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CHAPTER 9: Data-Channel Configuration
Table 9-8. Asynchronous Channel Characteristics
Option | Default | Description | |
1. | Data Rate | 9600 | Sets the data rate (in bps) for the port. It is recommended that ports |
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| attached to a host port be set for a fixed speed. (ABR=autobaud rate |
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| detection. See explanation of ABR in text.) |
2. | Code Level | 8 | Sets the |
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| This includes the parity bit (see Table |
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| of the channel (both local and remote ports) must be the same and they |
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| must match the attached devices. Special considerations: |
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| • If flow control (option 10) is to be set for |
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| be 7, 8, or 9. |
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| • If you select a code level of 5 or 6, ABR (data rate) and |
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| (flow control) are not supported. |
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| • For code level 5, you must set the parity to none. |
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| • Do not configure the dedicated Command Port or Log Port on the NMS |
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| module for a code level of 5 or 6. |
3. | Parity | None | If code level is 9, then parity choices are even or odd. If the code level |
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| selected is 5, 6, 7, or 8, parity choices are space, mark, even, odd, or |
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| none. If you have a code level of 5, you must set the parity to none. |
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| Parity conversion is supported for all switched and |
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| ports (Phase 3.0 and above). Because of parity conversion, space, mark, |
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| even, and odd need not match on the local and remote end of the |
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| channel. The Multiserver has automatic parity conversion. Note that parity |
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| errors will be detected on channels configured for odd or even parity |
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| regardless of the code level. Those characters will be discarded. |
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| Channels with characters configured for mark, space or none will be |
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| forwarded, even if received in error. |
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| Parity conversion is not supported on force connected channels, feeder |
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| muxes, or phase 2.5 software. The parity parameters in these instances |
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| must be set to match. |
4. | Stop Bits | 1 | Selects the number of stop bits (1, 1.5, or 2) inserted at the end of a data |
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| character. To ascertain the correct stop bits to be selected, consult the |
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| user manual for the equipment to be connected to the port. |
5. | Echo | Off | Enables or disables the echo function. This is only valid if the port is |
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| connected to a terminal. |
6. | Channel End to | Terminal | Configures the port (channel) for a host or a terminal connection. Flow |
| Host/to Terminal |
| Control, Echo, and delays (LF, FF, and CR) are inoperable on ports |
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| configured as host. If a terminal port on one unit is connected to a terminal |
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| port on the other unit, then conversion of interface signal DTR to |
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| OFF does not occur on this channel. |
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