3Com DSA-3CV1100-02 - page 26

26 CHAPTER 2: INSTALLING THE VCN ACCESS CONCENTRATOR
outer wire pair and the two inside wires comprise the inner wire pair, as
shown in Figure 10 and Figure 11.
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 10 and Figure 11. 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 only carries voice.
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.
Figure10 VCN Access Point Rear Panel
Figure11 The Four W ires of the Telephone Cable
3Connect the punch-down Krone connector of the inner wire pa ir to the
added VCN AP punch-down block. Refer to Figure12.
PHONE LINE DC-IN
Inner wire pair
Outer wire Pair