Date: Fri, 26 Aug 2005 02:24:37 +0200 From: Hans Petter Selasky <hselasky@c2i.net> To: freebsd-isdn@freebsd.org Subject: Support for primary rate Message-ID: <200508260224.37392.hselasky@c2i.net>
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Hi, I just want to let you know that support for Primary Rate is almost finished. I have done some testing on a Pentium 200MHz, and can show you the following numbers at 4MBit/second total transfer rate: 31 channels(rx+tx) under HDLC emulation: CPU load: 20% (according to ps) 31 channels(rx+tx) under hardware HDLC: CPU load: 10% (according to ps) It would run on a 33MHz even :-) NOTE: the HDLC-emulator has to pipes reading, and one pipe writing, hence I used two devices for this experiment. The hardware HDLC has only got one pipe reading and one pipe writing. So a more fair view is: 10% / 2 = 5% per 2MBit/s 20% / 3 = 7% per 2MBit/s So software HDLC is very fast. I expect something working by the end of next week. The chip I have added support for is HFC-E1, and cards with that device can be bought at: http://www.beronet.com and http://www.junghanns.net for around 500 euros, which is not so bad. --HPS
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