The acronym STD written on Telephone booth stands for __

The acronym STD written on Telephone booth stands for ___

Straight Telephone Dial Switch Telephone Dial Subscriber Telephone Dialing Save Telephone or Trunk Dialing

Correct Answer

Save Telephone or Trunk Dialing

Subscriber trunk dialling STD also known as subscriber toll dialing is a telephone numbering plan feature and telecommunications technology for the dialing of trunk calls by telephone subscribers without the assistance from switchboard operators.