I can't get a dial tone on this phone.

我在这部电话上听不到拨号音。

《柯林斯英汉双解大词典》

I've been looking around for a "commercially supported cloud-based VOIP PBX that provides dial tone" for the past few weeks and I keep coming up empty on the SIP phones.

在过去的几周里，我四处在寻觅着一个“商业支撑下、基于云的并可提供拨号音的网络电话交换机”，而一直无法享用SIP电话。

youdao

Find a cloud based VOIP PBX out there that is commercially supported that provides dial tone.

找到一个基于云的网络电话路由器，该设备还提供拨号音。

youdao

The dial tone is that state of awareness of the divine that Buddy speaks of when he says- when he speaks of being with God before God said, "Let there be light."

拨号音是神学意识的体现,巴蒂曾提过，当他提到在上帝说,让光芒普照大地，这句话前就与上帝同在时说过“

耶鲁公开课 - 1945年后的美国小说课程节选

The Web site is gone, and phoning the group's New York office yields a dial tone.

FORBES: Endorsement Rap

If I timed it right, he'd only hear a dial tone and I would be safe.

ENGADGET: Growing up Geek: Philip Berne Alt

You then had to wait hours for a dial tone, and pay exorbitant charges.

ECONOMIST: Press freedom