sygnał wywoławczy

This call sign must stay with the message to the point of delivery.

Let me know your call sign when you check out with operations.

It had stuck all these years, as first call signs usually do.

Each call sign may be used for 15 days from its issue.

I tried the call sign three times with no answer.

That's your call sign, at least the one you're using on this mission.

Immediately he heard a man speaking his call sign on the radio.

Both will have the same call sign as the main signal.

"He used the other call sign and we all bought it!"

Each country has a different set of patterns for its own call signs.

Since then, the format and call letters have changed several times.

"Otherwise, he could not call and write letters to so many people."

How is my radio able to display the stations call letters?

The current sports format and call letters were first used in April 2003.

In March 2001, the station returned to the air with its current programming and call letters.

The current format and call letters were chosen in the early 1990s.

Manuscripts survive of letters he sent to his brother, also called Robert.

The folks at home will call and write letters.

In February 1992, the station underwent a series of changes, including format and call letters.

Station has operated under various ownership, but on the same frequency and call letters for the last 75 years.