Campbell Scientific COM310 Voice Communications Modem - Manual (Page 41)

D-1
Appendix D. Set Rings, AT Parameters
D.1 Set Number of COM310 Rings before Answer
To program the number of rings before the COM310 answers, use the
datalogger’s *D3 setting. Changing the COM310’s ATS0 setting (as with the
COM210) will not change the number of rings before answer.
*D3 setup for the CR10X, CR23X, or CR510:
(1) Key in *D3A
(2) Key in 1, 2, or 3 according to desired number of rings
(3) Press A
(4) Key in *0 to compile
D.2 Telephone Connection to COM310
Changing the COM310's AT settings may result in
communication problems or loss of communications
requiring retrieval of COM310 from remote site and return
to factory for non-warranty work. We recommend that you
test a setting change locally before changing it remotely.
Also, there is the slight risk of phone line noise causing
erroneous setting changes to occur.
The following describes how to view and change AT parameters of the
COM310’s Connexant chipset via telephone. See above CAUTION.
The following assumes that your PC has an internal or external modem
connected.
(1) Step 1
Run HyperTerminal
®
or similar terminal program
(2) Step 2
(a) Click on File \ New Connection
(b) In the Connection Description window type a name such as
“COM310_94.” Click on “OK.”
(c) Select a configured modem in “Connect Using”
Enter COM310’s phone number followed by “,,,,,9,4”.
Example: 750-1234,,,,,9,4 Click on “OK.”
(d) Click on Modify\Configure\General Tab and select Maximum Speed
of 9600.
(e) Press “OK”
CAUTION