### Transmission Errors

If transmission errors occur, attempt the following to determine the cause of the problem:

1. Reduce the baud rate.

2. Reduce the cable length.

3. Use a cable with a lower capacitance per foot rating.

In situations where low-capacitance cable is unavailable, or very long cable runs are required, "short-haul" modems, available from suppliers such as Black Box, can be used to increase the effective range of the EIA-232 interface. Short-haul modems are similar to standard modems, except that they are connected directly to each other via a cable instead of going through a telephone circuit.

Note: Use only externally-powered short-haul modems with Digi products.

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