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6.9.1 Modem (RS-232 KEY RM)
The RS-232 key with modem connects the entire RS-485 network of Class 320 meters
to a telephone line.
** Refer to Section 6.7 for RS-485 network connections.
On the back panel of the RS-232 key/modem, the left jack (RS232) is not used in most
cases since there is no local host computer.
The two jacks at the top center of the rear panel on the RS-232 key/modem are for
connecting the phone line. Connect either one of these two jacks to the telephone line.
IMPORTANT:
The telephone line should be dedicated exclusively to the automatic meter
reading system. Never connect to a telephone line used by other modems or
fax machines. If there are telephones connected to this phone line, the propri-
etor must be aware that all phones must be on "hook" in order for the modem
to work. A dedicated phone line is suggested for system reliability.
27
CLASS 320 METER
62-0397-02
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