User Guide User guide

Establishing a Connection

Establish a network connection to the processor as follows:

1. Open a TCP socket to port 23 using the processor’s IP address.

NOTE: If the local system administrators have not changed the value, the factory-

specied default, 192.168.254.254, is the correct value for this eld.

The processor responds with a copyright message including the date, the name of the

product, ﬁrmware version, part number, and the current date/time.

NOTE: • If the processor is not password-protected, the device is ready to accept SIS

commands immediately after it sends the copyright message.

• If the processor is password-protected, a password prompt appears below

the copyright message.

2. If the processor is password protected, enter the appropriate administrator or user

password.

• If the password is accepted, the processor responds with Login User or

• If the password is not accepted, the Password prompt reappears

Connection Time-outs

The Ethernet link times out after a designated period of time of no communications. By

default, this time-out value is set to ﬁve minutes but the value can be changed.

NOTE: Extron recommends leaving the default time-out at ve minutes and

periodically issuing the Query (Q) command to keep the connection active. If

there are long idle periods, Extron recommends disconnecting the socket and

reopening the connection when another command must be sent.

Number of Connections

The Annotator can have up to 200 simultaneous TCP connections, including all HTTP

sockets and Telnet connections. When the connection limit is reached, the processor

accepts no new connections until some have been closed. No error message or indication

is given that the connection limit has been reached. To maximize performance of an IP Link

device, the number of connections should stay low and unnecessary open sockets should

be closed.

Using Verbose Mode

Telnet connections to the processor can be used to monitor for changes that occur on the

processor, such as front panel operations and SIS commands from other Telnet sockets or

a serial port. For a Telnet session to receive change notices from the processor, the Telnet

session must be in verbose mode 1 or 3. In verbose mode 1 or 3, the Telnet socket reports

changes in messages that resemble SIS command responses.

Host-to-Processor Instructions

SIS commands consist of one or more characters per command eld. They do not require

any special characters to begin or end the command character sequence. Each processor

response to an SIS command ends with a carriage return and a line feed (CR/LF = ]),

which signals the end of the response character string. A string is one or more characters.

Annotator • SIS Communication and Control 38