DE19736827B4 - Circuit add-on for a telephone answering machine and a telephone (two telephones) - Google Patents

Abstract

Additional device for an arrangement consisting of at least one automatic changeover switch with one input and two outputs,
with a telephone answering machine and at least one telephone, with a first on the input side on a telephone / telephone line connected automatic changeover switch (AWADo ') has a priority and a subordinate output, the subordinate output is connected to the telephone answering machine (TAB) and the priority one with a telephone (TEL.) or
with the input of a second automatic changeover switch (AWADo ") with two outputs of equal rank, to each of which a telephone (TEL.) is connected,
as well as every connected telephone (TEL.)
for mutual signaling with a call station device (RS) is supplemented, each having at least key switches, a buzzer and a multi-pole connection cable with plug, characterized in that
As an additional device, each telephone (TEL.) also has an additional circuit box (SZUK) with the modules:
- Telephone loop adapter (AD) with a TAE plug and a TAE socket for cross-looping in the connection line of the assigned telephone (TEL.),
where a telephone loop optocoupler (OP) is looped into the b-line, which on the output side ...

Description

The invention includes a Additional device for the interconnection of a telephone answering machine and a telephone (e.g. two phones) on one phone line with additional Features (according to the generic term of claim 1).

At the new digital telephone exchanges of Deutsche Telekom can new features are offered: inquiry and marks. Is at these telephone connections the telephone loop after a telephone conversation [with the telephone (TEL.), or Answering machine (TAB)] not interrupted long enough - e.g .: not a whole second, so the telephone exchange recognizes this as a query request and establishes a new, 2nd connection. A computer voice says: "Your connection will held "and shows that the 1. Connection still exists ("Ruhr Nachrichten" from January 30th, 1996 describes this problem and the anger of the customer.).

The patent DE 196 06 784 C2 shows a simple solution.

However, telephones are hardly used today with special fork switch (GU) and indicator (SZ) or similar manufactured.

Because there are far too many special phones [Phones with name buttons with fax, with hands-free facility and with Radio] is a second range of devices with special fork switch (GU) and indicator (SZ) very expensive! Moreover a new construction is not worth it because it is another ingenious one solution there, namely: the automatic changeover switch (AWADo)! There are automatic ones Changeover switch (AWADo) with 2 equal-ranking outputs, or with a priority exit - over that other (subordinate) exit.

[See, for example: Conrad's catalog from 1996 page 472, with "Automatic Multiple changeover switch ":" AMS 1/2 "(or" AMS 1/4 AP ").

At Deutsche Telekom means the equivalent automatic changeover switch: "Changeover switch T2 NF / F .. "Telekom catalog e.g .: spring / summer 1997 page 165!]

At the subordinate output of the automatic Changeover switch (AWADo ') the telephone answering machine (TAB) is connected to the priority the phone (TEL.) - with Call pick-way [from the telephone answering machine (TAB)] by lifting the handset normally!

In addition, 2 phones are said to be can be connected! That is with another second automatic changeover switch (AWADo ") with 2 peers Exits - instead of one phone - possible.

In this solution with the automatic changeover switch, the flag (SZ) for each telephone (TEL.) Remains as a required component of the main patent [see patent specification DE 196 06 784 C2 Not to mention the additional fork switch (GUV)!

Since the 2nd phone (TEL.) Also outside of the room - where the 1st telephone (TEL.) is - set up a small intercom system for at least 2 call points necessary communication [e.g .: "take over call", or "to take over ready "] needed!

Call systems are shown in:
Europe Teaching aids: Telecommunication technology - specialization Europe no .: 33 412 / ISBN: 3-8085-3345-5 5th edition 1992 / page 237 Fig. 2: shows an intercom system with 3 lines.

On the mesh network system on the side 238 Picture 1, where each of the more than 2 stations call every other station can, this is not possible with 3-wire technology.

The book: "Technical drawing electrical engineering" 1st year of training for industry oder Handwerk 7th edition from Stam Verlag Köln - München Stamm 009 / ISBN 3-8237-0009-X Page 57 Figure 30 shows a bell system with a door opener [- Instead of the door opener insert another bell (Wekker) -] below: in 3-wire technology and in the middle: in 4-wire technology!

