19c749625f
ISDN4BSD is the work of our brand-new comitter: Hellmuth Michaelis, who has done a tremendous amount of work to bring us this far. There are still some outstanding issues and files to bring into the tree, and for now it will be needed to pick up all the extra docs from the isdn4bsd release. It is probably also a very good idea to subscribe to the isdn@freebsd.org mailing list before you try this out. These files correspond to release "beta Version 0.70.00 / December 1998" from Hellmuth.
61 lines
2.5 KiB
Plaintext
61 lines
2.5 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 1.2 1998/01/22 20:39:49 hm Exp $
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*
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* last edit-date: [Thu Jan 22 19:57:50 1998]
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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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