Extron electronic JMP 9600 manual Subnetting a Primer, Gateways, Local and Remote Devices

Set carriage return-line feed

Unless commanded otherwise, Telnet transmits a line feed character only (no carriage return) to the connected player when you press the <Enter> key. This is the correct setting for MSVPP communication with the player. 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 MSVPP link with the player does not function properly.

Close

To close the link to the player, 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 media player, access the Telnet prompt by typing the Escape character (<Ctrl>+<]>).

Subnetting — A Primer

It is not the purpose of this manual to describe TCP/IP protocol in detail. However, some understanding of TCP/IP subnetting (a netmask defines 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 media player and the mail server gateway. To understand subnetting at the level required to install and operate the media player, you must understand the concepts of a gateway, local and remote devices, IP addresses and octets, and netmask masks and octets.

Gateways

The media player can communicate with directly with other devices (if they are on the same subnet [netmask]) or the communication can be routed via a gateway (a device 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. The media player is the local device and the other unit 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) (figure 85). 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 85. Typical IP Address

JMP 9600 Media Player • Ethernet Connection 109