User guide

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13
Modem/ISDN port
The MC5-IP models provide a serial
port to allow you to connect either
a modem or ISDN terminal adapter.
This can be used as a primary,
secondary or backup access port
for global users, as best suits your
overall conguration.
IMPORTANT: When the MC5-IP is
accessible from the public Internet or
dial up connection, you must ensure
that sufcient security measures
are employed.
Note: On non-IP models, the
COM2/MODEM port is reserved for
the support of future features.
To connect a modem or ISDN adapter
1 If possible, disconnect power from the MC5-IP and the modem or ISDN
adapter.
2 Connect a suitable serial modem (non-crossover) cable to the serial port on
the modem/ISDN adapter.
3 Connect the other end of the serial cable to the port labelled COM1 at the
rear of the MC5-IP.
Note: The default serial port speed is 115200 and a standard Hayes-compatible
auto-answer string is sent during startup. The default startup string is
‘ATZHS0=1’. Both the serial port speed and startup string settings can easily be
altered during conguration - see Initial IP conguration for more details. The
other serial settings are xed at: No parity, 8 bit word and 1 stop bit.
Cable from modem
or ISDN adapter
MC5 rear panel
POWER
SWITCH
COMPUTER
SYSTEM
CAM
LOCAL
USER
REMOTE
USER
U S
MODEM
/ISDN
POWER
IN
GLOBAL
USER
IP