I-Tech Company CMS 6R4 Series manual Port Buffers

CMS-6R4 Series - User’s Guide

To clear data from any port buffer (with or without reading it first), access command mode via the text interface, using an account and port that permit Supervisor commands, then issue the /E (Erase Buffer) command using the following format:

/E n [Enter]

Where n is the number of the port buffer to be cleared.

Note: The /E command cannot erase data from a port buffer that is currently being read by another port.

6.3.3.2. Port Buffers

The Status Screen lists the amount of Buffer Memory currently used by each port. The CMS-6R4 uses buffer memory in two different ways, depending on the user-selected port mode.

•Any-to-Any, Passive, and Modem Mode Ports: When two ports are communicating at dissimilar baud rates, the buffer memory prevents data overflow at the slower port.

•Buffer Mode Ports: Stores data received from connected devices. The user issues a Read Buffer command (/R) from an Any-to-Any or Modem Mode port to retrieve data.

If the Status Screen indicates an accumulation of data, the /E (Erase Buffer) command can be invoked to clear the buffer.

Note: When a Buffer Mode port is reconfigured as an Any-to-Any, Passive, or Modem Mode port, any data stored in the buffer prior to changing the port mode will be lost.

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