With 4-wire technology:
all "alarm clocks" connected to one line of the voltage source and all "buttons" to the other line of the voltage source.

This 4-wire technology allows one Extension to more than 2 stations / call stations by switching in parallel further keys from further call stations [This enables you to create a mesh network build up!]

In the patent DE 196 06 784 C2 . 2 , unfortunately two dropout delay circuits (ABV) and (ABV2) are included, but the component requirement should be kept low for cost reasons.

The object of this invention is to create an additional device that:

• - the Use v: Automatic changeover switch (AWADo) provides
• - for each Telephone (TEL.) Is identical in manufacture,
• - (small and) easy to connect is and
• - the Indicators (SZ) [or similar, e.g .: indicator lights] useful for displaying the status of the document [+ Cost] also taken into account.

As a further task, d. Telephone answering machine (TAB) Moreover remote on and off [from the point of view of the telephone (TEL.)] can be.

The solution (s) to the task (s) is as follows:
Since an intercom system is required because of two [or more] telephones (TEL.) [As already mentioned], all further components are integrated into this required intercom system.

The intercom system essentially consists of:
individual, identical call station facilities, built into compact device boxes,
here also called the short call (RS). This call station (RS) has a buzzer and usefully 2 call buttons [intercom system, in terms of circuitry, 4-wire technology for 3 call stations.]

In this device box of the call station (RS) will be needed Indicator (SZ) or the like [here] simple indicator lamps (L1) and (L2) as display devices intregiert. An extra construction is therefore not necessary! The connecting cord of the equipment box the call station (RS) is ≥ 7 pin flexible connecting cord with plug connector or DIN plug (≥ 7 pin) - known from the [cassette] tape recorder.

The automatic changeover switch '(AWADo') b.z.w. the automatic ones Changeover switch (AWADo ') + (AWADo ") as mentioned at the beginning connected [see also preamble of claim 1].

At the existing telephone connections, a plug-in telephone loop adapter (AD) is connected between the TAE socket and the TAE plug of the telephone (TEL.), Which consists of a TAE plug with some connecting cord and a TAE socket connected to it consists. To monitor the status of the line, either a relay is used in the b-line {A relay would, however, have a higher voltage drop, with d. Relay d. [two] automatic changeover switch [s] (AWADo '+ AWADo "), a 3rd relay connected in series would make little sense, the function might be jeopardized!}, or an [electronic] optocoupler (OP) {(TIL 111) [ ?], with less voltage drop than with relays} with the necessary components {series resistor, parallel resistor, zener diode and capacitor - such as: used in the Siemens family telephone system, where the optocoupler (OP) is in the a-line of the subscriber circuits , among other things, inserted, with other polarity this is also possible in the b-line. The circuit of the family system can be part of the final examination of the Chamber of Industry and Trades Winter 1991/1992 circuit and function analysis part 2 sheet 2 See family telephone system 1/4.

In the published application DE 37 31 308 from Siemens [family telephone system connected to an automatic changeover = switch (AWADo) / switched on, etc.] in column 2 , from line 21 , the following statement was made: "A system corresponding to the FeAp 85/89 telephone system is intended as a family telephone system, which is referred to below as a family telephone system, for example: FTA 1/5." No further details are known.} At the output of the optocoupler (OP), {depending on the power - possibly via a small amplifier [not shown!]}
A loop relay (SR) with a changeover contact (SR) is connected, which also reports the occupancy status for the additional device securely over a longer cable route to another room. It replaces the missing fork switch contact ^V (GU ^V ), from patent specification DE 196 06 784 C2 From the patent DE 196 06 784 C2 2 the final impulse circuit there (SCHL-IMP) [- see here 5a -] adopted as (SCHL-IMP ') [- see here 5b -], whose input / inputs:

• - the Abfallverzögerungsschaltung2 (ABV2), additionally with adjustable drop delay time here as / m. (ABV2 '), with input I / [first] 1st input (INPUT I) and
• - The AND-logic circuit (AND) with its 2nd input here referred to as / with input II / [second] II.-input (INPUTII) [The non-logic circuit (NOT) is omitted because the normally closed contact spring (sr) of the loop relay (SR) is used and thus the document signal is negated!] Separately [- in contrast to DE 196 06 784 C2 ] can be controlled [≙Claim 2].

