In APCO 10-codes, 10-21 refers to "Telephone" or "Telephone Call."
This code is commonly used to indicate that an officer or unit needs to communicate with someone via telephone, whether it's to make a call or receive one. It can also be used to instruct an officer to contact someone by phone for information or updates.
For example, a dispatcher might say:
- Dispatcher: "Unit 3, please 10-21 the station."
- Officer: "Unit 3, roger that. I will call the station."
Using 10-21 helps maintain clear communication protocols among emergency responders and ensures that important information can be relayed efficiently.