JPS5990452A - Telephone set having function communicating between extensions - Google Patents

Abstract

PURPOSE:To attain the communication between extensions each other by using a handset loudspeaker function, in a telephone set having the said function. CONSTITUTION:When a telephone set A calls a telephone set B for communication between extensions each other, extension calling switches K11, K34 are switched to the position opposite to that in the figure, a DC power supply is applied from a controller C to a relay A1 and a communication section T1 via a subscriber L in the loop of [L L1 B1] while connecting only an incoming device B1, the handset loudspeaker function is attained independently of the main trunk, the DC power supply is applied to the telephone set B from the controller C in the loop of (l l2' A2 T1) and the loudspeaker function is attained. When the A calls the B while hooking off the handset, no switching is required for the K11. When the A hooks on the handset (or hooking off it) and calls the B via a transmitter M1, the voice signal is transmitted to the B in the loop of [l2' A2 T2] via an extension cable l.

Description

[Detailed description of the invention]

The present invention enables inter-extension communication through voice calls and voice responses in addition to outgoing calls, incoming calls, handset calls, and handset loudspeaker calls with central office lines.1. This is related to Nuru'l (Ym machine). Conventionally, extension lines between telephones lined up in one telephone line and installed in each room could be connected by installing a new 1r-1tc Inoterhono or by using telephone + 1kt. In case of !FfC, either a receiver for calling an extension is installed in addition to a receiver for receiving a central office line in a separate device from the telephone set, or a receiver for calling an extension is installed in a device installed separately from the telephone. A new extension ring signal power supply or circuit is installed in addition to the DC power supply for extension calls to identify extension calls. Two-way calls were being made.This required the expense and space of establishing a separate facility.Depending on the business situation, it was not possible to provide an immediate response by voice unless the /-ndose,to was lifted up. There were drawbacks such as the inability to respond to calls when operations were not possible. SUMMARY OF THE INVENTION In order to solve these drawbacks, the present invention provides a telephone that has a handset loudspeaker function and is capable of interconnecting extension lines using a handset loudspeaker function. The present invention will be explained in detail below with reference to the drawings. FIG. 1 is an explanatory diagram of the principle of the present invention, and shows a case where two telephones (A and B) having a call function are installed for one central office line. L is a subscriber line connected to the telephone office; I, 1. L2 is the connection terminal for connecting telephone equipment A and B to the subscriber line, H8B,
H8+z, H82+, and H822 are hook switches for each telephone, 'r, , 'r2 is the transmitter M, , M2
Consisting of receivers R, , R2 and communication circuits N, , N2, etc., the communication section, SP, , SP2 is the loudspeaker circuit section, S, , B2 is the speaker, and AI and A2 are the respective als.
Relay with l/A12 and B21/a22 contacts,
C is a control circuit consisting of a DC power supply, etc., t is an extension cable, L1. tl', t2. t2' is an extension connection terminal for each telephone. In addition, Bell. The handset talking section excluding the dial, the loudspeaker circuit section, the speaker, and the handset loudspeaker switch are integrated into a
It is called the Dossett Public Address Call Function Department. 1/This figure shows a state in which two telephones (A and B) are connected, but connections are made in the same way even if there are three or more telephones. The operation of the present invention will be explained separately when making/receiving a call to/from a central office line and when communicating with an extension line. When all telephone equipment lifts the handset to make a call, hook switches H8o and H812 operate, and the [L
1→H8o-+K11-+N+ ] DC power is supplied from the telephone office in the loop, and after confirming the dial tone, a dial signal is sent by the dial DI by normal dial operation, and after the called party answers, the dial signal is sent via the talking part TI. A central office line call is made. Next, when receiving a call, a calling signal (161 (z or 20Hz, etc.)) is sent from the telephone office through the subscriber line.
When the message arrives, the receiver Bl goes through the loop of [L-+Ll-+Bl], and the receiver B goes through the loop of (L-)L2→B2].
