Recently, I changed my old internal 14.4K modem to Hayes Optima 56KFlex (Rockwell) external modem on my PC which runs RedHat Linux 4.0. I have two PPP links, one of which was set to be automatically linked at boot time. I could switch to another link (different phone number) by deactivating the default one and then activating another with the old modem. With this Hayes 56K modem, however, I cannot turn off the default link any more, even by manually running the ifdown-ppp command. If I don't set one link activated at boot time, I can switch back and forth between the two links with no problem after logging in. Could anybody please help me out why the default link activated at boot time cannot be deactivated on this 56K modem?
Another small question is whether there is anyway to know the connection speed of modem on Linux. I didn't feel dramatic speed improvement with this 56K modem. I just want to make sure the connection speed is around 40K.