M0201ABK_uc
ERA® WCS and e-POI Subracks and Power Supply Unit Installation Guide
© June 2021 CommScope, Inc.
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WCS-2 and WCS-4 Subrack Overview
CPRI Digital Donor Card
A CPRI Digital Donor (CDD) Card installs into a Classic CAN or WIN to provide a digital CPRI interface between
a Nokia BBU and the WCS Subrack, and to distribute CPRI signals to connected APs.
CDD Card CPRI Ports
Each CDD Card has six SFP ports, as shown below. Each port provides one CPRI link between the BBU and the
CDD Card. While MSA compliant, the CPRI ports are designed for a specific line rate offered by Nokia.
Maximum transceiver power per CPRI Port is 2W.
CDD Cards natively support LTE configurations. Please check the ERA version to determine if the software
supports DSS and 5GNR configurations.
Do not use CommScope ERA SFP+ Modules in the CDD Card. Contact your local Nokia sales representative
to obtain the required number of SFP Modules for this installation.
Six CPRI ports