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Cyan Z-Series Engineering and Planning Guide
Release 5.0
700-0023-05-00 Rev. 1
© 2013 Cyan, Inc. – All Rights Reserved.
P a g e
135
2.20 Ring Closure Modules
The Ring Closure Module (RCM) is a passive module located in an Electrical Fabric Module (EFM) slot of
the Z77 shelf. The RCM provides connectivity without external patching between two 2.5G-LME4
modules, or two MSE-1482 modules, or two PME-412 modules or two PME-216i modules.
RCMs are required and must be installed in Z77 horizontal EFM slots to support the following applications:
•
ODU1 Express cross-connect (OC-48/STM-16 express) between a pair of 2.5G-LME4 modules
•
Link aggregation using multiple ports between a pair of PME-412 modules or PME-216i modules
•
A TESI Express connection using a pair of PME-412 modules or PME-216i modules
•
An unprotected Ethernet drop over a protected TESI using a pair of PME-412 modules or
PME-216i modules
•
Cross-card connections and pass-through traffic between a pair of MSE-1482 modules
Figure 68: Ring Closure Module (RCM)
The table below shows the required RCM placement in the Z77 EFM slots for each supported line card:
Line Card
Z77 EFM Slots
MSE-1482
slots 1 or 3
PME-412
slot 3
PME-216i
slot 3
2.5G-LME4
slot 3
Note: RCMs are not required for Z22 or Z33 shelves.
2.21 XC-2800 Switch Fabric Modules
The XC-2800 is a unified packet and Optical Transport Network (OTN) switch fabric for the Cyan Z77 shelf
(Z77 and Z77 shelf v2). The XC-2800 module provides service versatility and increased switching capacity
for the Z77. The fully non-blocking design of XC-2800 switch-fabric provides 2.8 Tbps of capacity across
the Z77 backplane. Working in unison with currently available Z-Series high-performance service interface
modules, the XC-2800 can scale in excess of two billion packets-per-second (pps) of line-rate traffic
throughput.
The XC-2800 switch fabric module features and benefits include:
•
Leverages a modular architecture of four individual switch fabric modules with no single point of
failure, providing support for 1:3 redundancy; increasing network availability.
•
Carrier-grade design provides investment protection by enabling in-service upgrades for existing
Z77 customers.