3Com DSA-3CV1100-02 service manual Punch-down Block with a Patch Panel

Preparing the Site for the VCN Access Concentrator 23

Installing the VCN To install the VCN AP punch-downblock when there is a patch panel, Access Point perform the following steps:

Punch-down Block with a Patch Panel

1Select the wire pairs according to their position in the RJ-11 telephone connector in the rear of the VCN AP. The two outside wires comprise the outer wire pair and the two inside wires comprise the inner wire pair, as shown in Figure 7 and Figure 8.

Where there is only one telephone line in a room, the two wires are connected to the inner wire pair of the phone connector shown in Figure 7 and Figure 8. The outer wire pair of the phone connector is not used.

■The inner wire pair carries both voice and digital date.

■The outer wire pair carries only voice.

Figure 7 VCN Access Point Rear Pane

P H O N E L IN E D C -IN

Figure 8 The Four Wires of the Telephone Cable

Inner wire pair

Outer wire pair

2Disconnect the punch-down Krone connector for the inner wire pair from the PBX punch-down block.

The outer wire pair remains connected to the PBX punch-down block since it will not carry data.