Oc-192 Packet-Over-Sonet/Dynamic Packet Transport Plims - Cisco CRS-1 System Description

OC-192 Packet-Over-SONET/Dynamic Packet Transport PLIMs

• STATUS LED: Green indicates that the PLIM is properly seated and operating correctly. Yellow or
• Power consumption: 65 W
OC-192 Packet-Over-SONET/Dynamic Packet Transport PLIMs
The OC-192 PLIM contains four ports that can be software configured to operate in packet-over-SONET
(POS) or Dynamic Packet Transport (DPT) modes. The OC-192 PLIM provides Layer 1 and Layer 2 interface
capabilities for four OC-192 data steams by removing and adding the proper Layer 1 and Layer 2 header
information as data packets enter and exit the PLIM. The OC-192 PLIM feeds the MSC with one 40-Gbps
data packet stream. The OC-192 PLIM has features described in
Note DPT mode is not available at this time.
Table 7: Features of the OC-192 PLIM
Feature
Optics modules
Framers
Physical interface controller
DPT or transparent mode
components
Additional components
The Cisco IOS XR software also provides loopback and diagnostic functions for the OC-192 PLIM.
The four different types of optics modules define the four major variants of the OC-192 PLIM:
• Long-reach (LR), Product ID: OC192-POS/DPT-LR=
• Intermediate-reach (IR), Product ID: OC192-POS/DPT-IR=
• Short-reach (SR), Product ID: OC192-POS/DPT-SR=
Cisco CRS Carrier Routing System 8-Slot Line Card Chassis Enhanced Router System Description
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• CARRIER: Indicates that the receive port (RX) is receiving a carrier signal. The LED goes out
(turns dark) if a loss-of-signal (LOS) or loss-of-frame (LOF) condition is detected.
• RX PKT: Blinks every time a packet is received.
amber indicates a problem with the PLIM. If the LED is off (dark), check that the board is properly seated
and that system power is on.
Description
Provide the receive (RX) and transmit (TX) optic interfaces in accordance with
GR-1377 for long-reach (LR), intermediate-reach (IR), short-reach (SR), and
very-short-reach (VSR).
Provide processing and termination for SONET Section, Line, and Path layers.
This includes alarm processing and automatic protection switching (APS)
support. The framer supports both packet and cell processing for a multiservice
operating mode.
Provides data packet buffering and Layer 2 processing and multiplexing and
demultiplexing the four OC-192 data streams. This includes processing for
VLANs and back-pressure signals from the MSC.
Provide the MAC layer function for the Spatial Reuse Protocol used in the DPT
mode. When the PLIM is in POS mode, these components operate in the
transparent mode.
Provide power, clocking, voltage and temperature sensing, and an identification
EEPROM that stores initial configuration information and details about the
PLIM type and hardware revision.
Line Cards and Physical Layer Interface Modules Overview
Table 7: Features of the OC-192 PLIM.