The circuit of the loop relay contact (sr) is in claim 4, first half, described; and in the second half is the effect achieved.

Therefore, the OR logic circuit (OR) is omitted and the further drop delay circuit (ABV)!

Only the amplifier circuit (VER) follows, via which d. Connector / (DIN) socket + plug and the flexible connecting cord the indicator lamp 1 (L1) is connected as a display device in the device box of the call station (RS).

All [first] I. inputs (INPUT I) of all final pulse circuits (SCHL-IMP ') [of the additional device] are connected to one another via the busy signaling line (BL), additionally the {- by the [ Cellular] loop contact relay ^III (sl ^III) formed -}
Telephone answering line (TBL) connected.

On the telephone answering machine busy line (TBL) are also used as a display device - the indicator lamp [n] 2 (L2), from d. Call station [n] (RS), connected [see / ≙ claim 3].

The claim 6 shows the modified circuit for the Remote switching on and off of the telephone answering machine (TAB).

For the additional device is for each telephone (TEL.) one additional circuit box (SZUK) made of plastic needed in which the 3 assemblies:

• - telephone loop adapter (AD),
• - the actual core area of the additional device with
• - the Final pulse circuit '(SCHL-IMP') and
• - that Amplifier (VER) and
• - d. ≥ 7-pin connector / b.z.w. (DIN) socket for the call station (RS)

according to the characteristic part of claim 1 [without the last 2 sub-items] are included. The Lid is usefully lid for the TAE socket and d. Connector / (DIN) socket of the call station (RS) with the corresponding Cutouts.

The additional circuit box (SZUK) contains enough Terminals as connections, where at least 2 [-3] wires can be clamped by the connecting cable.

There is also enough space for once needed Diode (DI) available.

For the indicator lights 2 (L2) are the bridge of the terminals / connections: from (G) to (TBL) and also from (BR ') to (BR ") to be inserted / available.

The bridge: from (BR ') to (BR ") can also be replaced by a voltage-reducing component if the voltage on the telephone answering line (TBL) is one for the indicator lamp 2 (L2) [especially when using LEDs] leads to high voltage. The call station (RS) is generally designed and can also be used independently of any additional equipment. That is why it has a connection for an internal battery.

The interconnection of the buttons 1 (T1) and the buzzer (SM) is not mentioned in detail, since it is known and from the entire circuit - see in particular 2 + 3 - can be seen.

Other bridges not shown are conceivable for voltage adjustment of the components.

The additional circuit boxes (SZUK), the telephone answering machine (TAB) and a required power supply connected with connecting cables [telecommunication cables] [≙ of claim 1 the last two sub-items].

The TAE plugs of the additional circuit boxes (SZUK) are originally existing in the installed TAE sockets, the TAE plugs of the telephones (TEL.) into the TAE sockets of the additional circuit boxes (SZUK).

The connectors of the call stations (RS) are plugged into their (DIN) socket / their plug connector of the additional circuit boxes (SZUK) plugged.

Of course not only the automatic ones can Changeover switch (AWADo ') + (AWADo ") in one Device be summarized, the relays there also have another changeover contact (rk) have the function of the changeover contact (SR) of the loop relay (SR). The telephone loop adapter (AD) in the telephone lines is no longer required then and the loss of voltage on the phone line decreased accordingly (!) [≙ claim 5].

Now based on the drawings the most important functions of the invention, the "additional device", in examples (partly in several parts: 1 .. + 2 ..). The drawings show u. tables following content:

1 : Overview plan / block diagram

2 : Additional circuit box (SZUK) with call station (RS)

3 : Connection diagram for the additional circuit boxes (SZUK), the telephone answering machine (TAB) and the power supply

4 : Connection diagram for a telephone (TEL.) With additional circuit box (SZUK); The telephone answering machine (TAB) is switched remotely (on / off)

5 : (a + b) final pulse circuits:

5a : Final pulse circuit (SCHL-IMP) "[old]" Extract from the patent DE 196 06 784

5b : Final pulse switching (SCHL-IMP ') "[New]" [modified version - here!]

