A transmission line connecting parts of a system, especially a telephone line connecting two private branch exchanges.
连接线；（尤指连接专用交换分机的）电话直接连接线
Example sentencesExamples
Queuing for callers on hold is performed at the edge of the network, helping reduce the need for overflow ports and expensive tie lines between multisite contact centers.
We utilized radio tie lines.
The access points are interlinked with additional infrastructure including switches and tie lines.
They connect only through tie lines where power must be converted from alternating current to direct current and back again.
Definition of tie line in US English:
tie line
nounˈtī ˌlīn
A transmission line connecting parts of a system, especially a telephone line connecting two private branch exchanges.
连接线；（尤指连接专用交换分机的）电话直接连接线
Example sentencesExamples
They connect only through tie lines where power must be converted from alternating current to direct current and back again.
The access points are interlinked with additional infrastructure including switches and tie lines.
Queuing for callers on hold is performed at the edge of the network, helping reduce the need for overflow ports and expensive tie lines between multisite contact centers.