APPENDIX C. S REGISTERS
S14 * | Bit mapped option | ||
| Bit 0 | 0 | ATT (Default) |
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| 1 | ATP |
| Bit 1 | 0 | ATE0 |
| Bit 2 | 1 | ATE1 (Default) |
| 0 | ATQ0 (Default) | |
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| Bit 3 | 1 | ATQ1 |
| 0 | ATV0 | |
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| Bit 4,5,6 | 1 | ATV1 (Default) |
| 0 | AT&K0 | |
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| 3 | AT&K3 (Default) |
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| 4 | AT&K4 |
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| 5 | AT&K5 |
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| 6 | AT&K6 |
| Bit 7 | Originate/answer | |
|
| 0 | Answer |
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| 1 | Originate (Default) |
S15 | Reserved |
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|
S16 | Bit mapped test option | ||
| Bit 0 | Local analog loopback (AT&T1) | |
|
| 0 | Disabled |
|
| 1 | Enabled |
| Bit 1 | Not used | |
| Bit 2 | Local dig ital loopback (AT&T3) | |
|
| 0 | Disabled |
|
| 1 | Enabled |
| Bit 3 | Remote digital loopback status | |
|
| 0 | Loopback off |
|
| 1 | Loopback in progress |
| Bit 4 | Remote digital loopback (AT&T6) | |
|
| 0 | Disabled |
|
| 1 | Enabled |
| Bit 5 | Remote digital loopback with self test (AT&T7) | |
|
| 0 | Disabled |
|
| 1 | Enabled |
| Bit 6 | Local analog loopback with self test (AT&T8) | |
|
| 0 | Disabled |
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| 1 | Enabled |
| Bit 7 | Not used | |
S17 | Reserved |
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ACTIVE Professional External Modem User’s Manual | 28 |
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