Date: Fri, 04 Apr 2003 10:19:03 +0200 From: Gary Jennejohn <garyj@jennejohn.org> To: "Brad" <bradd@cat.co.za> Cc: Jan <free@staaken.org> Subject: Re: ISDN4BSD Modems & Cards Message-ID: <200304040819.h348J3uN007026@peedub.jennejohn.org> In-Reply-To: Your message of "Fri, 04 Apr 2003 09:34:17 %2B0200." <024501c2fa7c$99285080$5e22a8c0@cat.co.za>
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"Brad" writes: > Is there a performance benefit using an ISDN card with i4b over an ISDN TA? > Not in my experience. 64 Kb/s is easily handled by a serial port, so you generally get the full bandwidth. One advantage that a card brings is fewer interrupts. since most cards only interrupt every 32 bytes, whereas a TA interrupts for every byte, but if you have a fast CPU it makes little difference. Cards are usually cheaper than TAs, though. --- Gary Jennejohn / garyj@jennejohn.org gj@freebsd.org gj@denx.de
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