CH625927A5 - Data transmission device to connect a plurality of subscribers to a central exchange - Google Patents

Description

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PATENT CLAIMS claims 1 to 10, characterized in that the remote

1. Message transmission device for connecting the active device is part of a monitoring device of several subscribers with the subscribers assigned to the multiplex transmission device.

Connections to a central switching center, the 12th message transmission device according to one of the

Channel number of the transmission device is smaller than the number of 5 claims 1 to 11, characterized in that the mediated

number, characterized in that a frequency multiplication switching device (13) between the limit switches

plex multi-channel transmission device (16,17,18; 26,27,28) gene (12) and the converter devices (16,17) of the

with an exchange-side and at least one subscriber-side terminal (1) are arranged.

is provided on the far end (2), and that an allocation device 10 claims 1 to 12, characterized in that by means of the

(23) for the optional connection of subscribers with a frequency division multiplex transmission device, at least two of the channels of the multi-channel transmission device (16, 17, 18; bundles of channels are transmissible, and that the channels

26, 27, 28) and to the exchange-side terminal (1) one of a bundle within at least one assigned

Switching device (13) for selectively connecting the channels to group of subscribers can be allocated, and that for all are connected to a switching device (11), and 15 channels have a common remote control device and / or center

that a central control device (14) is provided in the independent control device.

the switching device (13) directly and the allocation device (23)

can each be controlled 20 with the aid of a remote control device (15, 25).

2. The message transmission device according to claim 1, the invention relates to a message transmission, characterized in that the allocation device is designed as a supply device for connecting a plurality of subscribers to a switching device inserted between a subscriber and a connector assigned to the subscriber and a converter device. 25 switching center, the number of channels of the transmission

3. Message transmission device according to claim 1, direction is smaller than the number of participants.

characterized in that the number of subscribers to be connected can be used to connect subscriber stations to a

Subscriber (Tl ... Tp) at a subscriber-side terminal (2) central switching center multiplex transmission equipment

is at most equal to the number of channels that can be allocated and that provisions with fixed or need-based channel allocation are provided,

the allocation device (23) as one between a carrier 30 A channel allocation, if necessary, can be particularly important

Supply device (21) and a converter device prove to be expedient if the savings caused thereby

(26,27) inserted carrier switching device is formed. transmission capacity for a significant

4. Message transmission device after one of the wall reduction leads.

Claims 1 to 3, characterized in that the participants are the maintenance of a central switching device mer (Tl ... Tn), and that as a transmission 35 also for large-area subscriber networks compared to a means for dialing information, counting information, dial tone, distribution in smaller decentralized units the advantage that

Ring tone, busy tone and / or other switching-related switching devices can be used

Indicator of the assigned channel is provided. and the network structure largely when the network is expanded

5. Message transmission device according to one that is retained.

Claims 1 to 4, characterized in that the participant 40 object of the invention is a message transmission

mer (Tl ... Tn) are telephone subscribers, and that as a transmission device for connecting several subscribers with means for the criterion of seizing, triggering, the subscriber is to be trained in a central switching center such that the number and / or channel number in each case the telecontrol unit - Connection between the subscriber and the operator is only provided if the device is used. Is created, by allocating one of the

6. Message transmission device according to one of the 45 channels still free at this time. The subscribers can have claims 1 to 5, characterized in that for each subscriber there are in particular telephone subscribers or subscribers in the exchange-side terminal (1) and in the subscriber of a data network.

end station (2) an optional end circuit (El ... Ep; According to the invention, the message transmission

E 'l ... E'n) is provided. device designed such that a frequency division multiplex

7. Message transmission device according to claim 6, 50 multichannel transmission device with a mediation-characterized in that between the mediation-side and at least one subscriber-side terminal there is a selectable end circuit (12) and the central control unit, and that to the subscriber-side Terminal a device (14) a call integrator (10) is inserted. an allocation device for the optional connection of

8. Message transmission device according to claim 6, participants with one of the channels of the multi-channel transmission, characterized in that between the subscriber-side 55 transmission device and to the exchange-side terminal an optional end circuit (22) and the telecontrol station (25) switching device for the optional connection of the Channels with an integrator (20) for dial pulse suppression is inserted. a switching device are connected, and that with

