at call —(also: on call) 1. (of a doctor, etc.) available if required:
- She served as president, then … twenty years as treasurer, always at call, and handling the money carefully.
2. (of money, etc.) available on demand:
- As a first step, I secured my vast property, so that the income would be certain, and always at call.
within call—near enough to be summoned by calling:
- Ross was still away on duty, and there was nobody except the native servants within call.