Telos ZephyrExpress user manual What youÕve got here

What youÕve got here:

ZephyrExpress is a portable, one-box solution for high-quality broadcast audio remotes via ISDN. It combines a flexible stereo digital mixer, two stereo monitor mixers, coder and decoder for international-standard audio data compression, and an ISDN interface.

∙You can plug microphones and a headphone in one end, an ISDN line in the other, and you’re ready for instant two-way 20kHz stereo transmission virtually anywhere in the world.

ZephyrExpress communicates with Telos’ Zephyr or another ZephyrExpress, or with any other brand of codec using MPEG Layer 2, MPEG Layer 3, or G.722 algorithms. ISDN and audio setups can be pre-programmed for one-button connection. ZephyrExpress can even call standard telephones via ISDN, eliminating the need for a separate circuit and phone at the remote location.

(ISDN, by the way, is a telephone company technique for stuffing two bi- directional 64kpbs channels on the same copper pair that was originally designed for a single voice circuit. In many cases it can use existing wiring. ISDN requires special terminators and synchronized terminal adapters, built in to ZephyrExpress.)

∙Actually, what you’ve got here is the Users’ Manual. It’ll tell you everything you need to operate ZephyrExpress, how to order ISDN circuits and connect to them, how audio coding work and how to choose its options, how to maintain ZephyrExpress, and lots of tips and shortcuts for using the system efficiently.

∙There’s also a 40-page Mini-Manual with abbreviated operating instructions and common questions about using ZephyrExpress. It’s designed to be kept with the unit and taken to the remote broadcast.

∙And there’s a 4-page laminated Field Guide, also intended to be kept with ZephyrExpress.

ii Introduction