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Date:      Tue, 19 May 1998 00:56:36 +0200
From:      "Julian H. Stacey" <jhs@FreeBSD.ORG>
To:        freebsd-isdn@FreeBSD.ORG
Subject:   	White noise outgoing from creatix 16 bit cards
Message-ID:  <199805182256.AAA01082@jhs.muc.de>

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Hi i4b folks,
 I'm running FreeBSD-2.2.5 with i4b alpha 60 &
options "TEL_S0_16"
device isic0 at isa? port 0xF80 iomem 0xd6000 net irq 12 flags 2 vector isicintr
pseudo-device   "i4bq921"
pseudo-device   "i4bq931"
pseudo-device   "i4b"
pseudo-device   "i4btrc"        4
pseudo-device   "i4bctl"
pseudo-device   "i4brbch"       4
pseudo-device   "i4btel"        2
pseudo-device   "i4bipr"        4
pseudo-device   "i4bisppp"      4
pseudo-device   sppp            2

Sometimes people who phone me after I've stopped i4b (via hang up channel
& 4 for close i4b daemon) hear white noise , (I never hear it, only far end,)
as soon as I pull the i4b cable the noise stops,
it's not merely induction between wires,
I have 2 identical isic0 cards, both do it, (one has the cable tied tight to
all the others (monitor, mouse etc), one does not & is loose.
An Istec-1008 TK-Anlage/PBX cohabits the isdn line & drives my phones.

The problem did not occur with bisdn (I think it used to with old bisdn,
but then by bisdn-097 it had gone away). What the cause is I have no idea,
but having 2 isdn systems I can afford to apply & test patches to one if
someone want to send diffs to try.

PS currently both hosts are Creatix 16 cards, both 486, both 2.2.5,
one is i4b-51, one i4b-60, both going to 2.2.6+60 soonish.

Julian
Julian H. Stacey  <jhs@freebsd.org>  http://www.freebsd.org/~jhs/

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