2 sounds at the same time. When Party A or Party B or Party B picks up the handset and answers at the same time, the DC power supply for the call end is transmitted from the central office to the subscriber's line in the same loop as when making a call. It is simultaneously supplied to T2 and a central office line conversation is carried out. Now, when I set up a non-end set loudspeaker switch LSI (or LSz) so that people around me can hear the content during the above-mentioned central office line call, [hook switch H8l2 (my father had H8zz) → SP+ (or 5P2 )
→ LS+ (or LSz) → S+ (father is B2)] The conversation voice with the office line is transmitted to speaker S, (or B2)
can be heard by those around you. In other words, it becomes a set loudspeaker call. When the handset (and LSl and LSz are also returned) is returned, the call to the central office line is disconnected. Next, we will discuss the case of one-extension mutual communication. Now, when telephone A calls B and communicates between the extensions, switch the extension mutual communication switches Kll and 12 from the state shown in Figure 1 to the other side, and the subscriber line will be [L-+Lx B
DC power is supplied to the subscriber line from the controller C to the relay A1 and the talking section T1 in the loop of the receiver Bl, and is made from the relay contact all=a12, and the DC power is also applied to SPl, 6- Regardless of the central office line, whether the handset or the like is connected to the KIi controller C,
DC power is supplied through the loop of l, 2'→A2→T1]△, and relay contact a21. The A22 camera was developed, and the SF3 was also developed with direct current. Source is 1) Great, just like A...Nodose,!・Enables loudspeaker calls. In addition, put y□ 7 tose, i & t t te (
If Party A calls Party B with HSI, , HS, , r, r open, there is no need to switch the Kll. If the person in question holds the handset (or may just leave it there), M,
When you call Party B via extension cable t,
2'→A2→T2], the voice signal is transmitted to the telephone of Party B, and the calling voice is sent from B2 to Party B via SF3. After putting down the handset or operating the switch for intercommunication between extensions, the user responds with a voice response of "Handset rich", and a voice signal is transmitted to Party A via M2, and a conversation begins. After the conversation is over, Party A (also 1 and Party B at the same time) presses the extension mutual communication switch KI1. When K12 was restored, controller C was restored and the DC power supply was cut off. Both phones will be on standby for connecting to the central office line. Also, if there is a call from the central office while the extension line is busy, both ringers B and B2 will ring2), so if you know that there is a call from the central office and restore the extension switch, The system enters a line standby state, and can respond to the central office line through a handset call (or handset loudspeaker call) in the same manner as described above. Note that the controller C may be installed in either one of the telephones. FIG. 2 shows an embodiment of the present invention, where L is a subscriber line, LH,
L]', R2, R2 are telephone armor. Connection terminal B, HSll. HSI2, HS2, , HS22 are the hook switches of each telephone, B, , B2 are the ringers, Kll,
Kl□, 13. 21. 22 on. K23 is an extension interconnection switch, d, , d2 are rectifier diodes, Tl, T2 are transmitters M, , M2 and receiver R1. A handset communication section consisting of R2 and communication circuits N, , N2, etc., LT, , LT2 is a loss circuit, CSI,
cs2 is the loss circuit r,'r, , the control circuit of LT2,
SPl, SF3 are loudspeaker circuit sections, S, B2 are speakers,
LSl, LS2 are handset loudspeaker switches, D
l, B2 are dials, A, A2 are all, respectively.
A relay having contacts A12, A21, and K22, C a control circuit consisting of a DC power supply E, etc., t an extension cable, tl. t1'. el. t2.72'+e2 is an extension connection terminal for each telephone. The operation of this embodiment will be explained in the same manner as the principle explained above. In other words, calls to and from the central office line are made using the extension mutual communication switch Kl.
l = KI2. KI3...K2+ - K
22 and 23 in the state shown in FIG. 2 -+. Up to...The second part of the nose setting is done by opening and closing the hook switch using the knife, just like a normal telephone. In addition, LT+. The insertion loss of both LT2 is set to OdB. I'm currently on a telephone call so that people around me can hear what's going on.
When you make the public address switch LS+ (or LS2), [HSI2 (my father's HS22) → SP+ (or S
F3 ) → LSI (or LS2) → S+ (or B2)]
