User ManualTable of ContentsIntroduction 171.1 Controllerless Modem Driver Overview71.1.1 Windows* Millennium Edition (Windows Me), Windows 2000, Windows XP, and Windows NT* 47Figure 1. WDM Driver Block Diagram81.1.2 Windows 95 and Windows 988Figure 2. VxD Mini Port Driver Block Diagram91.2 V.90/V.92 and V.34 Data Modes91.3 Modem Connection Overview10Table 1. DTE-to-DCE Data Rates for Each Mode11Table 2. DCE-to-DCE Data Rates for Each Mode11Table 3. DCE-to-ISP Data Rates for V.90 Mode111.4 AT Commands Overview111.4.1 Sending Commands12Table 4. DTE-Modem Data Rate Response Codes121.4.2 AT Escape Sequences131.4.3 Dial Modifier13AT Command Summary Tables 214Table 5. Data Mode Command Summary14Table 6. V.44/V.42/V.42 bis MNP Command Summary19Table 7. Fax Identity Command Summary21Table 8. Fax Class 1 Command Summary21Table 9. IS-101 Voice Command Summary22Table 10. Voice DTEÆDCE Character Pairs22Table 11. Voice DTE¨DCE Character Pairs23Table 12. Dial Modifiers24Table 13. S-Register Summary24Data Mode AT COMMANDS 3263.1 Using AT Commands to Access the S-Registers [Sn?, Sn=x, ?]263.2 Modem Responses and Command Echo [En, Vn, Xn, Wn, Qn]26Table 14. Data Reporting Wn Mapping27Figure 3. Example of a Remote Connection273.3 Modem Reset and NVRAM Commands [DS=m, Zn, &F, &Vn, &Yn, &Wn, &Zn=x]283.4 Modem Identification Commands [In, +FMI, +FMR, +FMM, +GMI, +GMM, +GMR, +GSN, +FMFR?, +FMDL?, ...29Table 15. Product Identification Information293.5 Establishing a Modem Connection [A, D, DS = n, S0]293.6 Online Command Mode [Escape Codes, On]303.7 Hanging Up [Hn, S10, Zn, &D2]303.8 Modem-to-Modem Connection Data Rates30Figure 4. Modem-on-Hold: Incoming Voice Call in Data Mode32Figure 5. Modem-on-Hold: Initiating a Voice Call in Data Mode33Table 16. Supported Modulation Types35Table 17. Resulting Modem-to-Modem Connection Rates with Non-Default Values363.9 Diagnostic Testing [S18, &Tn]363.9.1 Local Analog Loopback [AT&T1]36Figure 6. Local Analog Loopback Test373.9.2 Local Analog Loopback With Self-Test [AT&T8]37Figure 7. Local Analog Loopback with Self-Test373.10 AT Escape Sequences383.10.1 Time-Independent Escape Sequence383.10.2 Hayes* Escape Sequence40Table 18. Data Mode Command Descriptions40Error Correction and Data Compression 456Table 19. Operating Modes56Table 20. Resulting +ES Connection Types57Table 21. V.44/V.42/V.42 bis and MNP Data Modem Command Descriptions57Fax Class 1 AT Commands 5645.1 Fax Identity Commands64Table 22. Fax Identity Command Descriptions645.2 Fax Class 1 Commands64Table 23. <mod> Selection Table65Figure 8. T.30 HDLC Frame Format66Figure 9. CLASS 1 DTE-Generated HDLC Frame Information (AT+FTH=<mod>)66Figure 10. CLASS 1 DTE Reception of HDLC Frame Information (AT+FRH=<mod>)66Table 24. Fax Mode Command Descriptions67IS-101 Voice Mode AT Commands 6706.1 DTMF Detection Reporting716.2 Relay Control71Table 25. Voice Mode Command Descriptions71S-Registers 785Table 26. S-Register Command Descriptions85Caller ID 890Table 27. Caller ID Tags for Formatted Reporting90Parallel Host Interface 16C450/16C550A UART 9929.1 UART Emulation in the Controllerless Modem92Figure 11. UART Emulation in Intelsdb.VxD92Figure 12. FIFO Buffers for Transmitter and Receiver93Figure 13. Parallel Host Interface UART Register Bit Assignments949.2 UART Register Definitions959.2.1 Scratch Register (SCR)95Figure 14. Scratch Register (SCR)959.2.2 Modem Status Register (MSR)95Figure 15. Modem Status Register (MSR)959.2.3 Line Status Register (LSR)96Figure 16. Line Status Register (LSR)969.2.4 Modem Control Register (MCR)97Figure 17. Modem Control Register (MCR)979.2.5 Line Control Register (LCR)97Figure 18. Line Control Register (LCR)979.2.6 FIFO Control Register (FCR)98Figure 19. FIFO Control Register (FCR)989.2.7 Interrupt Identity Register (IIR)99Figure 20. Interrupt Identity Register (IIR)99Table 28. Interrupt Control Functions999.2.8 Interrupt Enable Register (IER)100Figure 21. Interrupt Enable Register (IER)1009.2.9 Transmitter Holding Register (THR)100Figure 22. Transmitter Holding Register (THR)1009.2.10 Receiver Buffer Register (RBR)101Figure 23. Receiver Buffer Register (RBR)1019.2.11 Divisor Latch Registers (DLM and DLL)101Figure 24. Divisor Latch Registers (DLM and DLL)101Table 29. Programmable Data Rates 1019.3 16C550A UART FIFO Operation1029.3.1 FIFO Interrupt Mode Operation1029.3.2 FIFO Polled Mode Operation102Size: 1.11 MBPages: 104Language: EnglishOpen manual