6 : (a + b) level map from the [in 5b shown] final pulse circuit (SCHL-IMP '):
H ≙ high = high
L ≙ low = low
t ≙ time = time

6a : Loop relay contact (sr) of the relevant final impulse circuit (SCHL-IMP ') in the idle position [- Fall-off delayed -]

6b : Loop relay contact (sr) of the relevant closing pulse circuit (SCHL-IMP ') actuated [- only closing pulse -]

7 : all automatic changeover switches (AWADo) with additional relay contact (rk)
a section ≙ for an exit /
for a telephone (TEL.), or
for the telephone answering machine.

Table 1 shows the reference numbers of the assemblies and components;
Table 2 shows the reference numbers of the connections.

1AD.) Supported by a Telephone (TEL.) With telephone loop adapter (AD)

By lifting the handset on the telephone {TEL.), For example: "1", [on the telephone "2" everything was transferred in]] the telephone loop is over:
the telephone loop adapter (AD) of the 1st additional circuit box (SZUK), above the [1st output of the] automatic changeover switch (AWADo ") and its input, above the priority (V) output of the automatic changeover switch '(AWADo ') and its entrance - in a known manner - to the telephone exchange / telephone exchange is closed [see 1 ].

In the telephone loop adapter (AD), the optocoupler (OP) is also activated in the b line during the telephone call, and its output [possibly via an amplifier - not shown!] the loop relay (SR) via: Plus (+), the optocoupler (OP) on the secondary side, the loop relay coil (SR) and the like. Controlled minus (-) [see 2 ]. The additional circuit box (SZUK) receives the voltage [plus (+) / minus (-)] from the power supply unit via the connection cable [telecommunication cable]. The loop relay contact (sr) is actuated - see further sections 2A + 2B!

1RK.) Received by telephone (TEL.) with additional Relay contact (rk) in the automatic changeover switch (AWADo):

By lifting the handset on the phone (TEL.), For example: "1", [on the phone "2", everything is transferred in the transfer], the telephone loop is activated via: the [1st output of the] automatic changeover switch (AWADo ") and its Input, above the priority (V) output of the automatic changeover switch (AWADo ') and its input - known to be closed to the telephone exchange. The additional relay contact (rk) for the 1st output of the automatic changeover switch (AWADo ") is also actuated [see section "1." the 7 ]. The relay contact (rk) takes the place of d. Loop relay contact (sr), further see (also) d. Sections 2A + 2B!

1TAB.) Telephone answering machine (TAB)

The telephone answering machine (TAB) accepts the telephone call and thus also closes its [telephone] loop relay contact (sl ^III ), which receives the (telecommunication) connection cable from the additional circuit box (SZUK) Plus (+) above the connection (s') and there is via its closed [telephone] loop relay contact (sl ^III ) and the connection (s "), the [telecommunication] connection cable for connecting the telephone answering machine busy signal line (TBL) to all additional circuit boxes (SZUK), via the bridge [n ] (TBL) - (G) to (G) connection / connections [- see 3 ], and via the diode (DI) to the busy signal line (BL) and its connection - further see sections 2A + 2B!

From the (G) connection it goes in the additional circuit box (SZUK) over the bridge (BR ') - (BR ") to the connection ( 6 ) (DIN) socket / plug / connector via flexible connection cord to indicator lamp 2 (L2) in the call station (RS) and back via d. flexible connecting cord, i.e. connection ( 5 ) d. (DIN-) socket / plug / connector to the minus (-) of the additional circuit box (SZUK) [- see 2 ].

The indicator lamp 2 (L2) lights up as long as the telephone answering machine (TAB) has closed its [telephone] loop relay contact (sl ^III ).

By looking at the indicator lamp2 (L2) the user knows that the Telephone answering machine (TAB) has accepted the telephone call and can - if desired - the telephone call [on known way] [since the telephone (TEL.) is switched with priority with the automatic changeover switch (AWADo ') is!].

If the telephone answering machine (TAB) has finished its announcement and opened its [telephone] loop relay contact (sl ^III ), the user recognizes this when the indicator lamp 2 (L2) goes out.

