fbf08005d7
The left out parts (which have not been installed by ISDN4BSD on NetBSD anyway), may be added as pkgs later (if demand exists).
63 lines
2.6 KiB
Plaintext
63 lines
2.6 KiB
Plaintext
*---------------------------------------------------------------------------
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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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* $Id: cable.txt,v 1.1.1.1 2001/01/06 13:00:29 martin Exp $
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*
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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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*
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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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