DE2311853C3 - Method for a telephone exchange with subscriber stations developed as exchanges - Google Patents

Description

w installation and then the original «Eat the calling subscriber station for the purpose of Ver-Seich with the identification saved at the called subscriber station and the call signal to the called subscriber station and arrange for this identifier to be deleted

As a result, although there is no through-connection between the subscriber stations affected and the 7 " _tra le control device is no longer occupied, in a simple way by a switching measure of the calling telephone station that is in the waiting state, its call signal is given to the called party In this way, a correction by re-dialing is also possible in multiple ways.

can be identified in which the originating address is stored and to which the gepre-IS.de call sign is assigned. With existing Direct call can also direct call signaling of the calling subscriber station to the called subscriber station can be directly influenced.

According to a further embodiment of the invention, due to the deletion of the identifier Z, the original address at the called subscriber can be set up and established by incoming and outgoing connections via the central control device.

These interrogation sets are, however, on the lejl-

users place the selection keypad, the direct route keys, the call and watch lights together

assigned. Only the respective cancel keys, ^ ωωι-

keys, conference keys and occupancy keys are for

each interrogation set is available separately and wiricsam. One of the two interrogation fittings is to be preferred

thought or main point, and that is what it is The interrogation set of the so-called watch leader, while the second set as the auxiliary interrogation set the second, assigned to the Wacmeuer Officials of the participant tax to the venu

is standing. Each subscriber station is therefore a so-called Air traffic control center permanently assigned.

Depending on which query arm a prospective or an incoming \ ^^^ t comes from, a «^ J ^^^ S.

cifische switching measure to carry out then the assignment ^ common S for the required time takes place, ie. ^ ¹ »g Election, for example, until the end of the election identification, which is determined by the election evaluator of the control section of the

Participant place is given.

Telephone traffic in air traffic control systems is characterized by a high frequency of occupancy and very short conversation scenes. Thereby .st the Time from the beginning of the occupancy to ram report ^

always longer than the talk time. The traffic

^from

^tax -

With the same switching _{measure, 35} officers from the air traffic control participant telea were wi d

r ^{grounding "ηTeilnehmer} - ^^ * ^ ™ ^

According to a further embodiment of the invention exist? the switching measure causing the deletion from a new election in the waiting state.

in accordance with a further embodiment of the invention be ehts the switching measure that caused the deletion from a query key press on one of the iiner assigned to the calling subscriber station i when waiting.

system can connect to backup locations a plant

agreed, defined airspace. · ^ ^e J areas are divided into the J «« * rungsplatzgruppe ^utew »iV _t
must fly planes in common Artait Ae ..

therefore constantly with each other

Ii IS

before it is part of a switching system that specifies

this

set of questions. As a peculiarity, the subscribers are all ' ^a "" ren ^ ™ ^ _both queries Le own incoming and outgoing z "n, Kopmemsajnen ^" mnwj "*" ^ "J ^ * ^" s guidance

Direct calls) using the corresponding call lamps, the corresponding call lamp,

to be shown. These waiting calls can be switched on by e.g. ALI . This iinti original store

each set of the subscriber station by a recorded original address of the calling

corresponding switching action can be queried. Subscriber station is used when reporting the called

The respective connection status is always optically 5 subscriber station for backward establishment of the

and / or displayed acoustically. In addition, in the desired connection.

each direct call key by lighting up a lamp. Only if a subscriber station has more than one caller Direct call subscribers up to the existing set of questions to meet a certain special number can be displayed by direct call buttons. conditions that are described below

The coupling network available for each system is symmetrical, is assigned, must have additional, three-level A, B, C per subscriber station and corresponds to one head of the common network then for all interrogation sets with the same traffic offer for all the original memories provided for each interrogation route , set a target memory, e.g. ZSIl, is provided

For the following explanations it should be assumed, in which the address of the selected one is stored, that three call lamps and 15 called subscriber stations are stored for each workstation, ten direct call keys with two interrogation sets. This means that the maximum number of subscriber stations has only one common call number for the possible, waiting call states per work, but for an outgoing call and backward position for the number of possible call states, as set up after reporting the interrogation set to be called 13: 2. For this reason, a call initiation *> can be clearly identified,
In the case of the system described below from When using destination memories, the original speech path network is separated, i.e. that the call logs are not required if, contrary to the introduction, no connection is made through the speech path network described in Sections 1 and 2 below, but through the Central control unit is an example of the establishment of a connection in the direction of the ZSE . Therefore, the Kopas is to be measured with redial and request to report (Abpelnetz only for the number of possible call cuts 4 and 6), ie without reporting the calling connections. Subscriber station can be done accordingly.

also the number of necessary crosspoints. Each subscriber point is still delimited for all stay, question sets together a permanent memory, z. B.

