ZyXEL Elite 2864 User Guide - Page 70

DTE RATE + FIXED FOLLOWS LINK RATE AT&B1 AT&B0 Modem serial port speed is always fixed, no matter what link rate (modem speed) is connected. If S44.6=1 and a non-ARQ connection is made, DTE rate follows link rate as if &B0 were set. (Default) Modem serial port speed is set in accordance with the link rate. If S44.6=1, the DTE speed is fixed at 38400 bps when the link speed is above 9600, at 9600 when the link speed is 7200, and at link speed when it is below 7200. Note: If you wish to keep your DTE rate fixed, you should choose a buffered transfer. (see DATA FORMAT) DTR OPTIONS IGNORED 108.1 AT&D0 AT&D1 + DTR / 108.2 AT&D2 108.2 + RST AT&D3 The modem assumes that DTR is always ON and ignores the DTR signal on the serial port. An OFF-ON DTR transition causes the modem to dial the number specified under the DEFAULT DIAL of the MODEM OPTIONS submenu. An ON-OFF transition disconnects the modem from the line. An ON-OFF transition of the DTR signal will disconnect the modem from the line. (Default) Same as &D2 but DTR OFF also causes reset from profile 0. Note: Not all computers provide a DTR signal at their serial port connector. If this is true for your computer (e.g., Apple Macintosh), you must use the IGNORED setting (AT&D0). DCD OPTIONS + TRACKS CARRIER ALWAYS ON AT&C1 AT&C0 DCD ON when a carrier is detected (see also S38b3). If S42.7=1, DCD only pulses off for 0.5 sec when carrier loss occurs. (Default) The modem forces DCD to always remain ON. 6-4