Suggests quick communication, as there's no waiting to connect a call.

Immediate Response

Need to check availability; another person might be using the line.

Not Always Free

Implies privacy concerns, as others could listen in on the line.

Indicates real-time conversation with listeners on air during a broadcast.

Used by broadcasters to involve their audience directly in the program.

Callers should express thoughts clearly and briefly due to limited time.

An open line of credit lets you borrow different amounts, not just a lump sum.

Remember that an open line has a maximum amount you can borrow.

Highlights availability of a rail service for commuting or travel.

An open line implies the railway is operational and not under maintenance.