6.2.2 Sync Data Port Configuration
The Sync Data Port Configuration menu allows you to configure the data port for either asynchronous or synchronous operation, depending on the type of device connected to the port.
When the port is configured for synchronous operation, the following Data Port Configuration menu displays the default parameters:
Data Port Configuration |
| ||
1 | - | Async/Sync: | Sync |
2 | - | Speed: | 57600 |
3 | - | Idle Condition: | Flags |
4 | - | NRZ/NRZI Encoding: | NRZ |
5 | - | CRC Preset: | All 1s |
6 | - | Off | |
S - | Store All Configurations |
| |
M - | Main Menu |
| |
P - | Previous Menu |
| |
Selection : _
The Async/Sync option configures the port for either asynchronous or synchronous operation. When a synchronous device such as a LAN bridge or router is connected to the port, the data port needs to be configured for synchronous operation.
The Speed option needs to be set to match the speed of the sync device. When the data port is connected to a synchronous device, the baud rate is from 300 bps up to 128K bps. The default channel speed is 56K bps.
The Idle Condition option must be set to match the idle condition of the synchronous device connected to the data port. The idle condition determines what happens when the synchronous data line is idle (i.e., no data frames are being transmitted). The default condition is to continuously send SDLC flags (Flags). The other idle condition is the mark state (Mark). The transmit LED will be off during idle time if the synchronous device is in the mark state during idle conditions.
The NRZ/NRZI Encoding option refers to the fact that synchronous data can be encoded by using either the NRZ
75