ZyXEL Elite 2864 User Guide - Page 151

ZyXEL ZyCellular Modes In addition to normal modem, fax, and voice operation modes, the following cellular modes are offered in 2864 series modems: Mode MULTI-AUTO CELL 14400 CELL 12000 CELL 9600 CELL 7200 CELL 4800T Speed V.34/ZyX modes/V.32bis/V.32/V.22bis/G3 FAX/Cellular Modes 14400/12000/9600/7200/4800 12000/9600/7200/4800 9600/7200/4800 7200/4800 4800 CELL 14400 will connect with another modem using cellular mode at a speed of up to 14400 bps. It will also connect with another V.32bis/V.32 modem. The actual speed depends on the line condition. The modem will automatically fall-back or fall-forward within its speed range. CELL 12000, CELL 9600, and CELL 7200 limit the maximum speed to 12000 bps, 9600 bps, and 7200 bps, respectively. CELL 4800T uses a trellis coded modulation at 4800 bps speed. It has a better performance than the uncoded V.32 4800 bps mode. The modem will automatically and dynamically select and adjust to the best speed and mode in which to operate. Selecting one of the above cellular modes only limits the maximum speed at which the modem will operate. The MULTI-AUTO mode will automatically adapt to the other modem's capability, and will request and connect in the appropriate mode. If both sides have cellular mode capability and at least one side is using a cellular phone, using MULTIAUTO to make or answer a data call will result in a cellular mode connection. MULTI-AUTO is the default mode. Cellular Mode Usage Usage of the cellular mode is recommended when using a cellular link for modem connections. It can also be used for other bad line conditions such as a line with frequent large impulse noise. ZyCellular mode is more noise resistant, impairment resistant, and error resistant. It is simple to use the ZyCellular mode. Everything is determined automatically by the modem. The user only needs to set S-register S49 bit 7 and leave the modem on MULTI-AUTO. The modem takes care of everything else. 14-3