NEC NDA-24300 manual Dlkc Card Replacement Procedure

UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE

2.3.3DLKC Card Replacement Procedure

The DLKC (PH-PC20) card is located in Slot No. 08 or 09 within the TSWM. The card’s main function is to provide all the Attendant/Desk Consoles with information such as termination/answer/release (abandoned) of ATT calls or idle/busy status of a station via the link of the TSW system. Use the fol- lowing procedures to replace the DLCK card with a spare.

Note: The system changeover of DLKC must be executed by the MBR key operation on the active GT (PH- GT09) card or by using the CMOD command. Before starting this work, confirm the system block diagram shown in Figure 4-16, or Section 12, System Control Procedures, in Chapter 6.

Replacement Procedure

WARNING

Use extreme care when operating the keys on the circuit card.

START

On the active GT (PH-GT09) card, set the MBR key UP. Then, return the key DOWN.

Check the ACT mode of the mate

Speech Path System.

On the DLKC (PH-PC20) card to be replaced, Set the MB switch UP.

A

ATTENTION

Contents

Static Sensitive

Handling

Precautions Required

System Changeover

Check the following lamp indications on the circuit cards to be affected and ensure that they are all OFF:

•TSW ACT (TSW cards)

•OPE/MB (DLKC card) Note

•MUX ACT (MUX cards)

Note: If the DLKC card to be replaced represents system status #0, all circuit cards with #0 status are totally affected. Check the cited cards' lamp indications. See Figure 4-16and Figure 4- 17.

Check the following lamp indications on the mate Speech Path Block and en- sure that they are all steady-green:

•TSW ACT (TSW cards)

•OPE/MB (DLKC card)

•MUX ACT (MUX cards)

OPE/MB lamp on the DLKC card is red.

NDA-24300CHAPTER 4

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