The DS3112 T3/E3 Multiplex-Framer contains all the digital logic required to communicate over T3 and E3 transmission lines. Supporting both channelized and unchannelized operation, the DS3112 enables low-cost T3/E3 linecards that can be deployed in a variety of voice and data applications worldwide. Applications * Access Concentrators * ATM and Frame Relay Equipment * Digital Cross-Connects * PBXs * Routers/Switches * SONET/SDH and PDH Multiplexers * Test Equipment * Five Operating Modes * M13 multiplexing (28 T1s to DS3) * E13 multiplexing (16 E1s to E3) * G.747 multiplexing (21 E1s to DS3) * Unchannelized DS3 framing * Unchannelized E3 framing * M13 or C-Bit Parity DS3 framing * G.751 E3 framing * Alarm generation and detection * HDLC controller with 256-byte FIFOs * FEAC controller * BERT (Bit Error Rate Tester) * Two T1/E1 add/drop ports * 27mm x 27mm 256-lead BGA package