Switches S1-4 and S1-5: Asynchronous/Sync Operation
Use Switches
Setting | ||
Off | Off | Async/Sync |
On | Off | Reserved |
Off | On | Reserved |
On | On | Reserved |
Switches S1-6 and S1-7: System Clock Mode
Use Switches
Clock Mode | Description | ||
On | On | Internal | System clock |
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| generated internally |
Off | On | External (DTE) | System clock derived |
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| from terminal interface |
On | Off | Receive Recover | System clock derived |
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| from the received line |
Off | Off | Hardware Reset | signal. |
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Important: A pair of Model 1092s communicate synchronously across the twisted pair line connection. Therefore, you must set these switches whether your application is async or sync. For X.21 or Async applications, please configure one Model 1092 for internal clock mode and the other Model 1092 for receive recover clock mode.
Switch S1-8: Response to RDL Request
Use Switch
Setting | |
On | Response to RDL Request Enabled |
Off | Response to RDL Request Disabled |
3.1.2 Configuration Switch Set “S2”
Use the eight DIP Switches in Switch S2 to enable 19.2 kbps synchronous operation, set the loopback modes and the speed of the control port. The following table summarizes default positions of DIP Switch S2. Detailed descriptions of each switch follow the table.
S2 SUMMARY TABLE
| Position | Function | Factory Default | |||
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| 19.2 kbps Enable | Off |
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| Not Assigned | Off |
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| Response to LAL from DTE | Off |
| Disabled | ||
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| Not Assigned | Off |
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| Not Assigned | Off |
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| Response to RDL from DTE | On |
| Enabled | ||
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| Control Port Data Rate | On | } | 9600 bpsc | ||
| Control Port Data Rate | On | ||||
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Switches S2-1: 19.2 kbps Synchronous Rate Enable
Use Switch
Activation | Description | |
Off | Disabled | Synchronous data rate is 32 - 128 |
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| kbps as defined by switches |
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| and |
On | Enabled | Model 1092 operates at |
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| synchronous 19.2 kbps data rate* |
*NOTE: To operate at 19.2 kbps, Set Switches
Switch
7 | 8 |