Western Telematic APS-16 - Manual (Page 18)

4.5. Application Example
The example in Figure 4.2 shows one of many possible installation configurations for the APS.
In this example, APS-16 ports have been configured as follows:
· Port 1 (System SetUp Port): This port has been left open in order to permit on-site
service personnel to access the Command Mode without disrupting other ports. Since
Port 1 is a System SetUp Port, the service tech is allowed password protected access to
Supervisor Level commands, and is able to connect to any port, change configuration, or
display unit status.
· Port 2 (Modem Port): An external modem has been installed at Port 2. This port has also
been configured for Modem Mode, which allows definition of a modem reset string,
initialization string, and hang-up string. When a caller contacts the APS unit via modem, a
password prompt will be displayed. If the Supervisor Password is entered, the APS will
permit access to Supervisor Level Commands; if a Port password is entered, the APS will
only recognize User Level Commands. Supervisors are allowed to adjust port
configuration, connect to any port, or review unit status. Users are only allowed to review
status and connect to the ports allowed by their Port Password.
· Ports 5, 7, and 9 (User Ports): The Port Password “COLOCATION1” has been assigned
to these three ports. If the APS is contacted via the Modem Port, and this password is
entered at log in, User’s will only be able to review status of permitted ports and connect
to the devices attached to Ports 5, 7, and 9.
· Ports 12, 14, and 16 (User Ports): The Port Password “COLOCATION2” has been
assigned to these three ports. If the APS is contacted via the Modem Port, and this
password is entered at log in, User’s will only be able to review status of permitted ports
and connect to the devices attached to Ports 12, 14, and 16.
Note that in this example, Ports 3 through 16 could also be a mixture of ports connected to
external modems, and ports connected to devices such as file servers or archives. This would
allow remote users to dial in and access a specific file server or archive after entering a valid
Port Password at log in.
4-5
APS Series - Asynchronous Port Switches, User's Guide Hardware Installation
Figure 4.2: APS Application Example (Model APS-16 Shown)