Avaya P580 - Manual (Page 30)

1-2 Avaya P550R, P580, P880, and P882 Multiservice Switch User Guide, v5.3.1
Chapter 1
Hardware Components
The Avaya Multiservice switch includes the following hardware
components:
Chassis
The Avaya switch chassis comes in four models:
■
The P550R and P580 chassis
■
The P880 and P882 chassis.
The P580 and P882 chassis can run in two modes:
■
Fabric Mode 1 = 55MHz or Fabric_mode 1
■
Fabric Mode 2 = 66Mhz or Fabric_mode 2
Fabric Mode 1
Fabric mode 1 has a switching fabric performance of 1.76 Gigabits
per second per fabric port. Fabric mode 1 modules operate at 55MHz
only. The presence of any 50-series modules within the chassis will
cause the chassis to operate in Fabric mode 1. P550R and P880
operate only in Fabric Mode 1.
In Fabric mode 1 the P550R/P580 chassis will have a 13x13 crossbar
switching fabric, while the P880/P882 chassis will have a 16x16
cross bar switching fabric. In addition, the P880/P882 chassis is
limited to sixteen functional slots in this mode (slot 17 can not be
used).
Fabric Mode 2
The 80-series platform is an evolution of the 50-series architecture.
It offers a 20% increase in switching fabric performance or 2.11
Gigabits per second per fabric port. This allows greater 10/100/1000
port density on a per crossbar port basis.
This increase in performance is accomplished with Avaya
Application-Specific Integrated Circuits (ASICs) that operate at
66MHz (as well as 55MHz capable) and consolidates and enriches
the functionality of a number of ASICs used in the
50-series modules.
This increased performance can only occur if the entire switch
contains 80-series modules. The presence of any 50-series modules
within the chassis will cause the chassis to operate in Fabric mode 1
(they will not power up in Fabric_mode 2).