FR2537819A1 - OPTICAL INPUT DISTRIBUTION - Google Patents

Abstract

OPTICAL INPUT DISTRIBUTOR CONSTITUTING THE JUNCTION BETWEEN AN URBAN NETWORK AND THE CENTRAL EQUIPMENT. THE OPTICAL INPUT DISTRIBUTOR IS CONSTITUTED BY AN ELECTRICAL COUPLING PANEL 1, WHICH ALLOCATES 64KBIT CHANNEL MULTIPLEXERS TO A MIC 30 SYSTEM AND A MIC 30 SYSTEM TO A MIC 1920 SYSTEM WITH ONE LINK, AND BY A SECOND CHANNEL PANEL DOWNSTREAM OPTICAL COUPLING 2, WHICH MANAGES SEVERAL OE OPTOELECTRONIC CONVERTERS AND LAMBDA L-MUX MULTIPLEXERS, A SEQUENTIAL SWITCHING OF COUPLING PANELS 1, 2 CONNECTING THE OPTICAL ASLS LINES TO THE TERMINALS OF THE VARIOUS CONTROL SYSTEMS AND WIDE BAND OR BB, BB OR BAND SWITCHING SYSTEMS SB.

Description

The present invention relates to an optical input splitter,

  constituting the junction between urban cables and

  coming from all directions of an urban network and the equipment

central office.

  No applicable solution was so far known to gather information flows from various services on the Internet.

optical subscriber line.

  Previous solutions only provide drivers

  in the input splitter and only have

  fixed allocation mechanical tributions The known input splitters are therefore very large because they have a number

  important elements assigned to the subscriber.

  The subject of the invention is an optical input splitter

  with only a few items permanently assigned to the subscriber.

  It significantly reduces the necessary components.

  According to an essential characteristic of the invention, the

  optical titler is constituted by an electrical coupling panel, which assigns 64 kbit / s channel multiplexers to a PCM system and a NIC system 30 to a system 1920 of a link during the duration of the latter, and by a second downstream optical coupling panel, which manages several optoelectronic converters and lambda multiplexers also assigned to a link during its duration, a sequential switching of the coupling panels connecting the optical lines to the terminals of the various switching systems to

broadband or narrow band.

  Other features and advantages of the invention will be

  better understood using the detailed description below of a

  Embodiment and accompanying drawings in which: Figure 1 shows the block diagram of the optical input splitter; Figure 2 shows the coupling device; Figure 3 shows the sequential coupling devices; and Figure 4 shows the integration of narrow band services

and broadband.

  The optical input splitter represented in FIG.

  consisting of two coupling panels 1, 2.

  The electrical coupling panel 1 comprises multiplexers which assign a 64 kbit / s channel to a PCM system 30 (pulse code modulation system with 30 channels) and, in the case of additional broadband services in dialogue mode, a MIC 30 to a PCM system 1920, during the duration of a link A second downstream optical coupling panel 2 manages several converters

  optoelectronic O / E and X-MIUX lambda multiplexers in the same way.

  A lambda multiplexer is a device for distributing information between optical links operating at lengths

  different optical waveforms The sequential switching of these

  Coupling rings cover all Asls optical lines and the terminals of the various broadband switching systems or

  narrowband of each subscriber in the various central offices.

  The elements of the electrical coupling panel 1 and the optical panel 2 shall be considered as a reserve for the establishment of a link, which is assigned by computer and control instruction to the link during its duration, that is to say that almost all

  the elements of the optical input splitter are available inde-

  from the subscribers and not as in the prior art affected

  subscribers; the assignment is ensured by a calculator

  Manual tribution is no longer necessary.

  As shown in Figure 2, all incoming lines, sup-

  in multiplex spatial and from a central narrowband X, are combined in PCM systems 30 to reduce the number of lines of the input splitter This arrangement can divide

  by the numbers of lines and furthermore to process information flows.

  in the time frame, which facilitates the use of

with a high degree of integration.

  The free PCM timing at the output is determined using a time slot identifier (TSAC) and a scanner (SCAN) assigned to each PCM system.

  scanner is used to detect requests, in the incoming direction as well.

