Avaya S8700 Maintenance Manual page 1748

Maintenance-Object Repair Procedures
The PN's Maintenance circuit pack must be physically inserted into the dedicated
slot marked Maintenance in the A carrier of the PN. The serial links from the PN's
Maintenance circuit pack to the Expansion Interface circuit packs are physically
connected from this dedicated slot to slots 2A01 and 2B02 (2B02 is used only if
there is duplicated Port Network Connectivity). The serial link from slot 2A01 to
the maintenance slot is hard-wired into the backplane of carrier A, whereas the
serial link from slot 2B02 to the maintenance slot is a ribbon cable connecting the
two slots. The serial link from the PN's Maintenance circuit pack to the terminal is
also a ribbon cable which plugs into a connector labeled TERM on the back of
carrier A.
The maintenance strategy for the PN's Maintenance circuit pack consists of
checking the integrity of the communications path to/from the PN's Maintenance
circuit pack, testing individual hardware components on the PN's Maintenance
circuit pack, and keeping the alarm LEDs up-to-date. The individual hardware
components include the serial interfaces which handle the serial links connected
to the PN's Maintenance circuit pack. There are three serial interfaces, one for
each possible Expansion Interface circuit pack and one for the terminal.
Since the PN's Maintenance circuit pack supports environmental maintenance in
the PN, trouble with the PN's Maintenance circuit pack can cause environmental
maintenance to falsely detect problems. In a multicarrier cabinet PN, these
environmental MOs include: POWER (Battery and Battery Charger), CARR-POW
(Carrier Port Power Unit), AC-POWER (AC Power), CABINET (Cabinet Sensors),
EMG-XFER (Emergency Transfer), EXT-DEV (External Device Alarm), and
CUST-ALM (Customer-Provided Alarming Device). In a single carrier cabinet PN,
these environmental MOs include DC-POWER (Single Carrier Cabinet Power),
EMG-XFER (Emergency Transfer), EXT-DEV (External Device Alarm), and
CUST-ALM (Customer-Provided Alarming Device).
TN775D Maintenance Circuit Pack
Used with a TN2312AP IPSI Circuit Pack
Connectivity when installed in an Existing System
There is no backplane connectivity from the TN775D Maintenance circuit pack to
the TN2312AP IPSI circuit pack in existing pre-R11carrier backplanes. To
achieve connectivity for pre-R11 carriers, a faceplate cable must be used. The
faceplate cable runs between the TN775D and the TN2312AP IPSI circuit packs
faceplates.
NOTE:
The TN775D maintenance circuit pack is located in slot one of Control
Carrier A. The associated TN2312AP IPSI circuit pack is located in slot two
of Control Carrier A.
8-1026 Issue 1 May 2002 555-233-143