9. Message transmission device according to one of the help of a central control device depending on claims 1 to 8, characterized in that a signal switching and / or subscriber-side demand criteria and transmission channel that the stations (15, 25) of the telecontrol 60 from the occupancy state of Route connects the switching device direction in conference call, a channel of the multi-channel message of a remote control device that can be controlled by the direct and the allocation device, each with the help of the allocation. The number of channels on the transmission device (16.17; 26.27) is. the individual sections can be the same or

10. Message transmission device according to one of the different.

Claims 1 to 9, characterized in that the telecontrol 65 can be improved by means of these measures for combined call and incentive operation by using the transmission capacity of the carrier frequency part. achieve subscriber systems. There is also the advantage

11. Message transmission device according to one of the channel assignment as required without any noteworthy one

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handle in units of common frequency multiplex transmission cable quality only allows the use of small channel systems

equipment is feasible. The additional facilities to, but not the use of systems with high

tations can largely be made up of building units. The intended number of participants is so large

that are from the range of devices used for conventional communications technology, so that with fixed channel allocation, several small channel systems can be found in equipment. For the over 5 would be required.

transmission line, any transmission media, such as b) can be used for subscriber detection along a line with overhead lines, cables, directional radio. The sub-baseband range is available to several subscriber groups. In a further embodiment of the invention, the addition of a broadband radio system or the accessory pack of a Kolungseinrichtung is available as one between the subscribers and an axial cable. The switchgear device, which can be reached in this way, is less than the intended number of participants. With fixed det. Such an embodiment is particularly useful in the case of channel allocation, at least one further radio relay or should be expedient for the number of cable systems to be connected to be used at a terminal.

transmit subscribers greater than the number of assignable channels c) narrowband must be available for subscriber registration, but it can also be used at end stations with radio relay systems, since frequencies for a smaller number of subscribers to be connected are not available . Find when the channel is fixed. division would need two or more parallel radio relay systems

In a further embodiment of the invention is used in an end.

place, for which the number of subscribers to be connected is high. The allocation device is explained in more detail with reference to the number of channels shown in the figures. Show it:

as a carrier switchover device inserted between a carrier supply device and FIG. 1 a switching-side terminal and a converter device, FIG. 2 a subscriber-side terminal of a multi-channel

trained. The carrier switchover device, the preferred message transmission system, each with additional device

wise is a controllable carrier switching matrix, can be integrated into a necessary channel allocation.

rather form and insert, with each transmission card. The switching-side terminal 1 shown in FIG. 1

nal only a discrete frequency needs to be switched. 25 contains the channel converters 16 and 17, which are connected via the converter 18

One can transmit the message transmission device for a higher-channel transmission system to the trades in the event that the subscribers are telephone subscribers, route 3.

The low-frequency connections of the channel converters are formation, counting information, dialing tone, ringing tone, busy tone and / via the switching device 13, which is designed as a controllable LF coupling or further switching characteristics of the 30 fields in each case, to the End circuits El to En the allocated channel is provided. middle-side limit switch device 12 out.

On the other hand, one can expediently as a transmission. The channel converters 16 and 17, including the means for the criterion of occupancy, triggering, subscriber signal channel, have six-wire connections and the switching device number and / or channel number. 35 sets. With the help of the limit switching device 12, the transmission from six-wire to two-wire transmission is created in such a way that by means of at least one of the optional end circuits E '1 of the frequency division multiplex transmission device to E 'n, each of which is permanently assigned to one of the subscribers, two bundles of channels can be transmitted, and that the end circuits are channels of a bundle within at least one assigned 40 E' 1 to E 'n with the subscriber circuits AI via the two-wire connections a until can be allocated to the group of participants, and that for all switching device 11, which is a terminal switch, connected channels a common telecontrol device and / or send.

central control device is provided. The central control device 14 is via the call integration

These measures advantageously result in a gate connected to the end circuit E '1 to E'n and receive multiple use of components of the remote control device 45 from the switching device 11 via the lines c device and / or the central control device. In particular, the integrated call signal as a criterion for a connection request coming from the central station of the telecontrol device in time-multiple switching.

plex operation the desired allocation of channels within the central control device 14 is with the central station of several channel bundles. 15 connected to a remote control device. The central station 15

