DXP HD 4K PLUS Series • Reference Information
77
Setting 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;
however, if
crlf
is set, the SIS link with the switcher does not function properly.
Closing the link to the switcher
To close the link to the switcher, access the
Telnet
prompt by entering the escape
sequence (<Ctrl + ]
>
). At the
Telnet
prompt, enter
close
.
Help
For Telnet command definitions, enter
?
at the Telnet prompt.
Exiting Telnet (Quit command)
Exit the Telnet utility by entering
quit
at the Telnet prompt. If you are connected to the DXP
switcher, access the Telnet prompt by entering the Escape sequence (<Ctrl + ]>).
Subnetting, a Primer
A subnet is a
sub
set of a
net
work — a set of IP devices that have portions of their IP
addresses in common. It is not the purpose of this manual to describe TCP/IP protocol
in detail. However, some understanding of TCP/IP subnetting is necessary in order to
understand the interaction of the DXP switcher and the mail server gateway. To understand
subnetting at the level required to install and operate the DXP switcher, you must
understand the concepts of a gateway, local and remote devices, IP addresses and octets,
and subnet masks and octets.
Gateways
The DXP switcher can communicate with the e-mail server that it 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).
IP addresses and octets
Valid IP addresses consist of four 1-, 2-, or 3-digit numeric sub-fields, called “octets,” which
are separated by dots (see figure 51). Each octet can be numbered from 000 through 255.
Leading zeros, 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 51.
IP Address and Octets
