WaveWare RCD-1 - Manual (Page 7)

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5. Serial Data Output
The RCD-1 provides an RS-232 type serial output interface. When configured for serial data output, all
messages that are received by the RCD-1 are sent out the RS-232 serial data interface in the ASCII format.
For a message to be properly received, it must be sent to an address that matches one of the addresses
programmed into the RCD-1. Output control commands can be associated with addresses, allowing
automatic output control upon reception of a new message for a particular address. See the Annunciation
Section of this manual for details.
Some paging carriers insert dashes into messages sent to numeric pagers. If this is a problem, contact your
carrier and request that dashes not be inserted, or tell them to send the messages in alphanumeric format.
The RCD-1 RS-232 port is a 3-wire interface, and thus does not use hardware flow control.
The serial port output baud and parity are programmable using the optional programming kit.
An up to 30 character message Header and Trailer may be programmed into the RCD-1, entered as HEX
values, for each address. If a pre-programmed header and/or trailer are configured, these will be
concatenated with every data message the RCD-1 sends to the serial port. If the pre-programmed header is
configured, the character(s) configured will always be transmitted out the serial port immediately before the
received message. If the pre-programmed trailer is configured, the character(s) will be sent out immediately
after the received message.
In addition to headers and footers, there is a Timeout field associated with each address. If the Timeout
field is configured for a given address, and the Msg Time Out Delay value is greater than 0 seconds, the
Timeout field value will be output on the RCD-1 serial port when the Msg Time Out Delay time is elapsed
after a new message is received for that address. The Msg Time Out Delay time value can range from 0 to
65,000 seconds (approximately 18 hours).
The Carriage Return insertion or Line Feed insertion feature may be enabled or disabled during
programming to allow the serial output to work properly with a variety of printers. The Insert CR After
Detected LF option will cause a Carriage Return to be inserted before any detected Line Feed character in
the message. Similarly, the Insert LF After Detected CR option will cause a Line Feed to be inserted after
any Carriage Return in the message.
If the data rate of the RS-232 serial port is slower than the rate at which messages are sent to the RCD-1 it
will buffer the messages as it receives them. The buffer in the RCD-1 is 2,000 characters deep. If the
buffer fills, the next message received will overwrite the buffer. If the baud rate of the serial port is equal to
or greater than the over-the-air POCSAG rate, the buffer will never overflow, and the message length is
limited only by the accuracy of the transmit and receive baud rates. Message lengths of 512 characters or
less are recommended.