The multiple use results both in the case 50 is to be assigned to one of the assignments via the crossover 19

that the channel bundles run separate transmission links from the switching center via the channel of the multiplex transmission device, as well as in the event that the central station connects to the other stations of the telecontrol device shown in FIG. 1 not that they are guided via a common transmission path,

will. The central control device can in particular be used as a micro

In addition, there is the case that route computers are designed.

cuts with joint transmission of several channel bundles The central station 14 exchanges over the in conference

are present, the advantage that the common signal channel of the telecontrol system switched on this route section

If one and the same signal channel of the telecontrol system provides multiple directions of information with the other stations, in particular

other bundles, each with its own channel allocation. in particular by coded transmission in time division multiplex

Further advantageous refinements of the invention are produced. It can work in the call mode, i. H. such that the result from the dependent claims. Central station 14 calls one substation after the other. Requires channel allocation in the case of TF multichannel systems and causes messages and / or commands to be issued. It is particularly advantageous when the speech circuit is particularly expedient, it proves that a remote number of participants working according to the number of economically usable transmission systems for the so-called calling and incentive procedures is not sufficient. 65 to use the active device in which a special cycle in the polling cycle results in the following cases: there are gaps in the jump time that are available to the substations a) an existing one can be used for subscriber detection, if there is one that is too metric to the central station Cable or an overhead line can be used. The telecommunications message to interrupt the call cycle on its own initiative

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and submit reports. The central station expediently calls the substation individually and specifically as required. When using a flexible telecontrol system for information exchange, the substations and the central station can be adapted to different configurations of the subscriber network.

With the help of the telecontrol device, the criteria of documenting, triggering, subscriber number and channel number are transmitted. In addition, the remote control device can be used for route monitoring, other remote control purposes or the like.

The crossover 19 serves to use the channel excluded from the allocation at the same time as a signal and as a service channel. It may be omitted, in particular if an independent channel is provided for the service and / or a telecontrol system is used that does not allow a service channel and the signal channel to be accommodated together in one and the same NF channel due to bandwidth or if no service channel is required .

The subscriber-side terminal shown in FIG. 2 is connected to the transmission link 3 via the coupler AI. The coupler creates a low-reflux connection between the three four-wire paths. The end points for further subscribers Tprl ... Tn are not shown in the figure.

The two-wire lines coming from the subscribers T1, etc. are routed to the subscriber-side optional end circuits E1 to Ep of the end circuit device 22, which establish the transition from two-wire to six-wire connections. With the help of channel converters 26 and 27, twelve LF channels are combined to form a primary group. With the help of the primary groups, a transmission band of a higher number of channels is formed in the further converter device 28.

Other services can be transmitted with the help of the multiplex transmission device in parallel to the assignable channels, e.g. B. data, TF sound or the like.

The channel converters 26 and 27 are guided to a converter device 28 of the higher-channel multiplex system, which is connected to the coupler AI.

The channel converters 26 and 27 each contain modulators for converting the LF bands into the pre-modulation position 48 to 52 kHz. In a second stage, the bands are converted into different frequency positions. Because the carrier supply device 21 is routed to the modulators of the second converter stage via the allocation device 23 designed as a controllable switching matrix, one of the frequency positions within the primary group can be assigned to the individual subscribers. The converter devices 18, 28, 16 and 27 can be omitted if a 12-channel system is used instead of the higher-channel transmission system.

The allocation device 23 is connected to the station 25 of the telecontrol device, so that the control commands given by the central control device 14 and transmitted via the telecontrol device trigger the desired assignment in the subscriber-side terminal.

In the optional subscriber-side end circuits El to En, the dialing pulses coming from the subscriber are decoupled and fed to the station 25 via the dialing suppression device 20 and transmitted to the central control device 14 via the telecontrol device, which is thereby prompted to establish a connection for the calling subscriber.

The central control device 14 connects the "calling" or "called" subscriber depending on the occupancy of the

Transmission path 3 via any of the still free channels with the switching device. The transmission band of the multichannel transmission device represents a «telephone bundle with complete accessibility» at all end points.

In order to be able to control the channel allocation depending on the occupancy status of the transmission link 3 and the subscriber collective, the following criteria are constantly monitored in the central control device 14:

a) The criteria for each participant or address, i.e. no loop closure,

occupied by participant i.e. «Walking»

evidenced by mediation i.e. "Coming".

b) Free per transmission channel,

activated on the subscriber side,

switched on on the exchange side.

