Push-to-talk Operation

Push-to-talk operation (PTT): In telephone or two-way radio systems, that method of communication over a speech circuit in which the talker is required to keep a switch operated while talking. Note: In two-way radio, push-to-talk operation must be used when the same frequency is employed by both transmitters. For use in noisy environments, or for privacy, some telephone handsets have push-to-talk switches that allow the speaker to be heard only when the switch is activated. Synonym press-to-talk operation. Source: From Federal Standard 1037C and from MIL-STD-188

 

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principal clock
priority
priority level
private line
proceed to select
propagation constant
propagation path obstruction
proration
protected distribution system
protocol control information
protocol data unit
provisioning
pseudorandom noise
pseudorandom number sequence
psophometer
psophometric voltage
public data transmission service
public land mobile network
pulsating direct current
pulse
pulse address multiple access
pulse amplitude
pulse code modulation
pulse duration
pulse link repeater
pumping
push to type operation
quadrature
quadruply clad fiber
quality control
quasi analog signal
queuing delay
radiation angle
radiation mode
radiation pattern
radiation scattering
radio equipment
radio fix
radio horizon
radiometry
randomizer
random number
receive after transmit time delay
received noise power