During a waiting state, the central control unit 30 is assigned to FS1, in which its own address is stored in the control device and the other central storage devices that are free for other functions on request from the central control device. The coupling point is transmitted to the remote station,
network is not accepted for the waiting call state. question, is every participant an auxiliary goal

Since the guard in the handling of their storage, z. B. HSI, with the help of which outputs are very heavily used and each an additional connection can be established, avoiding risk in the course of conducting the aircraft without having to be connected to the querying set, it is advisable to use a connection ordered target memory must be deleted. Also, production between two subscriber stations of this auxiliary target memory is provided with more than one Abinuner both of switching measures of the calling 40 interrogation set for this jointly, since as well as of switching measures of the called part - the probability that at the same time over several subscriber station or interrogation set depends on interrogation devices of a subscriber station Make inquiries. This means that the connection is only established when the call partner is reporting connections or conference connections is low.
the speech channels are to be initiated. 45 All functions of the connection establishment, such as

In the system described below, the choice, request for the control units, conversion, mar-

in other words, always first from the calling station an activation, free and busy signaling, automatic

desired subscriber station to be called by dialing call repetition, reporting and other operations

or pressing a direct call key and are determined by the control modules, the memories and the

This partial corrector is initiated or executed via the central control device ZSE. To this

subordinate position, if it belongs to the same plant, wise becomes a large part of the function and logic

controlled and a signaling when the called in which the corresponding subscriber station is assigned

fenen position switched on, then only then preprocessed assigned control part. So be

in the case of a switching action by the called subscriber - short times for establishing the connection and short ones

in the form of a message identification over the 55 occupancy times of the central control device.

Central control device for marking and marking.

searches for the connection through-connection to It should also be mentioned that the information in the

start. Two-of-five codes are transmitted for traffic between two systems. The original

are line transfers to jet! cm connection, jump, target, fixed and auxiliary target memories are be

line end interposed. 60 proposes a two-out-of-five code for storage

The above assumes that twenty bits are executed on each part, while the direct

Subscriber station at least one so-called original call buttons assigned memory only one Bi

memory US need to save for each incoming, waiting call, because this direct signal is

is provided if no direct call key is rushed for this is controlled via a converter,

is available. In such an original memory, 65 it should also be mentioned that each connecting line

eg US 11, the called subscriber station TSl transmission, which is used here as a cross-connection line

the address of the calling subscriber is always drawn and each of a certain ver

place saved. Belonged to such a school of law, as did the participants

make have an original store. Via control device ZSE to the original memory, e.g. B.

these transmissions can be transmitted to USnI, the desired subscriber station TSn

whose plants can be reached. carry where they are until the deletion of the call request

In the following, the individual processes or the disconnection of the connection are saved.

remains 5 chert when establishing a connection and with special functions.

with the storage of the original address in the

example of a system of a switching original memory USnI of the desired subscriber

systems for air traffic control. merstelle TSn is in the common part Gn of the

Control table KTn this subscriber station the dem

!. Issuing connection establishment between two io original memory USnI assigned call lamp

Subscriber stations within a system ^ Ln \ switched on.

So now is with the called subscriber station

Each subscriber station TSl, TSn etc. consists of the waiting, calling subscriber station identified

draws a control part Sl, Sn , etc. and a control table. Only the waiting interrogation set of the partial

KTl, KTn etc. The control part Sl, Sn gives the customer station TSl can neither during this time

I am missing to the central control device ZSE and still receive an incoming call

also establish an outgoing new connection from this central control device Infor- without

mations and commands. The control table is complete - the existing request is deleted,
borrowed signaling elements and dial buttons as well

Direct call buttons and the answering sets are assigned to 20 2. Report the called subscriber station
net. The speech paths between two subscriber stations

Either the guard officer or the auxiliary officer are sent directly to the sets via the coupling network

switched through, with the interposition of the signaled incoming, the longest

the subscriber connection, e.g. TAX. The tax-waiting answer the call by having his

share Sl, Sn of two connected subscriber stations 25 picks up the listener and the interrogation assigned to him

TSl. TSn are operated as control buttons via pilot wires SLl, SLn,

can also be connected via the coupling network. It should also be mentioned that if, for example

The outgoing election is z. B. from the query three original memory per subscriber station curtain set A 11 from the part of the election supervisor by sending, at the same time three addresses of incoming lift the listener and dial using the keypad 30 calls per subscriber station can be stored, initiated while the election via the Second off- These calls are assigned to the interrogating set in the order of the auxiliary official's inquiry set AU by picking up the meeting
of the listener, pressing an occupancy key Sl and With the initiation of the query, the subsequent dialing is initiated again with the keypad. Central control device ZSE is requested and is. These different switching measures at 35 already in the central control device ZSH 'will ensure the occupancy of the individual requesting service station TSn required for this via the subscriber control switch PS with further call initiation. " ⁰ ^ ss is contained in the original memory USnI

