Communications

RTconn-Global

	Does RS-232 and RS-485.

	GBP 345 each.  die-cast enclosure 180mmm x 80mm x 60mm

	cheaper version @ 200metres (GBP 320.00)
	 plastic box: 150mm x 80mm x 40mm
 
	Frequencies:
	
		458.50-458.775 (11 channels)
		433.075-434.875 (64 channels)

RTcomm-IQ-Radio

	GBP 100.00 for RS-232
	RS-232 9-pin D-connector.  board is 30mm x 60mm x 30cm!

	Frequency:

		433.920 Mhz (57k-baud) fixed frequency.