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49 C-DOT DSS MAX-XL

Chapter 5.

MDF - Installation

5.1. GENERAL

The MDF installation, on the RBM side, is similar to the MDF installation for C-

DOT-SBM RAX in respect of subscriber and trunk cabling. However the additional

cabling is required for RSU installation on the RBM side and on the parent

exchange side in respect of 16 PCMs between parent exchange and RBM.

5.2. DIGITAL TRUNK CABLE TERMINATION ON RBM TO MDF (FOR RSU

PCMS)

a) 16 PCMs i.e. L1 to L8, L17 to L24 are terminated on 4 Nos of 2/8 LSA

modules.

b) If 4 pair cable is used from TSU frame to MDF, terminations on MDF are

done as shown in figure 5.1 (a). If 8 pair cable is used from TSU frame to

DDF, terminations on MDF are done as shown in figure 5.1 (b).

c) Cables marked RNUU, RNVV coming from copy – 0 of TSU are terminated

on first 2/8 module as shown in figure. Cables marked RNXX, RNYY coming

from Copy – 0 of TSU are terminated on second 2/8 module as shown in

figure. For cables coming from copy – 1 of TSU termination is done on third &

fourth modules. Termination is done in the same way, as done for copy – 0

cables.

d) For digital trunk cable preparation using 4 pair shielded cable & placement

details, refer to sections 3.2.2.1 & 3.2.2.2. For digital trunk cable preparation

using 8 pair shielded cable & placement details, refer to section 3.2.2.3.

e) The grounding leads coming out from digital cables at the ends near MDF

can be crimped to a ring terminal and terminated on one of the screw & nut

holding same backmount frame as shown in Fig. 3.2 c.

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Multitech BL-Series Manual de usuario Pagina 51