The selection information is assigned in a tene the source address to the central control in control section Sl, 40 memory added optional device not shown ZSE existing latch ZSP and upon complete choice given. Now through the center of a corresponding Steuereinrichwelche, the control part tung ZSE through the viewfinder SA which the origin Associated choice reviewer is determined address corresponding subscriber station TSL festgedie central control device ZSE provides over the partial and controlled. The subscriber station switch PA in the read-only memory is connected to the control part S1 which emits the request 45 FS I address of this subscriber station TS 1. The dialing information coming from the original memory USnI is transferred to an intermediate memory and in the intermediate memory ZSP of the central ZSP and the central control device ZSE . Control device ZSE stored original At the same time this selection information is compared as an address for security. If the destination address matches the query set All 50 mung is recorded by the central control device ZSE assigned target memory ZS 11. The centering of the marking of the original called and traie control device ZSE causes now on the originally calling Teönebmersteöe TS n AnschlnSsucber SA the control of the ge desirability and 75! because exciting vemen. With the help of participants, 2. B. 7Sn. There is a request from Wegesucbers WS via the coupling stages C, the incentive given to the control part Sn . 55 S, A is under ZuhüfeiiahHie the StenIERTk diesel

If the call is not a participant and the Teünefameranscfaaftungei Direct call, so now only measured whether TA 1 trad TA # 1 the connection between the two

in the control part Sn of the respective participant TeimehiaersteQen TSl and TSn end the eatspre-

put TSn into an original memory, e.g. USnI. sponding AbfragegarnitBren AU nod Anl superiors

free if I «this is the case,» 0 the hn 60 is used first.

Intermediate storage ZSP of the central Steoeremrich- E * should also be mentioned that the determination of whether dk

tion ZSE existing address with the address in the interrogation set A 11 or the interrogation set A ti

Fixed storage FSn compared for security. Arachbe- der Tettaebmerstefle 751 with the addenda

Bend is controlled by the central control device ZSE To connect the contractor is, on grand one:

the original address of the calling subscriber- 65 comparison of that from the Festspekoer FSn of the ska met

ask TSl from the FesUpekher FSi. deaden TeiraehraersteQe TSn Sba the Zeatrak

The address of the calling subscriber cell TSl control device ZSE for gdi ucj

is given by the FesUpeicher / Λ1 via the central participant flelk Γ51

SB632TZ

the content of the target memory ZS 11 and ZS 12 takes place. a match in a source store

It is determined in which target memory there is a deletion of the original memory content

the destination address is included. The result is caused by.

the control part Sl directly to the subscriber circuit This deletion is given to the Central Steuereinrich- TA 1, where the through-connection reported that of five processing ZSE, and then, from the query set all outgoing lines of the original called sub-switching matrix is caused to memory FS n. Simultaneously, the slave office TSn over the central control device central control device ZSE is transmitted which ZSE is transmitted, the so-called destination address to be deleted partial query set the originally calling participants site TS 1 and the slave place there with the content to be marked. Accordingly, io the target memory ZS 11 and ZSlX advertising compared, and in the also in the switching stages C, B, A the Markte- the destination memory in which the tion from the permanent memory, and carried out the route search. the called subscriber station TSn coming

For each interrogation set, this address is stored as the target address via the switching matrix

an incoming and an outgoing connection address deleted. This deletion will also be the

intended. This means that both incoming as 15 central control device ZSE reported and the latter

cloth walking the connection you make in one direction is then enabled.

from coupling stage C to coupling stage B, and further It is now with the originally called sub-

from B to coupling stage A, but for incoming subscriber station TSn the named original memory is

iind the outgoing direction must be set up separately. goes out and the corresponding call lamp is switched off.

The connection between the answering part 20 tet. The one that deleted the connection, originally

Subscriber station TSn and the interrogation set A n \ calling subscriber station are now for example

So runs from the subscriber station TSn via the new dialing a new call request to a

Coupling stage C to coupling stage B, further to coupling other place. So in this way is also at

sruie A and to the subscriber station TSl, namely wrong dialing a correction possible,

to the query set All. 25 _Λ ", ,, ·,,,. " _T "

After the connection has been switched through, the number is repeated ⁴ times on busy
Central control device ZSE released again. It is assumed, for example, that the Wach-Im original memory (z. B. USnI) of the reporting manager of the subscriber station TSl via the interrogation garden subscriber station TSr remains the original digit / 411 an outgoing connection to the subscriber address and in the destination memory (z. B. . ZSL) wants to produce the originally 30 merstelle TS n and for this purpose "prünglich calling subscriber station TSI is this subscriber station using the touch keypad or the destination address for the overall duration of the connection has been selected by the DSS. Here are the saves. the switching operations described in section 1

