Campbell Scientific COM210 Telephone Modem - Manual (Page 11)

COM210 Telephone Modem
7
To comply with FCC rules and regulations, all repairs on the COM210 modem
must be performed by Campbell Scientific, Inc. or an authorized agent of
Campbell Scientific, Inc. For assistance in installation, troubleshooting, or for
repair, contact Campbell Scientific:
Campbell Scientific, Inc.
815 West 1800 North
Logan, Utah 84321-1784
Telephone: (435) 753-2342
Fax: (435) 750-9540
Web site: www.campbellsci.com
5. Modem Settings in Non-Volatile Memory
The COM210 comes from the factory with the appropriate settings for most
applications. It is programmed to answer the call as soon as it detects the call.
One may modify the COM210’s settings in non-volatile memory using Hayes
AT commands. Appendix A describes the procedures and commands required
to make the changes described in this section.
Some of the settings one may change are:
Disable auto-answer: This option is used only when the modem is not to
answer a call. For example, the COM210 is connected to a telephone line that
is to be used part time for voice communication. In this situation it is best to
have the datalogger call the computer.
Speaker On/Off and Volume: Default settings have the speaker on during
call establishment only and set to a low volume. To conserve on current drain
during the connection time or so one doesn’t hear the speaker, one may turn
the speaker completely off. When one wants to hear the speaker better than
the default low volume setting, one may change it to a higher volume level.
Answer on X th ring: This option is used when the modem is sharing a line
and you only want it to answer after a specified number of rings. For example,
the COM210 is sharing a line with people at an office. It can be programmed
to only answer after the third ring. If the PC calls when the office is closed and
no one answers the phone after three rings, the datalogger will pick it up.
Change telephone system types: Change from the Bell 212A (U.S. and
Canada) system to a CCITT V.32 (foreign, 9600 baud) or CCITT V.22
(foreign, 1200 baud) system. This does not mean that the COM210 is tested
and approved for all foreign countries.
CCITT is an international consultative committee that sets international
communications usage standards. V.32 and V.22 are standards that the
COM210 meets.
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