HP Color LaserJet 4550 printer family - Software Technical Reference

Printing system software components
HP Color LaserJet 4550 Software Technical Reference 22
Device Pages
• Configure Printer - Lets you change any printer configuration setting
• Alerts - Lets you set up the printer to send problem and status alerts to anyone you
choose via e-mail (See detailed description below).
• Order Supplies - Lets you automatically order supplies over the web.
• Security - Lets you set up passwords to control who can remotely cancel jobs or
access the Device Pages.
• Language - Lets you select the language in which to display the embedded web
pages.
Networking Pages
• Provides the capability to display and control JetDirect card settings
Embedded Web Server (EWS) Printer Alerts
With Alerts enabled, the printer can send e-mail notices on problems or required
maintenance to specified individuals. Alert events range from toner low, to paper jams, to
fuser life low, to more serious problems such as a formatter failure.
The printer manager chooses what alerts to send, and who to send them to. More than
one individual can receive alerts, with each person receiving only the alerts they desire.
For example, an administrative assistant might be responsible for keeping toner loaded in
a printer, while an external service provider is responsible for major consumables. Alerts
could be set up so the administrator gets advanced warning on toner low situations, and
the external service provider gets alerts on fusers, OPCs, and ITBs.
Expanded EWS Functionality
Some of the EWS features require non-volatile RAM in order to allow users to set up and
retain specific information on a permanent basis. This applies to the Alerts feature and
the Printer Owner field. The user has the ability to save two e-mail addresses to which to
send alerts. Similarly, the user has a limited space in which to save the name, phone
number, etc., of the individual in charge of the printer.
In the N and DN bundles a flash DIMM can be added to provide additional non-volatile
memory in which to store information. The HDN bundle relies on the hard drive for non-
volatile storage. This allows users to enter more addresses to which to send alerts, and
also allows more detailed printer owner information.
Embedded Virtual Machine (EVM) for Java Applications
The CLJ 4550 is the first HP Laser Jet printer to include an embedded virtual machine for
Java applications. The Hewlett-Packard trade name for this functionality is "ChaiVM
virtual machine." The ChaiVM has two primary functions:
1. Internet "send and respond." The ChaiVM virtual machine is able to receive e-mails,
Java applications, and send results back to the originator. A typical use of this would
be to remotely run diagnostics.
NOTE: The EVM has no specific implementation in the Color LaserJet
4550 series printer.
2. Third party accessible architecture. The ChaiVM virtual machine offers a consistent
platform (or "virtual machine") on which to run applications. A Java ™ application that
can run on a ChaiVM virtual machine in a Win 98 PC can also run on a ChaiVM
virtual machine in a WIN NT PC, a MAC PC… or on a printer ChaiVM virtual