If none of the transmission channels is free, two cases can be distinguished depending on the origin of the connection establishment:

a) Document incentive from one of the participants T1 to Tn: The participant does not receive a dialing tone, hangs up and tries again after a certain time.

b) Incentive to receive documents from the operator: The central control device 14 simulates a loop closure or the “busy” state in the direction of the operator for all still free subscribers: the remote subscriber therefore receives 1 busy signal from the operator.

The mediation criteria

Document and

Triggers are transmitted in the exchange-side terminal 1 directly or from a subscriber-side terminal 2 to the central control device 14 via the common drawing channel provided by the remote control device.

The additional waiting time caused by the channel allocation between lifting the handset and receiving the dial tone depends on the properties of the remote control device used. This waiting time can be kept sufficiently short with the aid of a fast telecontrol device, in particular with a combined incentive / interrogation method.

After allocation of the transmission channel, the criteria

Dialing characters,

Call,

if necessary, transmit charge impulse by means of the speech-channel-specific signal channels present in the TF transmission system, which can be in-band or out-of-band channels.

The criteria dial tone,

Ringing tone,

Busy tone is fed into the voice band of the assigned channel by the operator.

For longer multichannel subscriber lines, transmission of the remote monitoring and control characters, which is protected in sections, can be advantageous, in particular by means of a 1: 1 LF switchover device. The alternative route can be carried out via any second NF or TF connection.

A distinction must be made between two cases with regard to establishing and clearing the connection:

1. The participant under consideration is A participant (calling).

2. The participant under consideration is B participant (called). A preferred way of channel allocation and activation is as follows:

4th

5

10th

15

20th

25th

30th

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1: connection establishment by subscriber,

1 a) Channel allocation: take off, i.e. Longer loop closure is recognized by the associated subscriber-side limit switch and the integrator 20 for suppressing dialing impulses as an incentive and communicated to the central control device 14 together with the subscriber number 5 or address via the telecontrol device. The integrator 20 provides a time criterion; if the incentive to vouch for a long time, e.g. Is interrupted for 10 s, then the "channel allocation" incentive is canceled. 10th

The central control device 14 searches for a free transmission channel and, via the telecontrol device, issues the command “switch on subscriber” to the allocation device 23 of the subscriber-side terminal 2.

When the subscriber side is switched on, an acknowledgment 15 goes to the central control device 14 and initiates the command in the terminal 1: “switch on the subscriber line on the exchange side”.

The connection between the switching facility and the subscriber is now established; all other mediation-related criteria, namely dial tone, dial tone, ring tone, busy tone, charge impulses are transmitted via the allocated channel.

lb) Activation of the transmission channel: A «hang up», i.e. a longer loop break at the subscriber, 25 is recognized by the subscriber end circuit and the integrator 20 for suppressing dialing pulses as a triggering incentive; the message “subscriber has hung up” goes to the central control device 14.

The central control device 14 issues the command “activate channel 30 on the subscriber side”.

After receipt of the "Channel free on subscriber side" receipt

the channel is disconnected on the exchange side. The central control device 14 then stores the information “channel free” for the relevant channel.

A transmission channel is therefore only released again by hanging up the subscriber. This also applies to the establishment of the connection by the operator (case 2).

2. Connection establishment by the switching device; considered participant is B participant,

2a) Channel allocation: The “Incoming call is called” voucher incentive is obtained from the call signal (25 or 50 Hz) coming from the operator using the optional end circuit; the pauses between the call periods are suppressed by the call integrator. The document incentive thus obtained is given to the central control device. If the switching incentive provides the incentive directly, the call integrator can be omitted.

The central control device 14 searches for a free transmission channel, issues a switch-on command to the substation assigned to the subscriber via the telecontrol device, the subscriber is switched to this channel; a corresponding receipt goes to the central control device 14.

The central control device 14 switches the channel through on the exchange side after receipt of the acknowledgment; the call goes to the subscriber via the assigned channel.

The participant takes off; the loop closure is evaluated as a holding criterion for the allocated channel; If there is no call or no loop closure for a long time, the channel is activated again by the central control device.

2b) Activation: As in case lb), the transmission channel is activated by hanging up the subscriber, i.e. by interrupting the loop.

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1 sheet of drawings