and equivalence by the equivalent circuit connected to the separation device cannot be maintained. (Means for Solving the Problems) Accordingly, the present invention has a main body 1 in which a connecting portion 12' to which the called telephone line 12 of the calling telephone A is connected and a calling telephone line 11 of the forwarding telephone E are connected to the main body 1. A 2-wire 4-wire separation section 18 for the receiving side to which an equivalent circuit 20 is connected is provided to the connection portion 12', and an equivalent circuit 19 is provided to the connection portion 11'.
The calling side 2-wire 4-wire separation unit 17 connected to the calling side 2-wire 4-wire separation unit 17 and the calling side 2-wire 4-wire separation unit 17 are connected to the receiving side telephone line 12. The calling telephone A and the transfer destination telephone E are connected to each other via the calling side telephone line 11 so that they can communicate with each other, and the called side 2-wire 4-wire separating unit 18 and the calling side 2 wire 4 wire separation section 1
The gist of this is the configuration of a multifunctional telephone transfer device in which an intervention handset 6 is connected to a circuit that connects a telephone 7. (Embodiment) To explain an embodiment of the present invention using the drawings, reference numeral 1 denotes a main body of a telephone transfer device having functions equivalent to the telephone transfer device C shown in FIG. a push button section 2, a calculation function key 3, a call button 4 for manual transfer, a liquid crystal display section 5 for displaying various telephone numbers, a handset 6, a slide switch 7 for switching the main body 1 to telephone mode or automatic telephone transfer mode; A known hold button 8 for holding a telephone line, station line selection buttons 9 and 10, etc. are provided. The internal circuit of the main body 1 will be explained in detail and concretely with reference to the block diagram and circuit diagram shown in FIG. It's a telephone line. Reference numeral 11' denotes a connection part connected to the telephone line 11, and 12' a connection part connected to the telephone line 12, which are connected to relay contacts 13 and 14, respectively.
The relay contacts 13 and 14 are switched to be connected to the incoming call response detection section 16 connected to the I-O port 15 when the telephone is on standby, and to the 2-wire and 4-wire separation sections 17 and 18, respectively, when the telephone is in use. . The telephone lines 11 and 1 are connected to the 2-wire and 4-wire separation sections 17 and 18.
Variable equivalent circuits 19 and 20 forming an impedance equal to 2 are connected, respectively. 21 and 22 are
2-wire and 4-wire separation parts 17 and 18, respectively, and relay contact 1
This is a relay contact for dial pulse generation provided between 3 and 14. Terminals H and I on the output side of the 2-wire and 4-wire separators 17 and 18 are connected to the input sides of amplifiers 23 and 24 shown in FIG. 5, respectively. The output side of the amplifier 23 is connected via the analog switch 25a of the analog switch circuit 25 and the amplifier 26 to the input side of the 2-wire/4-wire separation section 18 via a terminal J. Similarly, amplifier 2
The output side of 4 is connected via an analog switch circuit 25b and an amplifier 27 to the input side of the 2-wire/4-wire separator 17 via a terminal K. Due to this,
The signal input through the telephone line 11 is transferred from the relay contact 13 to the 2-wire and 4-wire separation section 17 to the terminal H.
→ Amplifier 23 → Analog switch circuit 25a → Amplifier 26 → Terminal J → 2-wire/4-wire separation section 18 → Relay contact 14 The signal is amplified and output to the telephone line 12 side, and similarly, the signal input from the telephone line 12 is output to the telephone line 12 side. The signal is relay contact 14 → 2-wire 4-wire separation section 18 → terminal I
→ Amplifier 24 → Analog switch circuit 25b → Amplifier 27 → Terminal K → 2-wire/4-wire separation unit 17 → Relay contact 13 The signal is transmitted while being amplified, and is output to the telephone line 11 side. The other terminals L and M of the two-wire and four-wire separation sections 17 and 18 are connected to analog switches 25c and 25d, respectively, shown in FIG. The output side of analog switch 25c and analog switch 25d is analog switch 25e.
