MULTIPORT SYNC ASYNC MOD 4 INDEPENDENT RS232 PORT ADTRAN solutions maximize performance, lower costs, and help companies achieve the best return on investment. ADTRAN is committed to achieving success for customers by offering "best-in-class" products with outstanding value. Let ADTRAN work for you. PRODUCT FEATURES: Four (4) port serial interfaces (RS232); Asynchronous or synchronous subrate multiplexer; Port 1 supports rates up to 64 kbps; Ports 2-4 support rates up to 38.4 kbps; Aggregate 60 kbps data rate (75 � 800 bps); DTE rates: Port 1 Sync: 2.4, 4.8, 9.6, 19.2, 38.4, and 64 kbps; Port 1 Async: 2.4, 4.8, 9.6, 19.2, and 38.4 kbps; Ports 2-4, Sync/Async: 2.4, 4.8, 9.6, 19.2, and 38.4 kbps; Each port configured as DCE interface; Supports V.24 control and data signals per port: RTS, CTS, DSR, and DCD control signals; RxC and TxC timing signals; RxD, TxD, and Signal Ground; Network and DTE loopbacks on a per port basis; SNMP support; Single, high density, miniature connector; Adapter cable (10 ft.) breaks out 4 - DB25 connectors from the high density miniature connector; Occupies a single access module slot; Extended operating temperature range from - 40�C to +65�C; Designed to meet NEBS and UL standards (inside plant wiring only).