e/Off-hook tone

Information
has gloss	eng: The off-hook tone (also receiver off-hook tone or off-hook warning) is a telephony signal used to alert a user that the telephone has been accidentally left off-hook for an extended period, effectively disabling the telephone line. See permanent signal.
lexicalization	eng: Off hook tone
lexicalization	eng: off-hook tone
instance of	c/Telephony signals

Media
media:aud	Offhook Tone.ogg