User's Manual

NDA-24300 CHAPTER 5
Page 329
Issue 1
FAULT REPAIR PROCEDURES
3. ATTCON/DESKCON FAULT
This section explains the fault repair procedure when a specific Attendant Console (ATTCON) is in any of the
following faulty conditions.
• No speech can be made.
• No operations can be made.
3.1 Check Point
When repairing an ATTCON/DESKCON fault, consider the following items:
(1) Check the cable connections on the backplane.
(2) When replacing the ATI circuit card for master ATTCON/DESKCON, the system is placed under Night
Mode during replacement procedure.
(3) When replacing the master ATTCON/DESKCON, the system is placed under Night Mode during replace-
ment procedure.
3.2 ATTCON/DESKCON Control
Each ATTCON/DESKCON is controlled from an ATI (PA-CS33) circuit card. The ATI circuit card is con-
trolled from the CPU card via the INT on the TSW card. Figure 5-3 shows the control route of the ATI
circuit card.
The ATI (PA-CS33) circuit card is used as an interface card between the PBX and ATTCON/DESKCON.
The card is mounted in Slots 12 or 23.