Dell 1600n Service Manual - Page 153

ModemSFM336 specification

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Circuit Diagram 11.2.1.2 Modem(SFM336) specification • 2-wire half-duplex fax modem modes with send and receive data rates up to 14,400 bps V.17, V.33, V.29, V.27 ter, and V.21 Channel 2 - Short train option in V.17 and V.27 ter • PSTN session starting - V.8 and V.8bis signaling • HDLC support at all speeds - Flag generation, 0-bit stuffing, ITU CRC-16 or CRC-32 calculation and generation - Flag detection, 0-bit deletion, ITU CRC-16 or CRC-32 check sum error detection - FSK flag pattern detection during high-speed receiving • Tone modes and features - Programmable single or dual tone generation - DTMF receiver - Tone detection with three programmable tone detectors • Receive dynamic range: - 0 dBm to -43 dBm for V.17, V.33, V.29, V.27 ter and V.21 Channel 2 • Programmable transmit level: -9 to -15 dBm • Serial synchronous data • Parallel synchronous data • TTL and CMOS compatible DTE interface - ITU-T V.24 (EIA/TIA-232-E) (data/control) - Microprocessor bus (data/configuration/control) Service Manual 11-5

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Circuit Diagram
Service Manual
11-5
11.2.1.2
Modem(SFM336) specification
• 2-wire half-duplex fax modem modes with send and receive data rates up to 14,400 bps
V.17, V.33, V.29, V.27 ter, and V.21 Channel 2
- Short train option in V.17 and V.27 ter
• PSTN session starting
- V.8 and V.8bis signaling
• HDLC support at all speeds
- Flag generation, 0-bit stuffing, ITU CRC-16 or CRC-32 calculation and generation
- Flag detection, 0-bit deletion, ITU CRC-16 or CRC-32 check sum error detection
- FSK flag pattern detection during high-speed receiving
• Tone modes and features
- Programmable single or dual tone generation
- DTMF receiver
- Tone detection with three programmable tone detectors
• Receive dynamic range:
- 0 dBm to –43 dBm for V.17, V.33, V.29, V.27 ter and V.21 Channel 2
• Programmable transmit level: -9 to –15 dBm
• Serial synchronous data
• Parallel synchronous data
• TTL and CMOS compatible DTE interface
- ITU-T V.24 (EIA/TIA-232-E) (data/control)
- Microprocessor bus (data/configuration/control)