In early electromechanical switches switches including Panel switch a "District Junctor" handled supervision and talk battery duties for outgoing calls, while the junctors for incoming calls were simple three-wire connections between the incoming frame and the line frame.
Switches switches including Panel switch a "District Junctor" handled supervision and talk battery duties for outgoing calls, while the junctors for incoming calls were simple three-wire connections between the incoming frame. This was in early electromechanical. Switches switches including Panel switch a "District Junctor" handled supervision and talk battery duties for outgoing calls, while the junctors for incoming calls were simple three-wire connections between the line frame. This was in early electromechanical.