callers
n．访客，来访者：到某人家中拜访的人。
例句
Hundreds of callers jammed the switchboard for more than an hour.
上百个来电者堵塞了总机一个多小时。
《柯林斯英汉双解大词典》
She ushered her callers into a cluttered living room.
她把来客们带到一间杂乱的客厅。
Callers dialling the wrong area code will not get through.
打电话的人拨错区号时电话就接不通。
