Date: Sun, 6 Jul 2003 22:06:39 +0200 From: Mark Santcroos <marks@ripe.net> To: Gary Corcoran <garycor@comcast.net> Cc: mobile@freebsd.org Subject: Re: lucent modem ? where it is ? Message-ID: <20030706200638.GD664@laptop.6bone.nl> In-Reply-To: <3F087D18.8DB38864@comcast.net> References: <5.2.1.1.2.20030706204804.02493a08@194.184.65.4> <5.2.1.1.2.20030706210013.04f9a210@194.184.65.7> <3F087D18.8DB38864@comcast.net>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, Jul 06, 2003 at 03:48:40PM -0400, Gary Corcoran wrote: > Seems you got a "soft modem", which really isn't a modem, but > only a codec (analog-to-digital and digital-to-analog converters). > The rest is done by (windows) software. Your Pentium is responsible > for doing all the work that the DSP of a regular modem does, and so > you don't just need a "driver" in the usual sense. Which is why the > normal Lucent driver won't work, and why you can't just "get specs" > to drive it. In other words, the "driver" has to contain full > Digital Signal Processing code (plus the usual driver code) to > send/receive all the complex audio tones that a modem handles (in > real-time, of course). This is so the manufacturer could save a > couple of dollars (instead of buying the real modem chip)... Your story is true, but doesn't really address the issue. What was meant by "the Lucent driver" (see ports/comms/ltmdm) is a driver for (some of) the ISA/PCI type Lucent softmodems. It is not suited for this type of system (AMR/AC97) (yet). Whether the same driver could be made suitable easily is something I don't know without looking more at it. (Depends on whether it is the same codec probably) Mark -- Mark Santcroos RIPE Network Coordination Centre http://www.ripe.net/home/mark/ New Projects Group/TTM
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20030706200638.GD664>