In between there is a switch off telephone availability possible - see Section 3TAB.)!

2A.) The function of Final pulse circuit (SCHL-IMP ') whose Loop relay contact (SR) is not actuated

An external loop relay contact (sr) or (sl ^III ) [from the telephone answering machine] that is not associated with it is actuated and it arrives from: Plus (+) via d. actuated [n] contact (spring) of the loop relay contact (sr) or (sl ^III ) a busy signal on the busy signal line (BL).

The busy signal on the busy signal line (BL) gets over the 1st input (INPUT I) of the final pulse circuit (SCHL-IMP ') for Abfallverzögerungsschaltung2 (ABV2 '), where it delays waste / around the Abfallverzögrungszeit extended - to the first input of the AND logit circuit (AND) is passed on.

Since the own, associated loop relay contact (sr) is not actuated, from: Plus (+) via d. not actuated [n] break contact [spring] of the loop relay contact (sr) a "continuous signal" to the second input (INPUT.II), the final pulse circuit (SCHL-IMP ') and thus also to the second input of the AND logic circuit (AND ), so that the output signal of the drop-out delay circuit 2 (ABV2 ') is output directly / unchanged as the output signal of the final pulse circuit (SCHL-IMP') {see 5b and the level plan 6a [Off delay]}.

This output signal [(dropout delay)] reaches the amplifier circuit (VER) and from there via the connection ( 7 ) d. Connector / (DIN) socket + plug and the flexible connecting cord to the indicator lamp (L1) in the device box of the call station (RS) and from there back over the flexible connecting cord and the connector ( 5 ) d. Plug connector / (DIN) plug + socket to the minus (-) of the additional circuit box (SZUK) [- see 2 ].

2RK.) With additional Relay contact (rk) at 2A.) + 2B.)

Instead of the loop relay contact (sr), the relay contact (rk) has the same function - see the sections 2A .) or 2B.)!

2B.) The function of Final pulse circuit (SCHL-IMP ') whose Loop relay contact (sr) actuated is:

Your own associated loop relay contact (sr) is operated and it gets from: plus (+) over d. actuated Working contact [spring] of the loop relay contact (sr) a busy signal on the busy signaling line (BL).

The busy signal on the busy signal line (BL) gets over the 1st input (INPUT I) of the final pulse circuit (SCHL-IMP ') for Abfallverzögerungsschaltung2 (ABV2 '), where it delays waste / around the Dropout delay extended - to the first input of the AND logic circuit (AND) is passed on.

Since the associated loop relay contact (sr) actuated there is no "permanent signal" at the (second) II.input (INPUT.II) of the final pulse circuit (SCHL-IMP ') and therefore none at the second input of the AND logic circuit (AND), so that Output signal of the drop delay circuit 2 (ABV2 ') not as Output signal is emitted.

Only when the associated loop relay contact (sr) is in the rest position again from: Plus (+) via d. non-actuated break contact of the loop relay contact (sr) again a "permanent signal" to the (second) II input (INPUT II) of the final pulse circuit (SCHL-IMP ') and also to the second input of the AND Logic circuit (AND), so that the output signal of the drop-out delay circuit 2 (ABV2 ') - which now only from d. Fall-off delay time exists - as output signal [- as a "final pulse" -] the final pulse circuit (SCHL-IMP ') is given {see 5b udPegelplan 6b [only final impulse]}.

This output signal [(final pulse)] reaches the amplifier circuit (VER) and from there via the connection ( 7 ) d. Connector / (DIN) socket + plug and the flexible connecting cord to the indicator lamp (L1) in the device box of the call station (RS) and from there back over the flexible connecting cord and the connector ( 5 ) d. Connector / (DIN-) plug + socket to the minus (-) of the additional circuit box (SZUK) [- see 2 ].

3TAB.) Switch the telephone answering machine (TAB) on or off remotely: [- see in each case 4 -]

The telephone standby switch (TB) is switched on: If there is a [telephone] call, the call relay (ON) of the telephone answering machine (TAB) the [telephone] call via the Capacitor (C). The call relay contact that closes in rhythm with the call (on) gets over the closed telephone standby switch (TB) there is a "Plus / +" u.g. to the remaining circuit of the telephone answering machine (TAB) continues, so that the [telephone] call Is accepted.

