Functional Overview
The VSC9112 is a dual mode SONET/SDH to Packet/ATM framing device. In the Packet over SONET (POS) mode, this device can be used in equipment interconnecting IP/PPP/HDLC equipment over public or private SONET/SDH networks. Similarly, in the ATM over SONET (ATM) mode, this device can be used in equipment interconnecting ATM switches. Features of the VSC9112 include: full insertion/extraction of the transport overhead, bit error rate and extensive SONET/packet/cell performance monitoring, packet/cell filtering and discarding functionalities, JTAG TAP controller, and an 8-bit CPU interface with 8 general purpose I/O ports.

FEATUREs
• Dual Mode STS-48c/STM-16c to Packet/ATM Framing Device for User Network Interface and Network Node Interface Applications
• Terminates and Generates SONET/SDH Section, Line, and Path Layers
• Dedictated Ports for Section/Line Overhead Access (Extraction/Insertion)
• Extensive SONET/Packet/Cell Performance Monitoring Features
• Programmable Packet/Cell Filtering and Discarding Functionalities
• Industry Compliant Drop Side Packet/Cell Interface for Single-PHY Applications
• Prepared for STS-192/STM-64 Applications
• Provides JTAG TAP controller Conforming to the IEEE 1149.1 standard
• Generic 8-bit Microprocessor Interface
• 16-bit PECL Interface to High-speed MUX/ DEMUX Transceivers
• +3.3V Power Supply
• 0.35 Micron CMOS Technology
• Compliant with SONET and SDH Requirements as Stated in ANSI T1.105, Bellcore GR-253-CORE and ITU-T G.707 Documents
• Compliant with PPP in HDLC-like Framing as Defined in IETF RFC 1619/1661/1662