General Description
The VSC9112 is a dual mode STS-48c/STM-16c Packet/ATM mapping device. In Packet over SONET (POS) mode, this device can be used in equipment interconnecting IP/PPP/HDLC data over public or private SONET/SDH networks. Similarly in the ATM mode, this device can be used in equipment interconnecting enterprise ATM switches.

FEATUREs:
System / Packet Interface
• 32-bit Industry Compliant POS-PHY-3, Single-PHY Packet Interface
• 32-bit Industry Compliant UTOPIA-3, Single-PHY Cell Interface

Physical Layer Channelization Support
• STS-48c / STM-16c

Payload Processing
• Transparent Mode - Direct SPE Mapping
• ATM Cell Processing
• Programmable HDLC / PPP Encapsulation

SONET / SDH Processing
• Full Section, Line, and Path Termination and Generation
• Performance Monitoring and Reporting
• Enhanced Bit Error Rate Monitoring
• Section and Path Trace Buffers
• Full Overhead Insertion and Extraction and Status Monitoring Through Dedicated Access Ports

Line Interface
• 16-bit 155 MHz Line Interface
• Synchronization for STS-192 Applications

Special Features
• Extensive Packet / Cell Performance Monitoring Features
• 16 Kb Packet / Cell FIFO for Full Packet Encapsulation
• Programmable Error Discarding and Label Filtering
• Rx and Tx Timestamp Feature for Performance Monitoring Applications

Miscellaneous Features
• Generic 8-bit CPU Interface
• Compliant JTAG Boundary Scan Interface
• Five Loopback Modes for Test and Diagnostic Applications
• 0.35 micron CMOS, 352-pin SBGA, 3.0 Watts Maximum