Clue: Open line indicator
We have 1 possible answer for the clue Open line indicator which appears 1 time in our database.
Possible Answers:
Last seen in:
Related Clues:
- Telephone sound
- It may follow a click
- Phone drone
- Phone sound
- Hum on the line
- Caller's go-ahead
- Calling sound
- Indication of service availability
- Cell phone's lack
- 'Go ahead and call' sound
- One thing land-lines have that cellphones lack
- Landline signal
- Sound after a hang-up
- "Ready" signal of a kind
- Hum on a line