The telephone standby switch (TB) is switched off, this also counts as prepared for remote switching: The call relay (AN) of the telephone answering machine (TAB) can be independent of the setting of the telephone standby switch (TB) a [telephone] call via the Accept capacitor (C).

The call relay contact that closes in rhythm with the call (on) does nothing, however, since the telephone standby switch (TB) is open and therefore no "plus / +" to the call relay contact (on) passes on.

Likewise, there is no "Plus / +" from any call station (RS) because all keys 2 (T2) are open! Switch on remotely, the button (T2) of a call station (RS) is actuated / switched on:
From the plus (+) of the telephone answering machine (TAB) it goes over the connection cable [telecommunication cable] to the plus (+) of the additional circuit box (SZUK), then over the connection ( 4 ) d. Plug connector / (DIN) socket + plug and the flexible connection cord for closed [latched] buttons (T2) in the device box most of the call station (RS).

The "switched plus" goes back from there: the flexible connection cord and the connection ( 2 ) d. Connector / (DIN) plug + socket for additional circuit box (SZUK) - connection ( 2 ), the connection cable [telecommunication cable] to the connection (tb) of the telephone answering machine (TAB) and there to the call relay contact (on). If the call relay contact (on) is closed by a [telephone] call, the remaining circuit of the telephone answering machine (TAB) gets "Plus / +" and accepts the [telephone] call [Without closed telephone standby switch (TB)!].

On the actuated button (T2) the user recognizes that the Answering machine (TAB) is switched on.

off remotely

the button (T2) of the call station (RS) is switched off / the actuation of the button (T2) is canceled:
The circuit is interrupted by opening the button (T2). The call relay contact (on) does not get a "plus / +" and cannot pass it on to the rest of the circuit of the telephone answering machine (TAB).

So the [phone] call is not accepted.

WE.) Further development

WE1.) The signal lines (BL), (TBL), (1), (2) u. (3) can also about a data bus line are transmitted.

This is particularly useful if the telephone answering machine (TAB) is responsible for several [eg: 4] telephone lines [eg: DE 40 29 397 A1 . DE 42 08 110 A1 among other things], so that almost everything has to be 4 times available!

WE2.) In addition to the 4 telephone standby switches (TB1) to (TB4) the 4 announcement text switches (AT1) to (AT4) can also be switched be made [e.g. by power surge (switch) technology] and also the set announcement texts (I.) or (II.) in each call station (RS) be made visible!

WE3.) Furthermore, the intercom system be expanded that of any possible Any other call station (RS) can be called.

By agreed call signals one could thus also call the employee of the neighboring department, even if he has a different telephone line, but is on vacation / sick leave can give meaningful information.

WE4.) It is also conceivable to use the "additional device" in conjunction with an intercom system (with data bus). Then you need also no agreed call signals but can send the information directly by giving. An intercom with "additional equipment" evaluates the "normal" telephone (TEL.) With the automatic ones AC switches (AWADo ') + (AWADo ") ∽ to a" telephone system ".

WE5.) In connection with a listening set [e.g .: a solenoid that is nearby of the transmitter in Telephone (TEL.) Is attached] can also be done via a corresponding key let another employee listen to the intercom.

S.) Other and final remark

If there is no additional [telephone] loop relay contact (sl ^III ) in the telephone answering machine (TAB), an additional telephone loop adapter (AD) with an optocoupler (OP) in the b line and the connected loop relay (SR) with the loop relay contact (sr)
[- but without final pulse switching (SCHL-IMP ') etc.–] can be used, as with telephones (TEL.)!

The optocoupler (OP) can also, like in the family telephone system from Siemens in the a-line [ in the b-line].

Without telephone answering machine (TAB) let yourself the "additional device" even for 3 telephones (TEL.) [with 3 additional circuit boxes (SZUK)] use.

The equipment boxes of the call station (RS) can be structurally be designed to be similar the known telephone (numbers) register boxes look. Then they can Call stations (RS) are placed under the phones (TEL.) like the telephone (numbers) register boxes! This also applies if a complete intercom is used [- see Development].

