at call

at call  {adj.} or  {adv. phr.}
1. Ready or nearby for use, help, or service; on request.
Thousands of auto insurance agents all over the country are at the insured person's call, wherever he may travel.
2. At the word of command; at an order or signal.
The dog was trained to come at call.
Categories: call {adj.} {adv. phr.}

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