"_ ..,. ,,,. _rf . to run. The central control device ZSE has over

3. Deleting an existing call request _{35 controls the searcher SA the} subscriber station TSn ,

the part of the calling subscriber station _{and the JEM sJnd but a "e UrsprungsS} p _e i _{cher to Usni}

If a calling subscriber station TS1, for example US n3, is attached to the subscriber station TS η to be called. wise the guard, via the query frequency All, This is in the central control device ZSE, as already described in section 1, identifies a different one, and based on this identification subscriber station, e.g. TSn, a signal is sent to the control part within its own 4 ° drawing If the call system is selected, then the call pending at the called subscriber station TS 1 is given and then deleted as a special bit NEN subscriber station, as a redial identifier in the destination memory when the officer of the calling interrogation set is saved, which means that a redial is not used for either purpose Establishing another connection depending on a time clock device is initiated, dials again or when he or she queries an upcoming call 45 The clock device can be arranged centrally by pressing the query buttons or the time clock space is activated on the basis of a general closing button generated in a known manner for all three of the aforementioned clocks will. "
Switching measures will be carried out by the central control unit depending on the timing unit from

fcmg ZSE requested and when this control part S1 is switched on, the central control device ZSE will change the target 50 over and over again via the subscriber station switch PA to the intermediate memory ZSP of the central units, and with the aid of the control device ZSE in the target memory. Thereafter, the target address present in ZSIl is repeatedly requested by the central control device ZSW via the subscriber station TSn requested, and final search SA the originally called part until an original memory (USnI to subscriber station TSn . By comparison means 55 USnS) this Subscriber station 7 "Sn found free and the central control device ZSE is transferred from the original address of the calling subscriber dem fixed memory FSn of the originally called station TSI there and stored therein subscriber station TSn queried address with which im can be. The rest of the process then takes place as in the buffer ZSP existing destination address of sections I and 2 described, originally calling subscriber station TSl ver 60,

and if they match, the address becomes ⁵ · ^Two subscriber stations call each other independently

from the read-only memory FSl which originally call each other

the subscriber who is now deleting the connection - It is assumed that, for example, dei

point TSI via the central control device ZSE Wadhleiter the subscriber station TS 1 via the Abzur original called subscriber station 7 "Sn 65 ask set A 11 and the guard conductor of the participants fiber wear. This address is the content of the merstelle 7" to existing Sn on the query set Anl Call the original memory of these subscribers mutually and independently of one another, make a comparison and where, with regard to the address, this means that via the interrogation set A 11

11 12

from the subscriber station 751, for example to the originally calling subscriber station, the subscriber station TSn was first dialed and switched through. An interruption of this so-called repetition of messages in the manner described in section 1 takes place - as mentioned in Abeinem the original memory of the subscriber station section 3 - via the central control device TSn the original address of the calling unit ZSE is stored by re-dialing or querying another station and the corresponding ren call, that is, is switched on by actuating a direct call call lamp. The subscriber station button or repeated actuation of the query button or TSi is now waiting for TSn to report. But by pressing the end key. The Taktein subscriber station TSn can be placed on the call lamp direction is centrally located. When reporting again, it is not possible to recognize which subscriber station is calling. Thus, the reporting process is automatically retrieved, so it can happen that the subscriber station disengages, that is, the connection establishment in TSn from the subscriber station 751 - for example, reverse direction is carried out via the interrogation set AnX - is selected automatically,

although there is a call from this subscriber station TS 1 7 direct dialing. 15th

In the case of the transmission described in section 1, each subscriber station (TSl, TSn) is allocated, for example, the original address of the subscriber station TSn from 10 direct call buttons for the two interrogation threads to the permanent memory FSn to a waiting source. When a direct jump memory of the subscriber station TS 1 is activated, the call button uses a converter in the control part S 1 of this subscriber station TS 1 to create a routable wiring in the corresponding to the content of the existing target memory. accordingly the phone number to be dialed directly. This comparison shows that the receiving subscriber station, e.g. B. TSn, rectifier are present gene source address of the subscriber station TSn, a part of the specified by this wiring as the target address in one of the existing target subscriber station, z. B. TSn, is stored in memory, a signal is sent to the central control device ZSE , which identifies the subscriber station being called, which address is converted into a message request by the converter mentioned there. Central control device ZSE is transmitted, at the same time the address of the calling part also corresponds to the subscriber station of the second connection, which is entered by means of key dialing, before deleting the coded subscriber identifier. Transferred via the Zendes target memory ZSnI to the remote station 30 central control device ZSE is also triggered and there the deletion of the desired subscriber station TSη contained this address via the searcher 5 ^ 4 the original memory USIl and the corresponding triggered the call signal. The original address of the calling subscriber

