Extron electronic Understanding Unsafe Characters and Using Telnet for the IPL T PC1 Network Card

Unsafe characters

URLs use some characters for “special use” in defining their syntax and these characters should be encoded. For various reasons, these characters may possibly be misunderstood within a URL.

The following table lists unsafe characters.

Character		Hexadecimal	Decimal
	Space	20	32
“ ”	Quotation marks	22	34
<	“Less than” symbol	3C	60
>	“Greater than” symbol	3E	62
#	Pound	23	35
%	Percent	25	37
{	Left brace	7B	123
}	Right brace	7D	125
	Vertical bar or pipe	7C	124
\	Back slash	5C	92
^	Caret	5E	94
~	Tilde	7E	126
[	Left bracket	5B	91
]	Right bracket	5D	93
`	Grave accent	60	96

Accessing and Using Telnet (Port 23)

Telnet, short for Telecommunications Network, provides a way for you to connect to a computer or server (in this case, the PC1 interface) on a network. Once connected via Telnet, you can send ASCII serial commands (see the Command and Response Table for SIS Commands in the “SIS Programming and Control” section to configure and monitor the PC1 settings).

1.From your desktop Start menu, select Run, then enter Telnet, then click OK. The Telnet program starts (see the figure below).

Figure 38. Telnet Command Prompt

2.At the command prompt, enter open.

IPL T PC1 • HTML Configuration and Control 43