NEC 2400 ipx Bedienungsanleitung PDF herunterladen (Seite 244)

CHAPTER 3 ND-71548 (E)

Page 226

Issue 2

INSTALLATION PROCEDURE

10. CROSS CONNECTIONS FOR DIGITAL INTERFACES

Perform the cross connections for digital interfaces as shown below:

Note 1: When your system is single IMG configuration, Time Division Switch (TSW) card is equipped with Phase

Lock Oscillator (PLO). Therefore, dedicated PLO card is not required when using Digital Interfaces. How-

ever, when the system requires a higher-precision oscillator, use the Oscillator (OSC: PA-CK14) card. The

cards may be mounted in slots numbered 9, and 17 of PIM0. For the OSC card, no external wiring is re-

quired.

Note 2: Provide the necessary cross connections at the MDF by using copper wires of 0.5 mm diameter (24 AWG).

2-core twisted wire is used for speech path, and single-core wire is used for control wire. It is recommended

that wires of different colors be used for trunks, station lines, PFT, etc., so that they can easily be distin-

guished.

NAP-200-015

Sheet 26/32

Cable Termination and Cross

Connections from MDF to Peripheral

Equipment, C. O. Lines, and Tie Lines

START

Checking terminal

locations on the

Module Group

side of the MDF

Digital Trunk

(DTI, CCT, PRT)

Referring to the Port Accommodation

sheet and description of Digital Trunk

card in the “Circuit Card Manual,”

identify the lead names for the Digital

Trunk card and the terminal locations

of the leads.

PLO leads Referring to Figure 015-20/Figure

015-21 to identify the lead names and

the terminal locations for the PLO.

Cross Connection

Note

When accepting synchronization

clocks from other node (master or

submaster node)

Referring to Figure 015-24/Figure

015-25, provide the necessary cross

connections.

When accepting synchronization

clocks from External High-Stability

Oscillator

Referring to Figure 015-22/Figure

015-23, provide the necessary cross

connections.

END

WARNING: Back card out of the module before attempting cross connection. Otherwise, the fuse mounted

on the DTI card will blow and the card will become inoperative.

1 2 ... 239 240 241 242 243 244 245 246 247 248 249 ... 427 428

Kommentare zu diesen Handbüchern

Keine Kommentare

NEC 2400 ipx Bedienungsanleitung Seite 244

Kommentare zu diesen Handbüchern

Verwandte Produkte und Handbücher für Telefone NEC 2400 ipx