This means that the control center now replicates a reporting of the switching operations written to the called station TSn in accordance with the control device ZSE in section 1. This in turn involves subscriber station, e.g. B. TSn, in the control part Sn indicates that the central control device ZSE also has a corresponding converter, which also consists of the selected destination address of a routable wiring at the subscriber station TSn , in the equal of the subscriber station 751 with the content of the judge according to the code of the Original address jump memory compares and when 40 are inserted, with the original memory associated with the original address the destination memory Neten direct call key is controlled. About this deletes and with the help of the determined original wiring, if at all, a direct call jump address of the subscriber station 751 is present in the original memory of the subscriber station corresponding to the designated calling subscriber, a common blocking switch now - as described in section 2 - the message 45 switched on, which prevents storage in the original process and the connection marking and route jump memory in the event that a through-connection is initiated. Direct election is available. Via the routable wiring

• ¹¹¹¹¹ S wfrd the signaling in the calling party

6. Repeat message subscriber station assigned pir call button

Is switched during an existing 50, for example. This check whether there is a direct call or not

Connection a coupler plug-in unit withdrawn or not, takes place with every call request. From your

another malfunction a connection interrupted, signaling in the direct call key recognize the operation

this way, the pending call request is received from the originally called subscriber at the destination

merstelle, z. B. 7Sn, associated control part Sn the tion. The guard is ready to answer the question

Central control device ZSE requested. 55 garnitur A n \ will query the waiting direct call

- as when reporting - again a connection to so he presses the direct call key of the requesting party

of the subscriber station, whose address is in the subscriber stand. The hoof officer must be in front of the Betl

first original memory OSnX of the subscriber station management of the direct call key in addition to its query

7Sn is stored. press the button. This distinction saves additional

At this point it should be mentioned that in each case 60 keys and still make a difference

When an original memory is released, the addresses of the two interrogation sets are safe. Besides

other, waiting calls in an upstream remains the necessary switching measure for the

Move up another free original memory, so that the watch manager is simplified. To indicate that e

in each case in the first original, which stores a request, it is a reporting process, there is also a]

Jump memory the original address of the longest 65 special identifiers for the wait state to the Zen

waiting participant is saved. central control device ZSE given and thus de

This reporting is dependent on a time backwards establishment of the connection to the waiting:

partial setup repeated until a connection is initiated.

13 14

By pressing this the signaling on the keyboard or by means of the direct call button, the send direct call button is requested via the aforementioned central control device ZSE and via the setting wiring, via which the direct button was controlled, this control device and the corresponding control device, after reporting , according to the searcher, the desired, further subscriber station TSn cut 2 also the original address to the central unit 5 is controlled. At the same time, the address of the sub-control device ZSE is transmitted after it has been sent to subscriber station TSn as the target address in the target memory of the sub-unit (not shown) that has not yet been connected to the subscriber station that is reporting. recipient position saved (see Section 1). Wd-

This original address is in turn used by the control part of the non-controlling the waiting, originally calling subscriber station represented in one of its original subscriber stations, namely the address of the original control that is present in the address of the original control takes place in the address already described above calling subscriber station via the central control mode (section 2). The direct call button signaling device ZSE to the original memory which acts together with the second converter as a desired, further subscriber station TS η transmit memory. 15 and there the corresponding call lamp switched on.

It should also be pointed out that the destination address is the subscriber station originally calling

the called subscriber station in the destination memory of the TSl at the subscriber station TSn as a direct call point

originally calling subscriber station TSl marked, then instead of a storage

has been saved. The target delivery takes place in the original memory and a signaling

As described above, the signaling to the from the permanent memory of the 20 by means of the call lamp

Target superiors this point assigned to the DSS via the central control device ZSE

in reverse direction. took.

From the foregoing it follows that everyone in each case subsequently becomes the central office

Subscriber station and thus each direct call key for control device ZSE released again. Either

the target selection two marshallable multiples as a converter 25 via the interrogation set of the security guard or via

are assigned, namely a multiple for the ab- the interrogation set of the auxiliary officer can then a

outgoing call for the purpose of transmitting the direct reporting of the subscriber station TSn by lifting the

call button assigned, complete destination address to the handset and pressing the query button of the corresponding

Central control device ZSE can be initiated by pressing a corresponding interrogation set.

