With IPHost Network Monitor you can run simple snmp requests against a HP device in your network.
model-number
model-number
1.3.6.1.4.1.11.2.3.9.4.2.1.1.3.1
Identifies the device model number as listed in the HP corporate price list (e.g. C2121A for DeskJet 500C). The string is as specific as possible. Products should note in POS if the model number on the CPL changes but the device reports the previous model number. If the model number changes based on the installed options, the POS should indicate if only the base model number is returned, or if the device senses the installed options and returns the correct model number. If possible, encode the model number in a symbol set (like Roman-8) that matches the ASCII character set and limit the characters used to ASCII characters. Additional information: The value of this object does not change based on the installed options. The default of this object is the same on all MoBY printers.
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IPHost Network monitor allows you to monitor model-number on Hewlett Packard device via the SNMP protocol. Download IPHost Network Monitor (500 monitors for 30 days, 50 monitors free forever) to start monitoring Cisco switches right now.