Extron electronic MPX 866 A Subnetting - A Primer, Gateways, Local and Remote Devices, Close

Set carriage return-line feed

Unless commanded otherwise, Telnet transmits a line feed character only (no carriage return) to the connected switcher when you press the <Enter> key. This is the correct setting

for SIS communication with the switcher. The Telnet set crlf command forces Telnet to transmit carriage return and line feed characters when <Enter> is pressed, but if crlf is set, the SIS link with the switcher does not function properly.

Close

To close the link to the switcher, access the Telnet prompt by typing the Escape character (<Ctrl>+<]>). At the Telnet prompt, type close, and then press <Enter>.

Help

For Telnet command definitions, at the Telnet prompt, type ? and then press <Enter>.

Quit

Exit the Telnet utility by typing quit and then pressing <Enter> at the Telnet prompt. If you are connected to the MPX 866 A matrix switcher, access the Telnet prompt by typing the Escape character (<Ctrl>+<]>).

Subnetting — A Primer

It is not the purpose of this guide to describe TCP/IP protocol in detail. However, some understanding of TCP/IP subnetting (a subnet is a subset of a network — a set of IP devices that have portions of their IP addresses in common) is necessary in order to understand the interaction of and another server gateway. To understand subnetting at the level required to install and operate the switcher, you must understand the concepts of a gateway, local and remote devices, IP addresses and octets, and subnet masks and octets.

Gateways

The MPX 866 A switcher can communicate with the a controlling computer directly (if they are on the same subnet) or the communication can be routed via a gateway (a computer that provides a link between different subnets).

Local and Remote Devices

The local and remote devices are defined from the point of view of the function being described. In this guide, subnetting is an issue when you are using the controlling PC to set TCP/IP values in the switcher (see “IP Settings/Options window“ in the Matrix Software section). When you are setting up the variables that may include subnetting, the matrix switcher is the local device and the remote server is the remote device.

IP Addresses and Octets

Valid IP addresses consist of four 1-, 2-, or 3-digit numeric subfields, properly called “octets,” separated by dots (periods) (see figure 73). Each octet can be numbered from 000 through

255.Leading zeroes, up to three digits total per octet, are optional. Values of 256 and above are invalid.

Typical IP Address: 192.168.254.254

Octets

Figure 73. Typical IP Address

MPX 866 A Media Presentation Matrix Switcher • Ethernet Connection 118