Switch Fabric Front Module
Plexus 9000 Planning and Engineering Guide
Issue 2, April 23, 2004
Section 130-120-300
5-92
5.7.2 Functional
Description
The SW/FAB modules are located in slots 10 and 12. These modules
provide full 1:1 redundancy for critical switching resources resulting in
true non-stop operation. Each switch fabric module has twenty-four 622
Mb/s ports providing a total usable bandwidth of 15 Gb/s.
The switch fabric modules also provide redundant communication
interfaces between the system processors and every other module in the
chassis. All operations, management and protection messages are
converted to ATM cells on each switch fabric module and delivered to the
other modules over the cell stream on the midplane.
5.7.2.1 Improvements
There are four revisions of the SF module.
•
Revision A (CLEI code BAC7W30JAA) supports DS-1 and Triple
DS3 IOMs.
•
Revision B (CLEI code BAC7W3UJAA for 89-0363-B)
additionally supports the Octal DS3 module which requires
Midplane II of the 89-3003 or 89-3004 chassis.
•
Revision C (CLEI code BAC7W3YJAA) provides the capacity for
Telica support personnel to upgrade SF firmware. When used with
the Dual System Processor, processing power and the maximum
number of standing calls is increased.
•
Revision D (CLEI code BAC7W3YJAB) provides the same
features as revision D.
5.7.2.2 Limitations
The functions, IOMs that are supported, and limitations of the SF module
are determined by the System Processor (SP) and the Midplane. Refer to
Table 5.7-A.
5.7.2.3
General Mechanical Representation
The front SW/FAB module is approximately 14 inches high.
Figure 5.7-1
provides an illustration of the midplane, the module and the front plate.
Refer to
Table 5.7-B
for a description of the LEDs.