Black Box 5000 manual 263

Glossary

VF, voice frequency — Any frequency within that part of the audio-frequency range essential for the transmission of speech of commercial quality (300-3000 Hz). This is the frequency range used over telephone lines.

voice compression — A method of minimizing bandwidth by reducing the number of bits required to transmit voice.

warm start — A system reset that maintains the current configuration. A Multiserver warm start may be performed in the Command Facility or at the front of the unit.

X-ON,X-OFF— Control characters used for flow control.

X.21 bis link — Commonly used in European countries, this is a pay-as-you-go link. When a signal is raised, the network automatically establishes a link to the remote unit. This link is utilized for Multiserver-to-feeder mux connections.

263