ZyXEL Elite 2864 User Guide - Page 53

ZyXEL Parallel Port Adapter ZyXEL is developing a special parallel port adapter that will make parallel port transfers much faster between a PC and the Elite 2864. The speed limitation in this case will be determined by how fast and how efficient the PC software program can handle the data. The operation instructions for this special parallel port adapter are included in the adapter manual. Check ZyXEL's announcements for availability, which is expected to be within a few months of the 2864's introduction. Refer to chapter 21 for information on the ZyXEL serial/parallel I/O adapter. Using the Microphone and Speaker Jacks On the right side or back of the modem, there are two jacks for external microphone and speaker connections. The speaker jack is capable of directly driving an 8 ohm speaker. When an external speaker is plugged into the speaker jack, the internal speaker is cut off. The speaker jack only drives one speaker. If you have two speakers with a stereo plug, use a plug adapter that will enable both speakers to be driven by one source out of the speaker jack. If you are connecting the speaker jack output to an amplifier, insert some attenuation in between. The speaker jack output signal may be too strong for the amplifier. The voice input/output device selection is controlled by voice AT commands. Use AT+VLS=8 to select the external microphone and AT+VLS=16 to select the modem internal speaker as input or output device. The external speaker simply physically replaces the internal speaker, and the device selection remains the same. Usually, the user makes input/output device selection through application software packages according to the program's instructions and the user doesn't need to worry about using commands to make a selection. Non-volatile Memory The Elite 2864 series modem uses a 16Kbit EEPROM for parameter storage, which is four times larger than that of the U-1496 series. There are four user profiles of which each includes 128 S-registers (S0 to S127). 50 phone numbers and 50 passwords can be stored. 4-3