Also, many of the IP telephony vendors are now focused on SIP as the control protocol for their IP telephony deployments.

另外，许多IP电话技术供应商现在都把SIP作为IP电话技术部署的控制协议。

youdao

This paper presented the virtual telephony network, P_VPN. The architecture of P_VPN includes management layer, transmission layer and control plane.

文章提出了电话虚拟专网P_ VPN安全模型，其体系包括管理层、传输层和控制面。

youdao

That provision does to telephony what rent control does to new and existing housing.

FORBES: Fact and Comment