Panasonic Digital Business System - Installation Manual
March 1997
Issue 5
13
Connection Of Exchange Lines And Extensions
To comply with EMC Directive 89/336/EEC and it amendments 92./31/EEC and 93/68/EEC, EMI filters must be
installed as per the EMI Filter Installation section later in this manual.
Connection of exchange line and extension wiring to the DBS is made via proprietary DDK connectors supplied
with the CCU. Additional connectors can be obtained as spare part items.
Each DDK can accommodate two exchange or extension connections.
The DBS can be directly wired to the Network Test an Termination Point (NTTP) via DDKs, however it is
recommended that an Intermediate Distribution frame (IDF) is installed and the exchange and extension wiring
jumpered across to the wiring running to the DBS.
Figure 6 - Recommended Connection Schematic
Attaching A DDK Connector
1
Open the DDK.
2
Insert the wires to connected into the four holes on the flap.
3
Ensure the wires do not slip out of the holes and close the DDK using a pair of pliers to press the two parts
firmly together. The blades in the second section of the DDK will cut through the insulation on the wire and
make contact with the conductor.
4
Plug the completed DDK into the appropriate port connection on the Master Distribution Frame (MDF) at
the top of the DBS CCU.
