"When we heard nothing from you, I sent a call of distress."

She sent a call to her party, which was spread across the nearby hills.

"Don't you know the men in that machine could send a call back before they were knocked out?"

The system can be programmed to send calls to a home or a hotel.

They'd find the communications device and realize he'd sent a call for help.

When his funds ran low, Doc would send a call for gold.

The other planets of this star system do not have a technology advanced enough to send such a call.

Maybe then, she could think about sending a call for help, though the communications center was way on the other side of the installation.

I don't usually try to send telepathic calls over any kind of distance.

His success, she said, should send a wake-up call to the Mayor.