INSTALLATION PROCEDURE

3.3 Cable Termination and Cross Connection from the MDF to the DSU

Cable termination and cross connection from the MDF to the DSU should be performed according to the flowchart below:

Note: Provide the necessary cross connections at the MDF by using copper of 0.5 mm diameter (24AWG). Dual core twisted wire is used for speech path, and single-core wire is used for control. It is recommended that wires of different colors be used for trunks, station lines, etc., so that they can easily be distinguished.

START

Check terminal location on

 

 

 

24DTI/30DTI Card

 

Referring to Figure 4-5, identify the

the PBX side of the MDF

 

 

 

24CCT/30CCT Card

 

lead names for those cards and the

 

 

 

 

 

 

terminal location of the leads.

 

 

 

 

PLO/TSW Card

 

Referring to Figure 4-6 through 4-7,

 

 

 

 

 

 

 

 

 

 

 

identify the lead names for the PLO/

 

 

 

 

 

 

TSW (Note) card and the terminal

 

 

 

 

 

 

location of the leads.

Cross Connection

END

When accepting sync. clocks from External High-Stability Oscillator

When accepting sync. clocks from other office (master or sub- master office)

Referring to Figure 4-8 or Figure 4-9, provide the necessary cross connections.

Referring to Figure 4-10 or Figure 4- 11, provide the necessary cross connections.

Note: For the 1-IMG system: the Phase Lock Oscillator function equipped with TSW card can be used for Digital Interface, and while the OSC (PA-CK14) card is used when the system requires a high precision oscillator.

ND-71762 (E)CHAPTER 4

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Issue 2

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Image 49
NEC ND-71762(E) system manual TSW Note card and the terminal