Nortel Networks OPTera Metro 3500 - Manual (Page 285)

Hardware feature descriptions 3-57
Planning and Ordering Guide—Part 1 of 2 NTRN10AN Rel 12.1 Standard Iss 1 Apr 2004
Alarms and TBOS
Office alarms, TBOS, and environmental I/O are under the control of the SPx.
The SPx monitors all circuit packs in the system for problems. When a
problem arises in any area, the SPx registers the problem in its alarms database
so that the alarm can be retrieved by a user in a TL1 session.
Reset button
When the reset button is pressed, the SPx software and hardware initialize.
During the initialization process, all the LEDs on the SPx turn on, SDCC
communications with the shelf are unavailable, and RS-232 communications
with the shelf are unavailable. The SPx reset button should only be used when
the SPx is not responding.
Section data communication channel (SDCC)
The SPx controls the section data communications channels (SDCC). All
remote TL1 sessions use SDCC as the communications link between network
elements.
Equipping rules
The SPx must be installed in slot 15. See Table 3-3 on page 3-6 for operational
temperature ranges.
It is possible for a shelf to carry traffic and maintain equipment and path
protection switching without an SPx. If the SPx fails or is removed, all
communications and performance monitoring with the shelf are inactive.
Alarm LED definitions
The following table provides a list of LEDs of the SPx.
Extended network processor (NPx)
(NTN424BA, BH)
The extended network processor (NPx) provides network level control. The
NPx supports TCP/IP, X.25, and a seven-layer OSI stack. The NPx
communicates with Preside Site Manager and the Multiservice Managed
Object Agent (MOA) over TCP/IP. It supports TL1 communication over X.25
with other operations support systems (OSS).
LED Color Description
Status Red Circuit pack failure
Yellow Loss of one or more SDCC connections or
TIA/EIA-232 connection
Active Green In service