R96DFX

The Rockwell R96DFX MONOFAX modem is a synchronous 9600 bits per second (bps) half-duplex modem with error detection and DTMF reception. The modem is housed in a single VLSI device package. The modem can operate over the public switched telephone network (PSTN) through line temtinations provided by a data access arrangement. The Fl96DFX is designed for use in Group 3 facsimile machines. The modem satisfies the requirements specified in CClTT recommendations V.29, V.27 ter, V.21 Channel 2, and T.4, and meets the binary signaling requirements of T.30. The modem can operate at 9600, 7200, 4800, 2400, or 300 bps, and also includes the V.27 ter short training sequence option. The modem can also perform HDLO framing according to T.30 at 9600, 7200, 4800, 2400, or 300 bps. The modem R96DFX features a programmable DTMF receiver and three programmable tone detectors which operate concurrently with the V.21 channel 2 receiver. The voice mode allows the host computer to efficiently transmit and receive audio signals and messages. The modem is available in either a 68-pin plastic leaded chlp carrier package or a 64-pin quad in-line package Figure 1 shows the modem in the PLCC package. The general modem R96DFX interface is illustrated in Figure 2. The modem's small size and low power consumption allow the design of compact system enclosures for use in both office and home environments. Additional modem information is described in the 9600 bps MONOFAX modem designer's guide order No.

The features of R96DFX can be summarized as (1)group 3 facsimile transmission/reception: CClTT V.29, V.27 ter, T.30, V.21 Channel 2, T.4; HDLC framing at all speeds; (2)V.27 ter short train; (3)concurrent DTMF, FSK, and tone reception ; (4)voice mode transmission/reception ; (5)half-duplex (2-wire); (6)maximum transmit level: 0 dBm programmable to -15 dBm; (7)receive dynamic range: dBm to -43 dBm; (8)programmable dual tone generation; (9)programmable tone detection; (10)programmable turn-on and turn-off thresholds; (11)programmable interface memory interrupt ; (12)diagnostic capability: allows telephone line quality monitoring; (13)equallzation: automatic adaptive; compromise cable (selectable) ; (14)DTE interlace: two alternate ports: selectable microprocessor bus (6500 or 8085); CClTT V.24 (EIA-232-D compatibie)- interface ; (15)TTL and CMOS compatible; (16)low power consumption:370mW; (17)compatible with R96MFX and R96EFX moderms.

The absolute maximum ratings of  R96DFX are (1)operating temperature:0°C to 70°C; (2)storage temperature: -55°C to 125°C; (3)relative humidity: up to 90% noncondensing, or a wet bulb temperature up to 35°C, whichever is less.