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Modem/ISDN port
The AdderView CATx 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 configuration.
IMPORTANT: When the AdderView
CATx IP is accessible from the public
Internet or dial up connection, you
must ensure that sufficient 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 AdderView CATx 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 COM2 at the
rear of the AdderView CATx 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 ‘ATZS0=1’.
Both the serial port speed and startup string settings can easily be altered during
configuration - see Initial IP configuration for more details. The other serial
settings are fixed at: No parity, 8 bit word and 1 stop bit.
Cable from modem
or ISDN adapter
AdderView CATx
rear panel