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Cisco MGX 8230 Edge Concentrator Installation and Configuration
Release 1.1.31, Part Number 78-11215-03 Rev. B0, May 2001
Chapter2 Module and Service Descriptions
Processor Switching Module
PXM1 Features
The PXM1 (Figure 2-1) is a combination ATM switching fabric, data processing, and ATM interface
card. This module combines a 1 .2 G b ps sh ar ed - m em or y s wit ching fabric with integrated trun k in g at
speeds up to OC-12. The switching fabri c provides 1.2 Gbps of non-blocking switch ing capacity, while
the processor provid es t h e co n trol plane that deliver s I P + ATM netwo r ki ng s o ftware, diagnostics, an d
performance monito ring .
The PXM provides int egrated switching, pro cessing, and broadba nd interfaces to provid e the following
high-performance switching and trunking features:
•1.2-Gbps non-blockin g swit ch ing
•Integrated T3/E3, OC-3c/STM-1, OC-12c/STM-16
•ATM trunking
•Linear Automatic Protection S w it ch in g for th e SONET interfaces. Note that AP S i s availabl e for
only the “B” models of the OC-3 and OC-12 uplink cards.
•Hot card insertion/ removal
•1:1 hot standby redundancy
•User-selectable primary and secondary clock sources with graceful switchover
•Internal Stratum-4 or optional Stratum-3, external BITS, or inband clock sources
•Inband management or out-of-band via EIA/TIA-232 or 10BaseT control ports
•Narrowband service modules
•Broadband trunking support
•DSO to OC-12c/STM-4 interfaces supported
PXM1 Illustration and LED Description
PXM1 provides connectors for external aud io and visual alarms. The interface can either be always open
or always closed. Major and minor al arms are controlled separately. An alarm cu toff button is accessible
from the front. A history LED is set when the alarm cutoff button is pressed. The history LED can be
cleared by pressing the history clea r button on the faceplate.
The PXM1 provides the follow in g in d ica tors:
•System Status Active/Standby/Fail/standby update (green/yellow/red/flashing yellow)
•Critical alarm (blue)
•Major alarm (red)
•Minor alarm (yellow)
•DC OK A (green = OK, red = not OK)
•DC OK B (green = OK, red = not OK)
•ACO (green)
•History (green)
•Port activity (active and clear = green , r emo t e al arm = yellow, local alarm = red)
•LAN activity (flashing gr een)