ACU-5000 Operations Manual
Interoperability Now 7
Session Initiation Protocol – A flexible, standards-based, open protocol that initiates and manages
communications between devices over an IP network.
A computer that’s used as a VoIP phone.
A means of detecting audio and causing some action when it is present, such as keying a transmitter
or unmuting an audio path.
Voice Modulation Recognition. An algorithm which causes a transmitter to key or causes some
other action when voice is present. This squelch type is activated by only by human voice, and not
by tones, noise or other non-speech audio. Particularly useful for noisy signals such as HF.
Voice Over Internet Protocol - Protocol for delivering voice communications over IP networks.
Most network-phone providers (such as Vonage), use VoIP.
Voice Operated Xmit (Transmit). A circuit or algorithm which causes a transmitter to key or causes
some other action when sound is present. This squelch type is activated by any audio signal, and
is not restricted to voice only.
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