Establishing A Connection; Connection Timeouts; Number Of Connections - Extron electronics DTP CrossPoint 4K Series User Manual

Establishing a connection

Establish a network connection to a DTP CrossPoint switcher as follows:
1. Open a TCP socket to port 23 using the IP address of the switcher.
NOTE: If the local system administrators have not changed the value, the
factory-specified default, 192.168.254.254, is the correct value for this field.
The switcher responds with a copyright message including the the name of the product,
firmware version, part number, and the current date and time.
NOTES:
• If the switcher is not password-protected, the device is ready to accept SIS
commands immediately after it sends the copyright message.
• If the switcher is password-protected, a
copyright message.
2. If the switcher is password protected, enter the appropriate administrator or user
password.
If the password is accepted, the switcher responds with Login User or Login
Administrator.
If the password is not accepted, the

Connection timeouts

The Ethernet link times out after a designated period of time of no communications. By
default, this timeout value is set to five minutes but the value can be changed (see the
Configure port timeout SIS command on page 83).
NOTE: Extron recommends leaving the default timeout at 5 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

A DTP CrossPoint switcher can have up to 200 simultaneous TCP connections, including all
HTTP sockets and Telnet connections. When the connection limit is reached, the switcher
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
device, the number of connections should stay low and unnecessary open sockets should
be closed.
Using verbose mode
Telnet connections to a DTP CrossPoint switcher can be used to monitor for changes that
occur on the switcher, 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 switcher,
the Telnet session must be in verbose mode 1 or 3 (see the
on page 83).
DTP CrossPoint 4K Series Matrix Switchers • Programming Guide
prompt appears below the
Password:
prompt reappears.
Password:
Verbose Mode SIS command
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