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NDA-24300 CHAPTER 4
Page 261
Issue 1
UNIT/CIRCUIT CARD REPLACEMENT PROCEDURE
1.3.3 IOC Card Replacement Procedure
The IOC (PH-IO24) card is mounted in Slot No. 02 and/or 03 of the LPM. The
card’s main function is to provide a serial interface between the system and its ex-
ternal equipment, such as the Maintenance Administration Terminal (MAT), Sta-
tion Message Detail Recording System (SMDR), Message Center Interface (MCI),
Property Management System (PMS), etc.
Replacement Procedure
ATTENTION
Contents
Static Sensitive
Handling
Precautions Required
• OPE lamp on the IOC card first
flashes and then becomes red.
• All I/O ports are closed and the
equipment, such as MAT and
SMDR, loses connections.
Note:
The text data (such as
billing information),
registered before this step,
will be safely transmitted
later. However, the data,
recorded after this step,
will not be sent out, and
instead is stored in the
buffer.
• OPE lamp on the IOC card goes
Extract the card from the LPR.
A
Turn ON the MB key on the card.
Turn ON the MBR key on the IOC (PH-IO24)
card to be replaced.
Set the keys on the new card, referring to the
card to be replaced.
The equipment connected to the I/O ports of each card (MAT, SMDR, etc.) cannot be used while
replacing the IOC card.
ATTENTION