1998-12-27 21:47:14 +00:00
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*---------------------------------------------------------------------------
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*
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* Custom cable to trace an ISDN S0 bus with two passive (!) ISDN boards
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* ---------------------------------------------------------------------
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*
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1999-12-14 21:14:28 +00:00
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* $Id: cable.txt,v 1.4 1999/12/13 21:25:26 hm Exp $
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1998-12-27 21:47:14 +00:00
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*
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1999-12-14 21:14:28 +00:00
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* $FreeBSD$
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*
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* last edit-date: [Mon Dec 13 21:55:42 1999]
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1998-12-27 21:47:14 +00:00
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*
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* -hm documentation of analyze mode
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*
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*---------------------------------------------------------------------------*/
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The cable consists of a RJ-45 plug with both tx and rx connected and
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two jacks; the tx cables from the plug are wired to one jack and the
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rx cables from the plug are wired to the other jack.
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The computer must be equipped with two (!) supported passive cards and
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the cable from one card is plugged into one of the jacks while the cable
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to from the other card is plugged into the other jack.
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Now one card monitors the tx part of the S0 bus and the other card
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monitors the rx part.
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Which card functions as the rx side and which as the tx side can be
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specified as options to the isdntrace utility (-R and -T) which has
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to be run in analyzer mode (-a) to support this configuration.
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1
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2
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3
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+--------------4 receiving-side board
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S0-bus +--|--------------5 in computer (jack for
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to analyze | | 6 cable to passive controller)
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8 | | 7
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7 | | 8
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transmit - 6------------|--|--+
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receive - 5------------+ | |
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receive + 4---------------+ |
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transmit + 3------------+ |
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2 | | 1
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1 | | 2
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plug into | | 3
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S0 bus +-----|-----------4 transmitting-side board
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+-----------5 in computer (jack for
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6 cable to passive controller)
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7
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8
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RJ-45 plug RJ-45 jack
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view from the front view from the front
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cable goes out to the rear
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/--------- / ----------
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| 87654321 | | 12345678 |
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|__ __|/ |/_ /_|
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|____|/ |/___|
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