Thank you, Marv, for the thorough explanation. I am somewhat disheartened, now that I've found one that works, that I'll have continue searching. On Fri, 4 Nov 2011 19:42:28 -0400 Marvin Stodolsky <marvin.stodolsky@xxxxxxxxx> wrote: > Jason, > > This is an issue explored long ago. > For Controller Chipset (hardware) modems, all of the signal processing > occurs on the modem card with each having its own port/device and no > deleterious overlap of functionality in the CPU. Thus multiple > hardware modems can be serviced on a single PC. > > However the so called softmodems (which you likely have) were designed > as cheap consumer devices, and the supporting software was NOT written > with sophistication to maintain separate data streams in the CPU, > which does carry increasing amounts of the signal processing in the > AC'97 modem family, and almost all the processing for the more current > family of modem chips hosted on High Definition Audio cards. For > these modems, the modem hardware has two major roles: > 1) providing the physical interface to the phone line > 2) specify the software package to be used under Microsoft. > > A few members of this List wrote additional software to create > separate ports for multiple Lucent/Agere modem cards, but this alone > proved to be inadequate. > The precompiled ltmdmobj.o component of the code (which we could not modify) > just did not maintain separate data streams during concurrent modem usage. > > Our contacts at Lucent/Agere recommended that for reliable service, > it was indeed necessary to use hardware modems. > > MarvS > scanModem maintainer > > On Fri, Nov 4, 2011 at 6:52 PM, Jason Flatt <jason@xxxxxxxxxxxxxxxx> wrote: > > Hello all. > > > > I have a computer that I'm setting up as a fax server, and I've installed > > two US Robotics PCI Express modems (they use the Agere Systems chip set) > > in it. > > > > Both devices work fine separately. The system recognizes them, creates the > > device file and symbolic link. setserial, wvdial, and minicom all work > > with both of them. > > > > The problem I have is that only one device file is created, so I cannot use > > the two of them simultaneously. > > > > I have searched the Internet, and especially the archives for this list to > > no avail. Apparently, no one ever installs two of these devices into the > > same computer (or I don't know how to search, which is also entirely > > likely). > > > > So, my question is, how do I get a second device file created, or create > > one myself, that will allow the two modems to operate at the same time in > > the one computer? > > > > Thank you. > > > > > > -- > > Jason Flatt > > Computer and network service and support: http://www.flattandsons.com/ > > Father of seven: http://www.flattfamily.com/ (Joseph, 18; Cramer, 16; > > Travis, 14; Angela; Harry, 11; William, 5; and Dolly, 3) Linux user: > > http://www.ubuntu.org/ Drupal fanatic: http://drupal.org/ > > -- Jason Flatt Computer and network service and support: http://www.flattandsons.com/ Father of seven: http://www.flattfamily.com/ (Joseph, 18; Cramer, 16; Travis, 14; Angela; Harry, 11; William, 5; and Dolly, 3) Linux user: http://www.ubuntu.org/ Drupal fanatic: http://drupal.org/