Direct call button and routable wiring as 30 For calls that are to be queried as a matter of priority -

Converter for activating the direct call button when the call lamp flickers (no direct call)

an incoming call and thus identifies - apart from the answer button, there is a

drawing of the origin of the call request. Emergency button to be pressed if at the same time

As already mentioned above, several waiting calls are pending for each and the urgent call is checked to see whether the one from the central station is not the original one transmitted to the control device ZSE in the query sequence.

address wired as direct selection address in the converter is and thus whether existing and for example by flickering of the subscriber station calling order a direct call key for the selected subscriber call lamp or the direct call key display is available. 40 subscriber station to be queried as a matter of priority

and the participant's origin address

8. Collective connections (conference) and switching _{with the} help of the control unit to the control center

It is assumed that there is a connection between two subscriber control device ZSE via the subscriber station markers and a third, switch-on PA connected to the control part Sn ,
additional subscriber station to this connection is to be switched on at the same time in the control center. It is further assumed, in the direction of ZSE , that it is a connection, for example between the conference connection. The subscriber station TS1 and another, not shown, station TS1 are now controlled and the address of these substages ABC is obtained from the permanent memory via the shown coupling FSn of the subscriber station TSn. It is also assumed that at 50 subscriber station in the target memory of the originally existing conversation, the supervisor with the calling subscriber station TSl in place of the interrogation set A 11 of the subscriber station TS1 at the address of the originally called subscriber station that was not shown to establish the connection of the calling subscriber Reason one for which has been. The control part of the last-mentioned subscriber station is

Is now written in by the third conference signal (not shown) under the influence of the control subscriber station, for example also from the watch part S 1. At the same time, the head, the conference button located there is pressed, marking and route search for the purpose of switching through, so in the subscriber station TSn assigned to this subscriber station, the normal CBA described in section 3 to the originally calling subscriber station is prevented from deleting the existing connection via the coupling stage control part. 60 controlled. This connection takes place independently. This means that in the original memory this is not checked by a free-busy check, ie the subscriber station represented by the subscriber station TSn is transferred to the existing connection by the subscriber station TS1 as the original address of the original parallel check for the originally calling borrowed calling subscriber station remains stored. Subscriber station TS1 switched on.

If the subscriber now selects this not shown 65 Was the originally calling subscriber station

ten subscriber station the call number of a third TSl the station initiating the conference connection,

Subscriber station, for example the phone number who pressed the conference key, is shown in

Subscriber station TSn, either by means of the selection control part Sl of this subscriber station

15 ^V 16

This connection is prevented by a new election.

and a call request to the third participant - who presses the conference button and the third

place TSn by dialing using the keypad or subscriber station has selected before reporting the

initiated by the direct call key. To the original third subscriber station without a final criterion to the In this case, the third subscriber station is more likely to receive 5 originally calling subscribers, i.e. H. without

from the permanent memory of the originally calling connection of positive potential to the C-wire,

Subscriber station transmits its own address directly, so the subscriber station TS1 remains the original

gen. During the outgoing connection establishment is called, is in the waiting state and can respond to the MeI-

on the basis of the conference identification in the destination message of the third subscriber station to be connected

rather wait instead of the address of the originally called 10 TSn. This corresponds to the real mediation

NEN, not shown participant position the address management process.

the other, called subscriber station TS η in the, «» * * _, -.τ.τ ~ λ ι

assigned destination memory. The MeI- ¹⁰ · Activation by pressing the emergency button

this takes place in accordance with Section 2. When reporting the In critical cases, an officer must be one

third subscriber station, e.g. B. TSn, the connection is 15 subscriber station by pressing the emergency button on a

connection backwards to the connection originally called. In one

the subscriber station TSl built. such a case becomes one by pressing the emergency button

Using the subscriber station in this section 8 in the control section with the connection

written hunt group, a selection of a desired subscriber station can also be an additional

notification on the part of the collective connection set-up for the activation of a special one

be carried out at the end of the participant position. Is signaling transmitted at the destination. Because of

such a hunt group corresponding to that of this special identifier is made after the election

first exemplary embodiment on the part of the complete code number and the connection of the

If the subscriber station has been established, the central control device ZSE orders the immediate

stands at the now for the purpose of relaying 25 kierung and the route search for the connection

existing hunt group where the subscriber calling the subscriber station to the desired

merstelle TSn via the C-coupler to the originating subscriber station regardless of the free-busy-

Lich calling subscriber station TS 1 executed the existing state of this subscriber station. To this

Connection is switched on, in the case of the part-way involved, the calling, pressing the emergency button

subscriber stations the following memory status: At the original 30 subscriber station on a possibly existing

Initially calling subscriber station TSl is connected to this subscriber station. Is the

Target memory, the address of the third, zuzugeschal- subscriber station is not occupied at this point in time, see above

saved subscriber station TSn ; also takes place via the central control device

is at the originally called subscriber station and under control of the desired subscriber

in the original memory the address of the original 35 place the activation of a special signal,
calling subscriber station and in the target memory the

Address of the other called, switched 11th inquiry

Subscriber station TSn stored; . _a ) Keep going
at the switched on subscriber station TSn is im

The original memory is the address of the originally an- 40 Assume that according to Sections 1

calling subscriber station TS1 stored. and 2 a connection between two interrogation hardware

During this connection, the other subscriber station, eg TSl and TSn, switched to one subscriber station is released by dialing a new one, there is an interrogation. In this state, the connection Hch calling subscriber station, z. B. TSl, in Zielaus, the original connection between 45 memory, for example ZSIl, the address of the original subscriber station TSl and the not shown called subscriber station, z. B. TSn, feed-in subscriber station exist. chert, while in the first original memory USnI,

In contrast, the originally called subscriber releases the originally called subscriber station TSn

digit who pressed the conference key, the address of the originally calling participant

the 50-digit TS1 is stored by re-dialing, querying or pressing the final key.

