Clue: (k) Sound heard when a telephone is picked up (2 words)

We have 1 answer for the crossword clue (k) Sound heard when a telephone is picked up (2 words).

Possible Answers:

• DIALTONE

Related Clues:

• "It's okay to call now" signal
• Open line indicator
• Phone drone
• Receiver sound
• Signal to place a call

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