Communication and Control, cont’d
A/V Device Control
Control of A/V devices may be accomplished in any of several ways once the IPL T interface has been connected and configured. These include Web pages, Telnet, and direct port access.
Custom Web pages
These pages can either be modified versions of the existing Web pages, or new Web pages developed in the field.
Web page development can be done with a Web site development tool such as Frontpage or Dreamweaver. Custom Web pages are loadable with the Web server File Manager (see Managing files earlier in this chapter).
Telnet (Port 23)
Telnet, short for Telecommunications Network, provides a way for you to connect to a computer or server (in this case the IPL T interface) on a network. Once connected via Telnet, you can send ASCII serial commands (see the Command/response table earlier in this chapter) to control devices connected to the interface through both serial ports. Telnet only works in
Accessing and using Telnet
1.Click Start, then Run, then type in “Telnet” and click OK. The Telnet program will start (see figure
2.At the command prompt, type “open” and press Enter.
3.At the < to > prompt, type the IP address of the IPL T unit. (The default IP address is 192.168.254.254, but it may have been changed in the setup or configuration process. If it was changed, use the new address.) Telnet will default to port 23.
Figure 4-32 — Telnet command prompt
4.If passwords were set up for the connected system, you will be prompted to log in as Administrator or User. Otherwise the system will respond with a <cr/lf>.
Figure 4-33 — Connecting to the IP address
5.Once you are connected, you can enter serial (ASCII) commands as desired.
6.When you are through entering commands to the interface, type “quit” at the command prompt to quit Telnet.
Direct port access (ports 2001 through 2002)
Direct access allows a direct,
COM1: direct access port #2001
COM2: direct access port #2002
When a TCP session is initiated to port 2001 through port 2002, all data sent and received will pass directly to and from that port without any processing. Serial port parameters should be set via a Telnet connection prior to using direct access.
Using direct access
1.Access the unit via Telnet and configure the COM port parameters as desired using serial commands (see the Command/response table earlier in this chapter).
2.Close the initial Telnet session.
3.Open a direct access Telnet session to the selected port by entering the IP address followed by a space then the port number (e.g., 192.168.244.244 2001).
IPL T SF24 and IPL T SFI244 • Communication and Control |