are connected to the input side of the handset 6 and the speaker 28, respectively. The output side of the handset 6 is shown in FIG. 7 and is connected via an amplifier 29 to the analog switches 25f', 25g of FIG. 5 by a terminal N. 30 is a P/B tone generator whose output side is connected to the analog switches 25f and 25g, and whose input side is connected to the eye port 15. Therefore, in FIG. 3, 31 is the central processing unit, 32
3 is a program ROM, 33 is a storage section, 34 is a backup battery for the storage section 33, 35 is a switch group consisting of the push button section 2, calculation function key 3, manual transfer call button 4, etc., and 36 is a switch group of the switch group 35. The key matrix 37 is a ring tone generation circuit. (Effect) Next, the effect will be described. When the slide switch 7 is set to the automatic call transfer mode and a call is made from the calling telephone device A via the telephone line 12, the incoming call is detected by the incoming call response detector 16 via the relay contact 14. Then, the telephone number of the forwarding destination registered in advance in the storage unit 33 is read out by the central processing unit 31, and the relay contact 13 is opened.
ON, and the P/B tone generator 30 generates P/B.
A tone is output. At this time, SW1 of analog switch 25g is OFF, and analog switch 25g
Since SW1 of f is turned on, the P/B tone is transmitted via analog switch 25f to analog switch 25b → amplifier 27 → terminal K.
→ 2-wire/4-wire separation unit 17 The signal is separated by the 2-wire/4-wire separation unit 17 and then a call is made from the telephone line 11. When the transfer destination telephone E is called and detected by the incoming call response detection section 16, SW1 of the analog switch 25a and SW1 of the analog switch 25b are switched.
SW1 is turned ON, and the telephone line 11 and telephone line 12 are connected as follows: relay contact 13 → 2-wire 4-wire separation section 17 → terminal H
→ Amplifier 23 → Analog switch 25a → Amplifier 26 → Terminal J → 2-wire 4-wire separation section 18 → Relay contact 14, and Relay contact 14 → 2-wire 4-wire separation section 18 → Terminal I
→ Amplifier 24 → Analog switch 25b → Amplifier 27 → Terminal K → 2-wire/4-wire separation unit 17 → Relay contact 13. Lines are connected in both directions, allowing communication between the two. However, if the intervention handset 6 is picked up while the transfer operation is being performed as described above,
The central processing unit 31 detects the off-hook of the handset 6 for intervention, activates the analog switch circuit 25, and transmits the signal from the telephone line 11 side to the relay contact 13 → 2-wire 4-wire separation unit 17 → terminal L.
→ Analog switch 25c → Analog switch 2
5e Also, the signal from the telephone line 12 side is relay contact 14 → 2 wire 4 wire separation section 18 → terminal M
→ Analog switch 25d → Analog switch 2
5e and are transmitted to the handset 6, respectively, and the signal from the handset 6 is transmitted to the amplifier 29 → terminal N → analog switch 25f.
→ Analog switch 25b → Amplifier 27 → Terminal K
→ 2-wire/4-wire separation unit 17 → relay contact 13 → telephone line 11 Also, amplifier 29 → terminal N → analog switch 25f
→ Analog switch 25b → Amplifier 26 → Terminal J
→ 2-wire/4-wire separation unit 18 → relay contact 14 → telephone line 12, respectively. At this time, the intervention handset 6 is
Since it is connected between the line 4-wire separation unit 17 (equivalent circuit 19) and the 2-line 4-wire separation unit 18 (equivalent circuit 20), the AC impedance on the telephone line 11 or telephone line 12 side is No change occurs, 2
A good separating effect can be expected by the line/four-line separation section 17 and the two-line/four-line separation section 18. (Effects) As described above, when the known telephone transfer device C performs a transfer operation between the calling telephone A and the forwarding destination telephone E, the incoming telephone B or the calling telephone If D's handset is picked up and the conversation between the two parties is interrupted, good sound quality and amplification cannot be expected. This is because when the handset is picked up, the AC impedance of the receiving phone B or the calling phone D interferes with the AC impedance on the external line side, causing a change in the AC impedance. This is because equivalence by an equivalent circuit connected to a separation device provided inside cannot be expected. However, in the present invention, the main body 1 has a connection section 1 to which the called telephone line 12 of the calling telephone A is connected.
