The CX2970x family implements one, two or four-channel ATM and packet-over-SONET/SDH (POS) processing functions at 155.52 Mbps. The components contain both the PMD and TC sublayers and feature UTOPIA Level 2 interfaces to the ATM layer and POS-PHY Level 2 interfaces to the link layer. They also include dedicated serial ports for the insertion and extraction of the DCC overhead bytes.
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