The conversation voice with the central office line is S+ (or B2) through the loop of
You can hear it from people around you. That is, a loudspeaker call is made. Note that the loss circuit LT+ (or LT2) is activated by the control circuit CSl when receiving a call, and an insertion loss occurs, which breaks the sound loop between the transmitter M, (or M2) and the speaker s+ (or 82), and prevents howling. be done. Next, we will discuss the case of mutual communication between extension lines. Now, if telephone A calls B and the extensions communicate with each other, switch the switch for inter-extension communication. , K12. When 43 is switched from the state shown in FIG.
→L] loop connects the receiver Bl [T+→d
1 - + K 13 → KI2 → tl' → l → C] DC power is supplied from the controller C to the talking part TI, and at the same time, the controller C is supplied to the telephone set B [C-+A → tl
'→KI2→tl-+ l-+ t,, →A2→d2→
DC power is supplied through the loop T2]. Relay A2 is activated by the supply of DC power, and contact a21 is activated. A22 is made, and TI and other SP2.82 become operational. Now, when Party A holds the handset (or can leave it on) and calls Party B via Ml, a voice signal is transmitted to Party B's telephone via the extension cable t in a loop of [22 → A2 → T2], A calling voice is sent from B2 to Party B via SF3. If the handset is left in place or if the handset is picked up after operating the extension intercommunication switch and a voice response is made, a voice signal is transmitted to the user via M2 and a conversation is performed. FIG. 3 shows an embodiment of the present invention in which the extension line is configured as a two-wire system, where L is a subscriber line, LL. Ll'. R2. L2
' is lO−? L story Kikou, Koudan Ryo in contact with Otsu, H8H, H812, ll
521, J (S22 is the hook ear of each telephone,
2. K13=K21. 22 = K23 is an extension interconnection switch, BR, BR2 are V (Ae bridge diodes, d, d2 are rectifier diodes, T1.T
A handset communication section, LT, consisting of 2id transmitters M, , M2, receivers R1, R2, communication circuits N, , N2, etc.
l, LT2 are loss circuits, C81, C82 are loss circuits LT
, , LT20 control circuit, SP. SP2 is the loudspeaker circuit section, S, B2 is the speaker, LS
1. LS 2 is a handset loudspeaker switch, I)
1. l) 2 is dial, AI, A2 are all
a12 and A21. Relay with B22 contacts, B,
, B2 are respectively Ha, b,, b;, b,. b, b2. a relay part having b2′, b2″, b:′;
E is a DC power supply for internal lessons, el, el', C2, e2 are power supply connection terminals, t is an extension cable, 4-11 + /-
2 and A2 are extension connection terminals for each telephone. The operation of this embodiment will be explained in the same manner as the principle explained above. In other words, calls to and from the office line can be made by raising and lowering the handset as shown in Figure 2.
This is done by opening and closing the phone like a normal 'telephone 10'. In addition, I, T, , LT2 are inserted in Izuno 1, and Jj3 loss is 0.
dBK is set. Now, if you make a handset loudspeaker switch LSI (or LS2) so that people around you can hear the content during a call on the central office line, [H8l2 (or H822) → SP1 (or SP2) → LS+]
(or LS2)→S] (or 82)], the conversation voice with the central office line can be heard by the surrounding people via 81 (my father's B2). That is, a handset loudspeaker call is performed. In addition, the loss circuit LT, (or LT2) is VC when receiving a call.
I-J, control circuit C8, causes an insertion loss, and transmits transmitter M+ (or M2) and speaker St (or B2).
) and howling is prevented. Next, we will discuss the case of mutual communication between extension lines. Now, when telephone equipment A calls Party B and communicates between the extensions, the switch for mutual communication between extensions K f: is made instantaneously, and the subscriber line is set to [1, -+ l, , → B1 → L, / →L] loop with the pacifier B connected [E(eρ→K(→a
l→Kl −+a1′−+ B+→E(j) ] (7
) Rufuchi IJ L/-Bl Motion action heel b1+ b
+' contact other K is closed, b;/, b:/ is made, and [E(el)→bl-+d1'→Tl
→d1→b+-+A1→E (81')] DC @ source E is applied in the loop, power is supplied to Tl, and
Relay A! operates, A2. A2 contact switches to the other VC, (E(e+)-*Kl-+al-+tl-
+ l--) T2 → a2-) B2 → A2 → b4
→d2−) T2−+ d2→1)2−+ K,, −
+ A2-+ A2-+ z-+ /-1-+ a'
, -+ 131→E(el)) power is also supplied to T2, and the A2°B2 relay also operates, and b2. b2
When Party A calls Party B via M with the handset still in the bag, the audio signal is transmitted from T1 to T2 via extension cable L, and the calling voice is sent from B2 to Party B via SP2. Sent out. When a voice response is made to 1 after setting 1., a voice signal is transmitted to A through M2, and a conversation begins. After the conversation, / K.

