Date: Wed, 1 Apr 1998 11:42:35 +0200 (MET DST) From: Wolfgang Helbig <helbig@Informatik.BA-Stuttgart.DE> To: hm@hcs.de Cc: garyj@muc.de, freebsd-isdn@FreeBSD.ORG Subject: Re: i4b-L1-F_ill:What is this? Message-ID: <199804010942.LAA22292@rvc1.informatik.ba-stuttgart.de> In-Reply-To: <m0yKHs0-0000dUC@hcswork.hcs.de> from Hellmuth Michaelis at "Apr 1, 98 09:23:36 am"
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> >From the keyboard of Gary Jennejohn:
>
> > >> xxx_ISAC_IRQ..: RME: Input Buffer Overflow...
> >
> > I see exactly the same thing with a Teles 16.3 card when I boot and _before_
> > isdnd starts. Once the daemon is running the messages disappear.
>
> Hmm - Gary, i remember we found out that you have got a constant-active
> ("daueraktiv" in german, don't know the english word) S0 bus, perhaps
> this is the cause ?!
According to Q.921 5.9.3 the max size of the information field is
260 bytes. Add four bytes (2 bytes address and 2 bytes control)
and you end up with a max size of a D frame of 264 bytes.
So I suggest the following change:
(Didn't test it though)
Wolfgang
--- /home/helbig/src/i4b/layer1/i4b_l1.h Tue Mar 10 14:57:47 1998
+++ layer1/i4b_l1.h Wed Apr 1 11:38:22 1998
@@ -72,7 +72,7 @@
#define SEC_DELAY 1000000 /* one second DELAY for DELAY*/
-#define MAX_DFRAME_LEN 260 /* max length of a D frame */
+#define MAX_DFRAME_LEN 264 /* max length of a D frame */
#define min(a,b) ((a)<(b)?(a):(b))
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