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Appendix A. Changing COM220 Settings
The COM220 can return several possible responses once
connected (each terminating in a carriage return):
CAUTION
“1” CONNECT
“5” CONNECT1200
“10” CONNECT2400
“13” CONNECT9600
“18” CONNECT4800
“20” CONNECT7200
“21” CONNECT12000
“25” CONNECT14400
Hence, to work with the COM220, the user must put in a
NULL string, else the DialModem will fail unless by chance
it returns the specific string the user entered. Therefore, it
is highly recommended to use the “” string for the connect
string, unless the user is using some other modem that he
knows has a different response string than those listed
above.
A.4.3 P97 Instruction (for CR10X)
Instruction 97 is a Program Control Instruction that makes the following types
of calls:
• Datalogger calls a computer to send data.
• Datalogger calls a voice phone using our voice-synthesized modem.
• Datalogger calls a remote datalogger to retrieve its input locations.
Instruction 97 has the following parameters:
• Parameter 1 - Modem/Baud-rate Codes
• Parameter 2 - Flag No. to Disable P97
• Parameter 3 - Call Time Limit (seconds)
• Parameter 4 - Seconds Before Fast Attempts
• Parameter 5 - Fast Attempts
• Parameter 6 - Minutes Before Slow Attempts
• Parameter 7 - Failure Location
• Parameter 8 - Callback ID
A-9