2' and a connecting part 11' to which the calling side telephone line 11 of the forwarding destination telephone E is connected, and the receiving side 2-wire 4-wire separating part 18 to which the equivalent circuit 20 is connected is provided to the connecting part 12'. , a two-wire four-wire separation section 1 for the transmitting side to which an equivalent circuit 19 is connected is connected to the connection section 11'.
7, respectively, and connect the called side 2-wire 4-wire separation section 18 and the calling side 2-wire 4-wire separation section 17 to the called side telephone line 12 and the above-mentioned calling side telephone line 11.
The calling telephone A and the transfer destination telephone E
are connected so that they can communicate with each other, and the two-wire and four-wire separation section 18 for the receiving side and the two-wire 4 for the calling side
Because the circuit connecting the line separation unit 17 is a multifunctional telephone transfer device in which the handset 6 for intervention is connected, there is no change in AC impedance, and the circuit connects the calling telephone A, the destination telephone E, and the intervention. Good sound quality and amplification effect can be expected between the handset 6 and the telephone handset 6.
This has the effect that mutual communication between the transfer destination telephone set E and the intervention handset 6 can be carried out well. Furthermore, although this embodiment is described using a 2-line and 4-wire type separation device as the separation device, similar effects can be expected even if a 2-line and 4-wire type separation device or the like is used.

[Brief explanation of drawings]

FIG. 1 is an overall schematic diagram, FIG. 2 is a diagram of a known example, FIG. 3 is an overall block diagram, and FIGS. 4 to 7 are circuit diagrams of main parts. Explanation of symbols 1...Main body, 2...Push button section, 3...Calculation function key, 4...Call button for manual transfer, 5...Liquid crystal display section, 6...Handset,
7...Slide switch, 8...Hold button,
9, 10...Station line selection button, 11...Telephone line, 11'...Connection section, 12...Telephone line, 1
2'... Connection part, 13, 14... Relay contact, 1
5... Eye port, 16... Incoming call response detection section, 17, 18... 2-wire 4-wire separation section, 19, 20
... Variable equivalent circuit, 21, 22 ... Relay contact for dial pulse generation, 23, 24 ... Amplifier, 2
5...Analog switch circuit, 25a-g...Analog switch, 26, 27...Amplifier, 28...
...Speaker, 29...Amplifier, 30...P/B
Tone generator, 31...Central processing unit, 32...Program, 33...Storage unit, 34...Backup battery, 35...Switch group, 36...Key matrix, 37...Ring tone generation circuit, A...
...Call phone, B...Incoming phone, C...Telephone transfer device, D...Outgoing phone, E...Transfer destination phone, F...Office, G...Telephone line, H, I,
J, K, L, M, N, P... terminal, R... line,
S...Telephone line, T...Line.

Claims (1)

[Claims] 1 The receiving side telephone line 12 of the call telephone device A is connected to the main body 1.
A connecting portion 12' to which is connected, and a connecting portion 11' to which the calling side telephone line 11 of the transfer destination telephone E is connected are provided, respectively.
0 is connected to the 2-wire 4-wire separation unit 18 for the receiving side, and the 2-wire 4-wire separation unit 17 for the calling side to which the equivalent circuit 19 is connected is connected to the connecting portion 11'. The 4-wire separation unit 18 and the calling side 2-wire 4-wire separation unit 17 are connected to the calling telephone set A via the receiving side telephone line 12 and the calling side telephone line 11.
and the transfer destination telephone set E are connected so that they can communicate with each other, and the 2-wire 4-wire separation unit 18 for the called side
The multifunctional telephone transfer device has an intervening handset 6 connected to a circuit connecting the 2-wire 4-wire separator 17 for the calling side.