Once an FTP session is opened, it remains active until either
the client closes the connection or the data and control
connections are idle for a time that exceeds the idle timeout
period (default is 270 seconds). The idle timeout can be set
through various TCP/IP configuration tools, such as
BOOTP/TFTP, Telnet, printer's control panel (see
TCP/IP
Configuration
), the embedded web server (see
Using the
Embedded Web Server
), or management software.
Control Connection
Using standard FTP, a control connection is opened by the
client to the FTP server on the HP Jetdirect print server. FTP
control connections are used to exchange commands between
the client and the FTP server. The HP Jetdirect print server
supports up to four control connections (or FTP sessions)
simultaneously. If the number of allowed connections is
exceeded, a message indicating that service is not available will
be displayed.
FTP control connections use TCP port 21.
Data Connection
A second connection, a data connection, is created each time a
file is transferred between the client and the FTP server. The
client controls the creation of a data connection by issuing the
commands that require a data connection (such as FTP
ls
,
dir
or
put
commands).
Although the
ls
and
dir
commands are always accepted, the
HP Jetdirect FTP server supports a single data connection for
printing at a time.
The transmission mode for an FTP data connection with the
HP Jetdirect print server is always in stream mode, which
marks the end-of-file by closing the data connection.
Once a data connection is established, the file transfer type
(ASCII or binary) can be specified. Clients may attempt to
autonegotiate a transfer type, and the default transfer type
depends on the client system (for example, Windows NT may
default to ASCII, while UNIX may default to binary). To
specify the transfer type, enter the
bin
or
ascii
command at
the FTP prompt.
FTP Login
To start an FTP session, enter the following command from a
MS-DOS or UNIX command prompt:
ftp <IP address>
where
<IP address>
is the valid IP address or node name
configured for the HP Jetdirect print server. See
FTP Login
Example
Summary of Contents for jetdirect 250m
Page 12: ...Section 1 Networks Click the button to continue ...
Page 21: ...Section 2 Network Printing Click the button to continue ...
Page 28: ...Section 3 Installing a Network Printer Click the button to continue ...
Page 37: ...End of Network Basics tutorial ...
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Page 194: ...Does the control panel display on your printer show an error message ...
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Page 218: ......
Page 278: ...Australia This equipment complies with Australian EMC requirements Canada ...
Page 280: ......