the pager and the queuing pager can be connected by a six-core network cable, or by an eight-core network cable according to the B-mark method. The pager-side connection adapter has built-in 232-to-485, that is, signal A {Line 3} and signal B {Line 6}. Lines 1 and 2 are connected to 12V+, lines 7 and 8 are connected to 12V-, and the pager-side is connected to the network module according to the window.