From the above it is clear that even on telephones (TEL.) Without additional fork switch contact V (GU ^V ) and without indicator (SZ) using automatic changeover switches (AWADo)
an "additional device" for waste-delayed document reporting is possible.

There are also two telephones (TEL.) possible.

Claims (6)

Additional device for an arrangement consisting of at least one automatic changeover switch with one input and two outputs, with a telephone answering machine and at least one telephone, with a first on the input side on a telephone / telephone line connected automatic changeover switch (AWADo ') has a priority and a subordinate output, the subordinate output is connected to the telephone answering machine (TAB) and the priority one with a telephone (TEL.) or with the input of a second automatic changeover switch (AWADo ") with two same-ranking outputs, to which a telephone (TEL.) is connected, as well as each connected telephone (TEL.) for mutual signaling is supplemented with a call station device (RS), each of which has at least key switches, a buzzer and a multi-pin connection cable with plug , characterized in that each telephone (TEL.) also has an additional circuit box (SZUK) with the following components: - Telephone loop adapter (AD) with a TAE plug and a TAE socket for cross-grinding in the connection line of the assigned telephone (TEL .), with a telephone loop optocoupler (OP) looped into the b line w on the output side controls a loop relay (SR), the contact (sr) of which is used to report receipt for the assigned telephone (TEL.), - final pulse circuit (SCHL-IMP ') consisting of a dropout delay circuit2 (ABV2') and an amplifier circuit (VER) , which controls a first display device (L1) for document notification, - multi-pole socket for connecting the plug of the assigned call station [n device] (RS), - the call station device (RS) additionally a first display device (L1) for document report and a second display device ( L2) for document notification, the latter indicating a telephone / telephone line occupancy by the telephone answering machine (TAB), - connecting cables for connecting the individual additional circuit boxes (SZUK) to one another and for connecting those with a loop contact (sl ^III ) of the telephone answering machine (TAB) - for Notification of a loop closure by the telephone answering machine (TAB) - connected telephone Answering machine busy signal line (TBL), and a common power supply unit is assigned. Additional device according to claim 1, characterized in that that the final pulse circuit (SCHL-IMP ') - a first entrance (EING.I) on which the drop delay circuit 2 (ABV2 ') connected whose output is at a first input of an AND logic module (AND) is connected and - one second input (IN.Ih) which has a second input directly of the AND logic module (AND) is connected - and the delay time the fall delay circuit 2 (ABV2 ') adjustable is. Additional device according to claim 2, characterized in that the first inputs (INPUT.I) the final pulse circuits (SCHL-IMP ') via a busy signaling line (BL) is connected to each other, on who also about a diode (DI) the telephone answering machine busy line coming from the telephone answering machine (TAB) (TBL) is connected, on which also the display device (L2) for the telephone answering machine (TAB) is / are connected. Additional device according to Claim 3, characterized in that the loop relay contact (sr) is designed as a changeover contact, - positive potential is present at its central contact spring, - its normally closed contact spring at the second input (EING.II) and - its normally open contact spring at the first input (EING. I) the final pulse circuit (SCHL-IMP ') is connected so that - in the non-actuated state (idle position) the busy signal coming from outside via the busy signal line (BL) is passed on with a delay in decay and - in the activated state (working position), ie with a busy signal from the assigned telephone (TEL.) no output signal is generated - only a final impulse is passed on at the output again when it is not actuated (rest position). Additional device according to one of claims 1 - 4, characterized in that the loop relay contact (sr) of the telephone loop adapter (AD) is replaced by an additional relay contact (rk) in the automatic changeover switch (AWADo), specifically by the relay that leads the line circuit for the corresponding output, so that the telephone loop adapter (AD) is omitted. Circuit arrangement for a telephone answering machine (TAB) for use with an accessory according to Claim 1, with a call relay (AN) and a telephone standby switch (TB), which is closed for / when answering a telephone call, however et al is open when editing an announcement, characterized in that that the telephone standby switch (TB) in series with the relay contact (on) of the call relay (AN), and that a key switch (T2) of the call station device (RS) connected in parallel to the telephone standby switch (TB) is, so that remote control of the telephone standby switch function possible is.