Key up — Transmit.
Pressing the transmit button. From the old telegraph key.
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Related words
- Picket fencing — A fluttering, choppy signal.
- Ragchew — Shooting the breeze.
- Relay — Pass a message along.
- 88 — Love and kisses.
- Double — Two people talking at once.
- Clear — Goodbye, off the air.
- Full quieting — No background noise at all.
- Roger — Got it, understood.