下面的内容摘自柯林斯英语词典，供参考：

telesales（不可数名词）电话销售；电话推销

释义：

Telesales is the selling of a company’s products or services by telephone, either by phoning possible customers or by answering calls from customers.

例句：

Many people start their careers in telesales. 许多人都是从干电话销售做起的。

There are a wealth of telesales jobs advertised. 广告里有大量电话销售的岗位。