Because the telephone company USES DNIS to send the number, there is no need for operator intervention to route the call.

由于电话公司使用DNIS传送电话号码，因此就不需要话务员转接电话了。

youdao

Because the telephone company USES DNIS to send the number, there is no need for operator intervention to route the call.

由于电话公司使用DNIS传送电话号码，因此就不需要话务员转接电话了。

youdao