Extron Electronics MAV Plus Series User Guide - Manual (Page 160)

Quit
Exit the Telnet utility by typing quit and then pressing <Enter> at the Telnet prompt. If you
are connected to the CrossPoint or MAV Plus 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 the CrossPoint or MAV Plus switcher and the mail server gateway. To
understand subnetting at the level required to install and operate the CrossPoint or MAV
Plus switcher, you must understand the concepts of a gateway, analog and remote devices,
IP addresses and octets, and subnet masks and octets.
Gateways
The CrossPoint or MAV Plus switcher can communicate with the e-mail server that
the switcher uses for e-mail notification 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).
Analog and Remote Devices
The analog 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 and e-mail values in the matrix switcher (see
Email Settings Page on page 138).
When you are setting up the variables for e-mail notification, which may include subnetting,
the matrix switcher is the analog device and the e-mail 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 105). 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.
192.168.254.254 Typical IP Address:
Octets
Figure 105. Typical IP Address
CrossPoint and MAV Series Matrix Switchers • Ethernet Connection 154