SE514991C2

SE514991C2 - Coded connection measuring method which incorporates multiple channels

Info

Publication number: SE514991C2
Application number: SE9502680A
Authority: SE
Inventors: Jan Holmgren
Original assignee: Telia Ab
Priority date: 1995-07-20
Filing date: 1995-07-20
Publication date: 2001-05-28
Also published as: SE9502680L; SE9502680D0

Abstract

The method separates an actual channel, from the connection (9) by means of a channel separation device (3). The channel is transferred via a coupling path (4) to a matrix shelf (7) equipped with a CAU card (5) where the signal on the channel is decoded. A CTL card (6) in the matrix shelf, forms a digital loop and transfers the decoded signal to a measurement instrument (8). The actual channel is separated from the connection by the actual time slot being separated. A channel with 64 kbit/s is separated from the connection with 2 Mbit/s for a measurement instrument suitable for 64 kbit/s. The separation instrument for the channel from the connection is of the type EL MI (RTM) or interceptor (RTM). The measurement instrument suitable for 64 kbit/s is preferably of the type PF-20 (RTM).

Description

20 25 30 514 991 2 K rtfa krivnin v ri nin arn Uppfinningen kommer att förklaras i detalj härefter med hänvisning till bifogade ritning, vars enda figur är ett blockschema över en föredragen utföringsform av uppfinningen. The invention will be explained in detail hereinafter with reference to the accompanying drawing, the only figure of which is a block diagram of a preferred embodiment of the invention.

Dataljarag paskrivning av an föradragan gtföringafgrm I figuren visas ett avsnitt av en förbindelse från en telestation, som här representeras av en multiplexor (MUX) 1 till vänster. Förbindelsen 9 är på 2 Mbit/s och innehåller 32 st kanaler med 64 kbit/s. För att testa förbindelsen sänds testmönster ut av en testcentral från en mätpunkt (DDS) 2.The data shown in the figure shows a section of a connection from a telecommunications station, which is here represented by a multiplexer (MUX) 1 on the left. Connection 9 is 2 Mbit / s and contains 32 channels with 64 kbit / s. To test the connection, test patterns are transmitted by a test center from a measuring point (DDS) 2.

Testmönstret medger mätning av olika signalparametrar som kan vara av intresse. Testmönstret blir emellertid också kodat på förbindelsen.The test pattern allows measurement of various signal parameters that may be of interest. However, the test pattern is also coded on the connection.

För att kunna mäta på mönstret separeras en aktuell t.ex. kanal från förbindelsen av ett instrument 3, av typen ELMI eller Interceptor. Instrumentet tar ut en tidslucka i den digitala signalen för mätning. Den separerade kanalen skickas sedan via en kopplingsplint 4 till en matrishylla 7 bestyckad med ett CAU-kort 5, där signalen avkodas. Matris- hyllan 7 innehåller också ett CTE-kort 6 som bildar en digi- tal slinga och skickar signalen till ett mätinstrument 8 via kopplingsplinten 4. Mätinstrumentet 8 är avpassat för 64 kbit/S och är företrädesvis av typen PF-20.In order to be able to measure the pattern, a current e.g. channel from the connection of an instrument 3, of the type ELMI or Interceptor. The instrument takes out a time slot in the digital signal for measurement. The separated channel is then sent via a terminal block 4 to a matrix shelf 7 equipped with a CAU card 5, where the signal is decoded. The matrix shelf 7 also contains a CTE card 6 which forms a digital loop and sends the signal to a measuring instrument 8 via the terminal block 4. The measuring instrument 8 is adapted for 64 kbit / S and is preferably of the PF-20 type.

Således möjliggör uppfinningen felsökning direkt på kodade förbindelser, vilket har fördelen att korta ner fel- sökningstider i befintliga telekommunikationssystem. Den föredragna utföringsformen utnyttjar i och för sig känd tek- nik och en fackman inser alternativa utföringsformer. Upp- finningen är endast begränsad av nedanstående patentkrav.Thus, the invention enables troubleshooting directly on coded connections, which has the advantage of shortening troubleshooting times in existing telecommunication systems. The preferred embodiment utilizes technology known per se and one skilled in the art will recognize alternative embodiments. The invention is limited only by the following claims.

Claims

10 15 20 25 30 35 40 (514 991 3 PATENT REQUIREMENTS

A method for measuring on a coded connection comprising a plurality of channels, wherein a signal with a test pattern is transmitted from a measuring point (2) on at least one channel in the connection (9), characterized in that it comprises the steps of: a ) a current channel is separated from the connection (9) by means of a channel separation device (3); b) the channel is transmitted via a terminal block (4) to a matrix shelf (7) equipped with a CAU card (5) on said channel is decoded; c) a CTE card (6) in the matrix shelf (3), which card forms a digital loop, transmits said decoded signal (8)

A method according to claim 1, wherein the signal (6) to a measuring instrument for measurement. characterized in that the current channel is separated from the connection (9) by separating the current time slot.

Method according to Claim 1 or 2, characterized in that a channel of 64 kbit / s is separated from the connection (9) by 2 (8).

Arrangement for measuring on coded connection within Mbit / s for a measuring instrument adapted for 64 kbit / s. comprising a plurality of channels, a measuring point (2) introducing a signal with a test pattern of at least one channel in the connection (9), characterized by a channel separation device (3) a matrix shelf (7) which by means of a CAU card separating a current channel in the connection (5) decodes a CTE card (6) in said array (9), the signal in said channel, shelf (7), which forms a digital loop which transmits said decoded signal to a measuring instrument (8) for measurement.

Arrangement according to claim 4, characterized in that the channel separation device (3) is an instrument which separates a current time slot from the connection.

Arrangement according to one of Claims 4 or 5, characterized in that the decoding device (5) is a CAU card and is a CTE card, which cards are placed in a matrix shelf (7). that the loop forming device (6)

Arrangement according to one of Claims 4 to 6, characterized in that the connection (9) is of the type 2 Mbit / s and the separated channel is of the type 64 kbit / s.