DE2037400C3 - Arrangement for overlay subscriber systems - Google Patents

Description

be drawn. The separation of vcrstmcucncn - ««. », ...« ._—. - "

Transmission channels takes place in the office and at the part and their meaning is shown

by interposing crossovers

z. B. of low-pass filters for the voice-frequency location and · —— transmission line between office and

High passes or band passes for one or more participants

additional carrier frequency channels. 65 voice channel

The signal transmission between participants and an additional, carrier-frequency channel

Office takes place in the voice-frequented way in conventional »Fxs carriers for the outgoing from the office

licher way by direct current or tone dialing, for direction

Fsx carrier for those arriving at the office

direction

ML transmission line between office and

Attendees

TL low pass filter

TH high pass filter

T. \ s Bandpass Feeder for Fxs

Tsx band pass feeder for Fsx

TR transmitter for carrier-frequency signals

RC receiver for carrier-frequency signals

HY hybrid

SC call converter

SD ballot receiver

LS marker

CSU channel converter

SH ⁷ I, first and second coupling stages
S Wl

JR connection kit

OC voice-frequency transmission channel

AC carrier frequency transmission channel

It can be seen from FIG. 1 that the voice-frequency signals are separated from the carrier-frequency signals by means of a low-pass filter TL and are fed directly to the first coupling stage SWi via the line OCa. A dial receiver SDa sets a marker ZS.

The carrier-frequency transmitted signals are separated from those in the voice-frequency position by means of a high-pass filter TH and the additional transmission channel AC filtered out in this way is fed to the channel converter CSU. This performs demodulation and modulation, and its voice-frequency input is connected to the first switching stage SW 1 via a two-wire line OCb. To establish a connection in the exchange, the additional carrier-frequency transmission channel is equal to a voice-frequency one. The dialing symbol receiver SDa used is also identical to the SDa of the voice-frequency transmission path. In the channel converter, the two transmission directions on the subscriber line side ML are separated by bandpass filters Txs and Tsx , which replace the high-pass filter TH , and on the office side by a hybrid circuit H Y. The transmitter TR and the receiver RC perform modulation or demodulation. The call converter SC influences the transmission path with the carrier Fxs.

It can be seen from this that with such a structure a channel converter CSU is required for each additional carrier-frequency transmission path.
Fig. 2 now shows the structure of the invention

ίο Overlay Participant System. The voice-frequency transmission channel OCa here corresponds to that of the known systems.

In contrast, the additional carrier-frequency transmission channel AC is supplied without prior implementation of the first stage switch SWl in which, as stated earlier, a concentration by a factor of m done. Thus, if η additional carrier-frequency transmission channels are connected to the office; facility, only njm connection paths are required for this at the output of the first switching stage SW1. The number of required n channel converters is thus reduced by a factor of m

The first switching stage SWl is divided into part SH ⁷ Ia for subscribers with the usual language

^Ä 5 frequency transmission and in part SWXb for the additional with carrier frequency transmission. For each additional carrier-frequency transmission path, a signal receiver is also required, which consists of a filter Tsx and a carrier detector CD , and through which the dialing signal receiver SDb is controlled. This signal conversion is extremely simple, so that the arrangement according to the invention results in a considerable reduction in effort.

In the previous. Description is for the additional The carrier-frequency transmission path is always a carrier-frequency two-wire separation transmission was presupposed by language. Needless to say, the The same principles are also applied to bidirectional telegraphic or data transmission can be.

1 sheet of drawings

Claims (1)