Connection off, the connection between the operator of the part and the other subscriber station TSl switched to the subscriber station TSl, the hold button will not exist in TSn . In this case, the originally shown way has looped the connec- ohmiger resistor in the pilot wire c, in which the borrowed, called, not shown subscriber station, 55 holding windings of the coupling relay are, a highly soft has pressed the conference button, whereby the connection for the originally calling subscriber station this connection actuated coupling relay to waste TSl be brought to the third connected subscriber station. At the same time the deletion of the TSn is mediated. original connection when re-elected through details

If, on the other hand, the originally calling, to use dial buttons or subscriber station TS 1 mediating through the direct call button, prevents the connection by redialing, canceling or checking an incoming call question or pressing the closing button. Since the out now in the target memory ZSIl, there is no longer a connection, since the address of the originally called subscriber both the originally called TS η ( not shown) remains stored, an additional auxiliary subscriber station and the connected subscriber 6 ₅ target memory HS 1 for the production of an additional station TSn via the same coupler with the original outgoing connection - for example, initially connected to the calling subscriber station for the purpose of inquiry - in which the target addresses are stored for the new connection

cno /.Ύ) ΙΎΆ

can. The new connection comes according to the in sections 1 and / or 2 - depending on whether there is is an outgoing or incoming call - the manner described.

In parallel to the processes described above, the switching off of the coupling relays in the control part Sn of the originally called subscriber station in and of itself identified a fault in the existing connection. In this case, however, no repetition of the report is initiated, because due to the special identifier via the c-wire in the control part Sn of the originally called subscriber station TS η, a special signaling from the control part Sl of the subscriber station pressing the hold button is triggered in such a way that the originally called according to section 6 repetition of the report is prevented. The address of the originally calling subscriber station TS1 also remains in the first original memory, for example USnI, ao

If the hold button is now pressed for the second time at the originally calling subscriber station TS 1, this triggers the established second connection, for example an inquiry connection, and according to section 4, a redial is initiated by the originally calling subscriber station. This means that with the aid of the address of the originally called subscriber station TSn present in the target memory ZSIl of the interrogation set A 11 and with the help of the central control device ZSE, a renewed activation of the originally called subscriber station TSn is initiated .

If this subscriber station TSn is determined via the searcher, the original address is requested from the permanent memory FS 1 of the originally calling subscriber station TS 1 and compared with the content of the original memory (USnI ... USn3), as described in Sections 1 and 2 getting produced.

If the last connection made is deleted, the blocking of the message repetition is lifted. This means that due to the original address in the original memory, the Connection to the originally calling subscriber station is restored.

12. Cross-connection traffic

In the preceding part of the description, reference is made to cross-connection traffic and the possibility of to dial a private branch exchange and beyond this latter into the public office, yet not received. This is done below, but only to the extent that this is for general understanding necessary is.

For the time being, however, it should be pointed out that when the connection is switched through the control parts Sl and Sn via only indicated auxiliary wires SL 1 and SLn, which are also connected together via the switching network, signals, e.g. B. also the final signal are transmitted.

For every possible cross connection direction and also for traffic to the private branch exchange and Separate bundles of channels exist via the latter to the public office. Any direction is selected in a known manner with a direction code.

The drawing shows a transmission Uep of the cross-connection line QLpIR 1 in the direction R 1 and a further transmission Uem of the cross-connection line QLmIR 2 in the direction R 2 . Like the subscriber stations, the transmissions are controlled via the central control device ZSE , but via a separate transmission finder SUN. In the case of request incentive issuance through an incoming busy transmission, the transmission

45

that, since in the originally called subscriber switch SEG the connection of the central station TSn is an assignment of the original memory control device ZSE. For multiple transfers

together registers Reg which can be connected via a register coupler RK are provided.

Each transmission is only a source store, e.g. B. USp to Uep, and a priority memory, e.g. B. PSp to Uep assigned. Destination memories are not required because a transmission does not select any subscriber station by itself. The original memory always takes on the address of the calling subscriber station, both in incoming and outgoing traffic. An identifier for the value of the system from which the transmission (incoming or outgoing side) is assigned is recorded in the priority memory PSp.