  The time slot identifier TSAC then ensures the transmission

  mission of the content of occupied time slots on a panel 25378 'i 9

  coupling to or from a beam of outgoing lines.

  Two solutions are possible in principle: a) For each incoming request from a subscriber, a PCM system 30 is reserved, on which all the other service requests will be stored; or (b) individual time slots are occupied

  random on the outbound line.

  In both cases, however, an identifier, not shown, must accompany the information during the duration of the link. The second method mentioned above has the advantage of a high utilization of the outgoing line bundle.

  complications in downstream switching devices, which insert

broadband services.

  Figure 3 shows that the coupling device required for narrowband service can be connected in series with other coupling devices E It is thus possible to integrate the information of several narrowband exchanges in one system.

MIC 30.

  The reservation of a PCM system 30 or parts thereof during the duration of a link has the following advantage

  for a subscriber: accurate assignment information flows

  for each subscriber from the end of the bundle of lines

aunts.

  As shown in Figure 4, information flows are trans-

  electro-optical converters 3 in the case of the inte-

  broadband or narrowband services BB or SB -D services so that the resulting optical signals can be transmitted to an optical coupling panel 2, then to the subscriber lines Asls for which the information is intended. One channel remains connected in the coupling panel for the duration of the link,

  so that in this case also relatively

  The optoelectrical components of this branch are used simultaneously to detect requests from

subscriber lines Asls.

  When meeting multiple services in a dialog mode, the

25378 19

  narrow-band signals from CMIC systems can be mixed in

  a coupling panel 4 with broadband signals in diode mode.

  (videophones, for example) This provides a flow of information

  according to MIC 1920 This information flow can, if necessary, be transmitted with other TV information to a set of multiplexers

  per wavelength WD-MUX, whose assignment is also inde-

  With the appropriate number of wavelengths in this WD-MUX multiplexer game, it will also be possible to

  give up completely the TV mutation in the future.

  As a result of its general use, the wavelength multiplex must again be allocated temporally to the various subscriber lines in a downstream optical coupling panel 2. Components remaining connected during the duration of the link are necessary.

to do this.

  An advantage of the invention lies in the fact that the mechanical connections of all the components no longer have to be displaced, so that there are always defined weakening conditions, in particular in the optical field. In addition, it should be noted in particular that further equipment for an integrated service network is possible without difficulty and that parallel operation of narrowband and broadband subscribers remains guaranteed at all times. subscriber,

  known until now, can also be totally removed (including

  taken in the case of defects), if the optical coupling panels

  are extended to the reserve fibers.

  Of course, various modifications may be made by those skilled in the art to the principle and to the devices which have just been described solely by way of nonlimiting examples, without

depart from the scope of the invention.

25378 f 9

Claims (5)

claims   1 Optical input splitter, constituting the junction, enter Ieg urban cables and lines from all directions of an urban network and central office equipment, said splitter being characterized by an electrical coupling panel (1), which affects 64 kbit / s channel multiplexers to a PCM system 30 and a PCM system PCM system PCM 1920 for the duration thereof, and a second downstream optical coupling panel (2) which manages several optoelectronic converters (o / e) and lambda multiplexers (X-MUX) also allocated to a link   during its duration, a sequential switching of the   range (1, 2) connecting the optical lines (Asls) to the terminals of the various broadband or narrowband switching systems (BB, SB).   2 optical input splitter according to claim 1, characterized in that the components of the electrical coupling panels 1 and optical (2) are allocated to a link, during its duration, by a   calculator (computer) using a setting command.   An input splitter according to claim 1, characterized in that all narrowband occupancies are combined in PCM systems 30 within a coupling device (E), which includes location identification circuits. time (TSAC) assigned to each PCM system 30 to determine the occupied time slots, and scanners (Scan) to determine the lines outgoing free of the beam.   Input splitter according to claims 1 to 3, characterized   by series connection of several coupling devices (E).   Input splitter according to claim 1, characterized in that electro-optical converters (3), which convert the information flows (narrowband and broadband services into dialogue mode), are arranged upstream of the signal board. coupling (2).   Input splitter according to claims 1 and 5, characterized   in that a wavelength multiplexer set (WD-1 {E) is arranged upstream of the coupling panel (2) and receives flows   information according to MIC 1920, constituted by TV information.