Telos ZephyrExpress - Manual (Page 2)

ii Introduction
What you’ve 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.