A transmitter SE for the forwarding of the dialing codes and an original memory US and a priority memory PS are also provided in the register as intermediate memories. The original memory US and the priority memory PS give their received information to the corresponding, activated transmissions. The address of the selected subscriber station recorded in the destination memory ZS is made available to the transmitter SE for forwarding the dialing code. The adjuster can now set up an incoming connection as required for the internal connection, or an outgoing connection can be set up accordingly.

to the waiting interrogation set, z. B. A nl, is still registered, a connection to the correct interrogation set A nl is guaranteed.

This interrogation set is identified via the central control device, so that a connection can be made via the marker and the path finder WS between the interrogation sets -411 and A nl of the relevant subscriber stations JS1 and TSn to be coupled.

b) Incoming hold

If the hold button at the incoming called subscriber station is actuated by the speaking officer during an existing connection, the coupling relay is also triggered. The switching status for the message repetition described in section 6 is created again. This repetition of the report is temporarily prevented. At the originally calling subscriber station TSl, the address of the called subscriber station TSn remains stored in the destination memory ZSIl.

On the part of the originally called subscriber

1 sheet of drawings

Claims (5)

Λ Participant taxation, where with the help of a Claims: Central control device via a corresponding Koppclnetz with an outgoing connection a 1st method for establishing a connection in connection establishment in each case by one of a telephone switching system with an operator stations designed as a 5 other desired subscriber station, switching measure of the calling subscriber station initiated with the help of a control center and with an incoming connection control device via a corresponding Kop- through another calling subscriber station pelnetz with an outgoing connection one of several waiting subscriber stations determine connection establishment in each case by an io mende switching measure of a waiting call other desired subscriber station determining receiving called subscriber station switching measure of the calling subscriber - a connection throughput is initiated ,
initiated and when there is an incoming connection can be made by another calling division, which for example also allow the subscriber station of several waiting subscribers to be used in the air traffic control service. Telephone traffic necessary. This called subscriber parts a connecting accessibility was is caused in the past with Hiffsdurchschaltung, characterized facilities overall, including Rufausscheidung, preferably wise indicates that the deletion of an on 20 call assignment, parallel connection of lines ringing status at the calling and the arrival _un d service line connections to increase called subscriber station (751, TSn) from the searches. In large control points - in order to achieve this calling waiting subscriber station (TSi) goal - additional manual exchanges had to be carried out through a switching measure. However, this was at the expense of the first the destination address of the called part overview at the switching stations. In addition, the subscriber station (TSn) from the target memory (ZSIl) did not always seem to be able to carry the additional switching time operationally for the calling subscriber station (751). If the dialing switch control of the called subscriber station is designed in such a way that an unrestricted accessibility (TSn) to the central control facility (ZSE) and accessibility of all workstations and all connected lines is the origin address of the calling lines without the involvement of the switching station (751) for the purpose of comparison with people is possible, then the special conditions of the called subscriber station (75n) that occur in the air traffic control service are stored, the call signa! controlling characteristic _{to be} taken into account. In such systems must be ensured borrowed nämzeichnung to the called subscriber station that each air traffic control (TS n) transfer and cancellation of ISIN ₃₅ officers in place any time the overview is made on drawing. has the pending connections, and he has to 2. The method of claim 1, characterized _ze overall it can produce each compound. It also indicates that, due to the deletion of the, it must be ensured that the connections in the identification of the original address to the dependent on both the calling and the called Tcilnchrncrsielle (TSn) can be made by over 40 called parties, that is, the central control device (ZSE) in return that both the calling as well as the called upward transmitted identifier must give the position a declaration of readiness for the connection deletion of the target address in the target memory (ZS 11). Thus, no subscriber station calling any subscriber can be initiated by the central station at will with another subscriber control device (ZSE) . ₄₅ merstelle contact, but it is in 3. The method according to claim 1, characterized in each case both switching measures of the calls, that the deletion initiated as well as switching measures of the called sending switching measure from a new selection in the subscriber station are necessary. Because of this, are Waiting condition exists. the workstations only the status information, 4. The method according to claim 1, characterized in particular the signaling of waiting calls, indicates that the person who caused the deletion should be offered. Parallel signaling from others Switching action from pressing a query button Places must not occur. Only when the anan one of the one of the calling subscribers - called workstation - is able and ready to handle the to accept the assigned answering set when there is a waiting call, should be done by a the waiting state exists. 55 special switching measure the connection is established 5. The method according to claim 1, thereby brought about. indicates that the cause of the deletion is the object of the present invention send switching action from a final key in it, in systems of the aforementioned type with gerruck at the waiting, calling subscriber-like effort the deletion of a at a job consists. 60 called subscriber station pending call signal to control. This is achieved in that to delete a call status on the calling and the called Part of the subscriber part of the calling, waiting subscriber station has a switching measure. The invention relates to a method of being taken, by which first the destination address of the Connection establishment in a Fernsprechve.rmitt- called subscriber station from the target memory management system with the calling subscriber station to the control center expanded as a switching station