When [ is opened, the DC supply to relay B1 is cut off, and b
l. b. When the / contact is restored, relay A] is restored, the extension connection is restored, and the system enters a standby state. As explained above, according to the present invention, a telephone having a handset loudspeaker function is constructed, and the handset loudspeaker call is made between the central office line and the handset loudspeaker, and the handset loudspeaker function section is used to operate the battery. It is advantageous to install a simple controller consisting of a few wires, at a low cost, and to be able to respond to a single voice call in a small space, thereby constructing an extension interconnection network.

[Brief explanation of the drawing]

Figure 1 is a connection diagram for explaining the principle of the present invention, Figures 2 and 3 are
The figure is a circuit diagram showing another embodiment of the present invention. L...office line, Ll, A2...office line terminal, t...
Extension, tl, 71', A2+72, el, C2・= extension (connection) terminal, H8o -H812, H821, H8
22... Hook switch, N, , N2... Call circuit, SPl, SP2... Loudspeaker circuit section, K12,
22... Switch for extension interconnection (DC loop forming means), Kll, 21... Switch for extension interconnection (connection control means). Patent applicant: Iwasaki Tsushinki Co., Ltd. Nippon Telegraph and Telephone Public Corporation agent: Manabu Inuzuka Tsuneo Hakusui 14-

Claims (3)

[Claims] (1) It has an extension terminal connected to an extension line in addition to the office line terminal connected to the office line, and is configured so that a public address function can be added to the communication circuit connected to the office line via a hook switch. and a DC loop forming means for forming a DC loop between the extension terminals, and a connection control for connecting the loudspeaker function to the speech circuit when the DC loop is formed via the extension connected to the extension terminal. 1. A telephone having an extension mutual communication function, characterized in that it is equipped with means. (2) It has an extension terminal connected to an extension line in addition to the office line terminal connected to the office line, and is configured so that a public address function can be added to the communication circuit connected to the office line via a hook switch. At the same time, an extension interconnection switch provided between the hook switch and the communication circuit in order to switch whether the communication circuit is connected to the hook switch or the extension terminal; A DC loop forming means for forming a DC loop between terminals, and a connection control means for connecting the loudspeaker function to the speech circuit when the DC loop is formed via the extension line connected to the extension terminal. A telephone having a mutual extension communication function, characterized in that: (3) A patent claim characterized in that the extension interconnection switch is configured such that when the communication circuit is connected to the extension terminal, the DC loop forming means performs an interlocking operation to form the DC loop. A telephone having the extension mutual communication function described in item 2.