Date: Sat, 17 May 1997 14:46:05 -0700 (PDT) From: Tony Li <tli@jnx.com> To: dennis@etinc.com Cc: bradley@dunn.org, isp@FreeBSD.ORG Subject: Re: interface card to connect 64k..256k to connect to internet Message-ID: <199705172146.OAA11943@chimp.jnx.com> In-Reply-To: <3.0.32.19970517102841.00b2d9e0@etinc.com> (message from dennis on Sat, 17 May 1997 10:28:45 -0400)
next in thread | previous in thread | raw e-mail | index | archive | help
>4XT1 = 4x(1.5Mbpsx2) = 12Mbps >4 cards@12Mbps = 48Mbps >1x 10/100 = 100Mbps > >Total=148Mbps. PCI can (and does) deliver up to 500Mbps. Of course we were talking about 4 QUAD T1 cards, but you can do the math.... Dennis, look again, dude! I did. Really. ;-) I _should_ have noted that if you have the 100BaseT in full duplex, then it's 248Mbps. Yawn. It would be very interesting to see even higher density T1 cards. I know of one 8xT1 card. I don't know of a FreeBSD driver for it tho. I wonder what could be done.... ;-) ISA can handle 6 T1 lines in practice...and worst case PCI is 8 times faster, usually MUCH better than that. The difference is that with ISA, it IS the limiting factor, with PCI, its the OS processing as you pps get very high that is the limiting factor. The other consideration is ISA configuration. For some folks, it's a non-starter. Tony
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?199705172146.OAA11943>