US Robotics modems
AT&F1, ATS0=2E0Q1&W, ATZ
AT&F, ATS0=2E0Q1&W, ATZ
These leave the modem in auto answer, no local echo mode, which is suitable for hooking up to a serial port being monitored by a getty.
It's also possible to dial out if you supply AT&F as part of your dialout string.