Cisco ASR 5000, Installation Manual

Page: 26 / 294

280 Gbps Redundancy Bus
The Redundancy Bus consists of multiple, full-duplex serial links providing packet processing card-to-line
card redundancy through the chassis' Redundancy Crossbar Cards (RCCs) as shown below.
Figure 5: RCC Logical View
Each RCC facilitates 28 links:
• One link with each of the 14 packet processing card slots
• One link with each of the line card slots
• The RCC in slot 40 supports line card slots 17-23 and 26-32 (upper-rear slots)
• The RCC in slot 41 supports line card slots 33-39 and 42-48 (lower-rear slots)
Each serial link facilitates up to 5 Gbps symbol rate, equivalent to 4 Gbps of user data traffic, in each direction.
Therefore, the Redundancy Bus provides 140 Gbps symbol rate (112 Gbps user data) of throughput per RCC,
280 Gbps symbol rate (224 Gbps user data) total for both.
OC-48 TDM Bus
The system also hosts a dual OC-48 TDM bus consisting of 128 independent TDM paths each consisting of
512 DS0 channels. This bus supports voice services on the system. Higher speed TDM traffic requirements
are addressed using the system's data fabric.
ASR 5000 Installation Guide
10
ASR 5000 Hardware Platform Overview
Midplane Architecture