SE457592B - OPTICAL HEAD DISTRIBUTOR - Google Patents

Description

457 592 '10 15 20 25 30 35 2 and in addition in broadband dialogue services a PCH-30 system with a PCH-1920 system. A second. subsequently connected optical coupling field 2 serves a number of optoelectric converters ole together with lambda multiplex units Å-HUX in the same way. Hed lambda multiplexing unit is referred to here as a device. which enables the distribution of information on optical connections. working on different optical wavelengths. The switching as a result of these switching fields affects the total number of optical connection cables AsLs and the connections on the various broadband and narrowband switching systems for each subscriber at the different switching points.

The elements at the electrical and optical coupling field 1.2 can be regarded as storage for establishing connections, which during the duration of a connection by means of a computer and setting order is assigned to the connection. i.e. virtually all elements of the main optical distributor are available to subscribers independently and not as hitherto subscriber coordinated. The instruction is done by means of a computer. As a result, manual switching is no longer required.

As shown in Fig. 2, in order to reduce the number of wires in the main distributor, all subscribers participating in room multiplex from a narrowband switching point x in the PcH-30 systems are combined. This measure enables a reduction in the number of lines by a factor of 30 and the processing of message flows within the time range. which facilitates the use of large integrated circuits.

Hed using a TSAC device for determining the time and a scanner Scan. which is coordinated with a PCH-30 system. the times in the system are determined on the departure page. which can be coated. In the oncoming direction, it also serves to scan request signals. The device TSAC then ensures. that the contents of the occupied times are transferred by a connection field from or to a receiver bundle.

In this case, the procedure can in principle be in two ways: 10 15 20 25 30 35 457 592 a) For each incoming request from a participant, a PCH-30 system is reserved. to which all additional requirements for services in order can be applied. or b) individual times are added to the receiver bundle for optional occupancy.

In both cases, a message of recognition (not shown) must be carried with the message during the duration of the connection. In this case, the latter * method has the advantage of high relief of the receiver bundle. However, this can be done in the switching devices connected afterwards. which include broadband services, lead to increased complications.

Fig. 3 shows. that the connection device required for a narrowband service can be connected in series with additional connection devices E. This makes it possible to integrate the information from several narrowband transmission points in a PCH-30 system.

Reserving a PCH-30 system or parts thereof during the maintenance of a connection has the advantage for the subscriber. that there are already clearly coordinated message streams at the end of the receiver bundle per subscriber. As shown in Fig. 4, in the integration of broadband and narrowband services BB and SB, message streams are fed; to converter 3 and is converted electro-optically. so that the resulting optical signals are transmitted to an optical switching field 2 and from there can be transmitted to the connection lines Asbs, for which the messages are intended. A path in the connection field remains open for the duration of the connection. so that even comparatively slow-acting switching elements are used in this case. The optoelectric elements in this branch also serve at the same time to determine the request signal from the subscriber connection lines Asbs. when combining several dialogue services, the narrowband signals from the PCH-30 systems in a switching field 4 can be mixed with broadband signals (for example videophone sets). This results in a message stream according to PCH 1920. This message stream can possibly be supplied with a set of wavelength multiplex units ND-HUX in conjunction with additional TV messages. which is also not subscriber coordinated. With a corresponding number of wavelengths in this set HD-HUX, it is possible to completely avoid TV broadcasting in the future.

Due to its general usefulness in a subsequently connected optical connection field 2, the wavelength multiplex must of course be re-coordinated with the individual subscriber connection lines. Therefore, elements are required. which is conductive during the duration of the connection.

The invention also has the advantage. that the mechanical connections between all elements no longer need to be moved. so that, especially in the optical field, there are constantly defined attenuation conditions. Furthermore, it can be emphasized in particular. that later supplementation in the direction of a service-integrated network can be carried out without problems and that parallel operation of narrow and high-band subscribers remains possible at any time. The mechanical switching of subscriber connection lines. used so far. can also be completely eliminated. which also applies in the event of errors. when the optical coupling fields are also supplemented for spare fiber. v w »

Claims (6)

.457 592 Patent Claims 1. l. Optical main distributor such as transition between local lines. which converge from all directions in a local network, and connection lines as well as transmission technical devices, are characterized in that it consists of an electric connection field (1) with conventional connection lines and with multiplex devices. which, during the duration of a connection, coordinates 64 kbit / s channels with a PCH-30 system and a PCH-30 system with a PCH-1920 system. and a second optical connection field (2) for the connection structure in series with the first connection field (2). which serves a number of optoelectronic converters (ole) as well as lambda multiplex units (k-MUX), which are assigned a connection during its duration. wherein switching due to the switching fields (1. 2) serves to connect the optical connection lines (AsLs) made in the form of glass fiber lines with the connections on the various wide and narrowband transmission systems (BB. SB). Distributor according to Claim 1, characterized in that the elements in the electric (1) and the optical (2) switching field are assigned the connection during the duration of a connection of a computer by means of setting orders. Distributor according to Claim 1, characterized in that all narrow-band coatings in the PCH-30 systems are combined in one connecting device (E). which includes with each PCM-30 system coordinated time-determining switching step (TSAC) to determine these systems' occupied times and scanners (Scan) to determine available receivers in the receiver bundle. Distributor according to Claim 3, characterized in that several connecting devices (E) are connected in series. Distributor according to Claim 1, characterized by ~ 457 592 I 6 electro-optical transducers (3) connected before the coupling field (2). as electro-optically converting: the message scams (sma1 and broadband dialog services). A feed laser according to claims 1 and 5, wherein a set of wavelength division multiplex units (ND-MUX) are arranged before the coupling belt (2). which is supplied by TV sub-courts1- existing message streams according to PCH 1920. k ä n n e t e c k n a d of