88
Table 13-7 Necessary components for remote monitoring
Names of components
Hub for 10BASE-T
10BASE-T LAN straight cable
(twist pair cable)
Dialup router
Data/Fax modem card
Remarks
Refer to Table 13-4.
This component is necessary, when the number of G-50A and that of a PC to be connected is over the
number of dialup-router-built-in hub ports and when wiring distance is expanded.
Refer to Table 13-4.
ISDN line is available.
In case of using analog line and PHS line, connect a PC card shown below to dialup router.
This is necessary in case of using analog line.
Table 13-8 List of corresponding lines
Line at site
Analog line
1
ISDN line
PHS line
Analog line
2
Line in remote location
ISDN line
PHS
13.3 Setting for Remote Monitoring
The use of a modem and dial-up router allows monitoring and control from remote locations. The
components shown in Table 13-7 are necessary for remote monitoring.
In addition, when using the dial-up router shown in Table 13-7, the lines available for connection from
remote locations are assigned according to the telephone circuit class in the area where G-50A is installed.
Select the line suitable for the remote place, referring to Table 13-8.
It is possible to monitor the operational status of air-conditioners
in branch to control them from remote locations.
Remote
location
head office
branch
PC with modem
Public phone circuit
Dialup
router
G-50A
PC for centralized control
Local
site
Figure 13-4 Remote monitoring system
Notice
●
Since the transmission speed of analog line is slow, the use of ISDN line or PHS line is
recommended.
●
ADSL system is of analog originally. In ADSL system, however, data are transmitted,
separated for data communications and for telephone communications by the use of a
device called splitter to separate data side from telephone side.
An ADSL modem is connected to the data side of ADSL. But telephone from outside is
not connected with the modem, because dialup connection is not possible with the
modem.
Connection to telephone from outside in ADSL system is now under consideration.
1
In order to use analog line, fit up the router with a modem. (Refer to Table 13-7 for recommended modem card)
2
In order to accept data to arrive on analog line in remote locations on ISDN line at site, fit up the router with a modem card. (Refer to Table 13-
7 for recommended modem card)
Summary of Contents for Central Controller G-50A
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