User`s guide
Note:
Mask #5 has priority over the other four masks. If Mask #5 is set to deny access by
"255.255.255.255" (all wild cards), all IP Addresses will be blocked, and you will not be able to
access the NPS Command Mode via network. Access will only be allowed via the Console Port or
Modem Port.
●
When using the wild card address "255.255.255.255" to block access by all IP Addresses, make
certain that at least one higher priority mask permits access by your IP address.
●
5. Operation
Your PC or Control Device must send ASCII characters at the same data rate as the NPS. The unit accepts 8 bits no parity,
or 7 bits even or odd parity, but will always answer back at 8 bits, no parity.
5.1. Access the NPS Command Mode
In order to invoke commands, the user must first access the NPS Command Mode. Commands can be sent to the NPS via
Network or modem, or from a local PC connected directly to the Console Port. To access the Command Mode, proceed as
follows:
Contact the NPS:
Via Network: Telnet to the NPS unit's IP Address. For example, assuming the IP Address is "192.1.1.1",
on a UNIX system the Telnet command would be invoked as follows:
$ telnet 192.1.1.1 [Enter]
Note:
If the Telnet connection to the NPS is refused, this probably means that the unit is busy, or
that the IP Security feature has denied the connection.
.
Via Modem: Start your communications program (e.g. ProComm or Hyper Terminal). Dial the external
modem that is connected to the NPS. Wait for the Connect Message.
b.
Via Console Port: Start your communications program (e.g. ProComm or Hyper Terminal) and press
[Enter]. Make certain you are communicating via the COM port connected to the NPS.
c.
1.
Password: If the System password has been defined, a prompt will be displayed. Key in your System or User
Password, and press [Enter].
2.
Disconnect: To end the session, type /X and press [Enter] (or disconnect using Telnet software).3.
5.2. Displaying Plug Status
The Status Screens display the On/Off state and user defined parameters for the switched plugs. To display the Status
Screen, type /S and press [Enter]. There are two NPS Status Screens; the System Status Screen, and the User Status
Screen.
The System Status Screen (Figure 9), lists On/Off status and parameters for all eight plugs. Communication settings,
modem commands, network parameters and other functions are also listed.
NPS Series Network Power Switch -- User's Guide
file:///C|/WEBPAGE/guides/nps/NPSGUIDE.HTM (14 of 20) [12/1/1999 3:00:04 PM]