to sever the connection (between the two―with the other)―cut off the communication (between the two―with the other)
to establish a connection (between the two―with the other)
I will get back to you soon.
The correspondence lapsed
of a communication, to reach someone
連絡してね。
will confirm and go back to you
また連絡ください
Contact about the proposed date
There is a connection between the two companies.