Compaq P5000 Series Data Terminal Ready, Request to Send, Buffer Size in K, Host Interface

Chapter 4 HOST INTERFACE

Data Terminal Ready

This configuration is part of hardware flow control and determines when the Data Terminal Ready (DTR) signal is generated. This signal indicates whether or not the printer is ready to receive data.

•True. Continuously asserts the DTR signal (the default).

•On-Line and BNF (buffer not full). Asserts the DTR signal when the printer is online and the internal serial buffer is not full.

•Off-Line or BF (buffer full). Asserts the DTR signal when the printer is offline or the internal serial buffer is full.

•False. Never asserts the DTR signal.

Request to Send

This configuration is part of hardware flow control and determines when the Request to Send (RTS) signal is generated. This signal indicates whether or not the printer is ready to receive data.

•True. Continuously asserts the RTS signal (the default).

•On-Line and BNF. Asserts the RTS signal when the printer is online and the internal serial buffer is not full.

•Off-Line or BF. Asserts the RTS signal when the printer is offline or the internal serial buffer is full.

•False. Never asserts the RTS signal.

Buffer Size in K

Configures the amount of memory allocated for the serial port buffer. The default is 8 Kbytes, but you may specify between 1 and 16 Kbytes, in 1-Kbyte increments.

NOTE: If you select a baud rate that is 19200 or greater, you may need to increase the Buffer Size in K parameter from the default to 16 Kbytes to improve performance.

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