¹ the additional, carrier-frequency channels ζ. Β. by Claim: ^A ηΓαπ !? Snd "jSSSrn * additional carrier frequencies γ Γ «! facilities located in front of Koppilst Arrangement for Überlagemgs-Teünehmer-Sy- ** ™ Τ * L · $ dialing characters in DC characters stars, in which on a subscriber line, the 5 order and ^ _{carrier-frequency} message through voice-frequency message transmission channel umsew π ^ _{g hban} d | convert _{age back} Implement one or more additional transmission channels in the _direction through modulation on m in the carrier-frequency position after the two-turn or m ^ _Uge . -Division principle are superposed in which α = ^ ^ _{n from} signalernpfänger, signal transmitter in front of the switch facilities for connection io "" f ^, _setter f _ör both Übertragungsnchtungen, low- construction and carrier-Ubertragungs- UNU μ _{Zeicbenumsetz} e _r and a ^a '* ° are _nd n _forming an electrical and structural unit separated from each other by Sprachumkanäle overall crossovers and in which each setter trägerfrequen- u. ^ _K o _ppe lstufen are thus in the pray from each of an outgoing and a come the rurai _{s also the} carrier-frequency the direction existing transmission channel pair 15 * »_ nwn 'is assigned to _{simple speech bubble} hfrequente Übertraein channel converter which Einnch- JJ ^ Jf ¹ Another requirement for the implementation of the language and 8 "Ig" ** ' _is that several operating symbols such as operating criteria, election symbols, "*," _ufen are connected in series in an office, with the Contains callsigns etc., thereby marked κορρ _{dne concentration} takes place and the draws, d * 3 of the implementation of the beie * o ers en ¹ ^ _{fen eventue} ll also have a further criterion and the dialing characters ^we '^ ⁿ , ™' _{ΚοηζεηΐΓ3} ιίοη can have. When signal receiver electrically and spatially from the ubri- ^zuaiz "coupling stage a concentration factor is gen, the implementation of the language serving channel now the first -J ^ _{mf ffl / 4 outputs} nd _ix for m sub-converter (CSU) separately, that each one of from 4 η ai, Signal receiver parallel to each incoming overall 25 "™ ^{e" e nc "u} Jf _before ii _eg end the invention is directed at the carrier-Obert narrowing channel overall Γ ¹ '" * "topsheet Happenings subscriber systems, is likely that the remaining channel converter (CSU) only known ^. _eilne ™ ^B _hmerleitung the sprachfrenach Verbindungskonzentratiou in a first Aene _{hrichtenQbertra} g _Ung skanal one or sev- Coupling stage (SM ^ l) is arranged and that the Μ »" ΐ «η transmission channels in carrier-frequency first Koppelstufv [SWl) in subscriber connections 30 rere ^to ^ ™ ^e _the two-wire separation principle for low-frequency (SWXa) and those for trager- tor location and ^^ ^ ^ _{n office facilities} frequente (SWIb) transmission .. is divided. J ^ "!" Connection establishment low and carrier-free constant transmission channels through crossovers ₃₅ are separated from each other and in which each carrier frequencies from one outgoing and one incoming ^dir ^ | ^^^^^ The present invention relates to an arrival ^ P * "'™ ^ rUnSiuS ^ ei ^ anguage and order for overlay Teiinehmer systems at SETUP ^ ™ nts 1 _skriterjurn, election signs, which the subscriber line between office and remote 40 Ι ^ ζ ^ ^ ΖΖΆ η if in the Official coupling subscriber except for the low overall 3 ^ ^{1C "e} _r v _erbindungsko nzentration are provided, nor Among lavish interiors for one or more other message ^{st» [s} \ n ™™ ™ find by which uses a considerable amount of transmissions in a higher frequency range ^ JJ ^ ™ j £ _e Üel _t . will- , · . _AC η; * «· Aufeabe is indicated by the claim Such systems are known per se, and two of them _solve ^{45 dies} * ^Α "'| ϊ *." 1 "" »Nd described in:» Technische Mitteilungen der ^^ ^{ηε E} ^ Snf is made using the PTT « (Switzerland), Issue 1/1968,» Subscriber-Carrier- "" ™ * 1 ^ ™ ^ _οη through coupling stages one frequency system SA2-T «, and in:» Bell Laboratories ^ {^ g, ^ at the channel converters Record «, December 1967,» A carrier transmission ^ ^I ^ _n ™ Nahrungsmittel £ _trie bBaichenausicherung and System for customer loops «. ⁵ ° £ u cn 1 rci ^ ■> e In such a system, the first Te, J-parlance uses "" Jt ^ _hand ^ _figures ^ taker the galvanic line in conventional ^. _r | ₃ ,? TPrt will be showing it Way to transmit messages in the voiceband. going e J »^ JJnuJ _g * J« g _{the state of the} One or more additional transmission channels are shown in FIG formed by pairs of carriers Fsx and Fxs , the z. B. 55 nik embodiment of the invention, be modulated with speech. £ * _d block diagram of the amtssei