Reference Guide for the Model XM128 ISDN Digital Modem
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Command | Bit | Decimal | Hexadecimal | Function and | Default or | |
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S20= |
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| DTE speed (bps) | +003 | |
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| from AT command |
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| 0 | 0 | 230400 bps |
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| 1 | 1 | 115200 bps |
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| 3 | 3 | 57600 bps |
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| 4 | 4 | 38400 bps |
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| 5 | 5 | 19200 bps |
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| 9 | 9 | 9600 bps |
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| 11 | B | 4800 bps |
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| 12 | C | 2400 bps |
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| 13 | D | 1200 bps |
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| 14 | E | 460800 bps |
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| 15 | F | 921600 bps |
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S21= |
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| Bitmapped register |
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| 0 | 0 | Speaker is always off. | M0 | ||
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| 2 | 2 | Speaker is on until carrier is | M1 | |
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| 4 | 4 | Speaker is always on. | M2 | |
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| 3 | 0 | 0 | DSR is always on. | &S0 | |
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| 8 | 8 | According to CCITT. See also | &S1 | |
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| 4 | 0 | 0 | CD is always on. | &C0 | |
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| 16 | 10 | CD tracks presence of data carrier. | &C1 | |
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| See also |
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Status Registers and Result Codes |