Date: Fri, 4 Apr 2003 20:32:15 +0200 (CEST) From: Helge Oldach <iuidas73123@oldach.net> To: jhs@berklix.com (Julian H. Stacey) Cc: freebsd-isdn@freebsd.org Subject: Re: ISDN4BSD Modems & Cards Message-ID: <200304041832.h34IWFJC069324@sep.oldach.net> In-Reply-To: <200304041022.h34AMi144844@flip.jhs.private> from "Julian H. Stacey" at "Apr 4, 2003 12:22:44 pm"
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Julian H. Stacey: > > "Brad" writes: > > > Is there a performance benefit using an ISDN card with i4b over an ISDN TA? Apart from the issues mentioned already there is a minor encapsulation gain. While on an external TA you usually can run HDLC encapsulation with byte stuffing only, an internal card would allow for bit stuffing which is slightly more efficient. In practice however the delta is so small that it's probably not worth explaining the difference. :-) It does matter only if you utilize the link at full speed with true binary data (precisely, with a randomly distributed amount of 0x7E patterns). > adding price of 2 beers at bar prices, & next time > Hellmuth visits Munich I'll buy him a beer. Hellmuth, being used to north Germany beer strength, will probably need both in Bavarian beers for a noticable effect. :-) Helge
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