Interfacing to a Host Computer
When discovered, the default name that will appear will be “MLP 3040-aaannnnn” where “aaannnnn” is the printer’s serial number. To obtain the printer’s Bluetooth name, you may use the printer’s Setup menus or you may have the printer print it out. To print all the configuration for the interface, press and hold the 
Enter Button until “Printing Setup” is displayed.
Whenever a host device has established a connection to the printer, the 
Wireless Indicator will be lit. When the host closes the connection, the indicator will turn off. To conserve battery power, application programs should disconnect from the printer whenever possible.
Wi-Fi®Interface
In addition to the standard RS-232C Serial interface, your MLP 3040 may be equipped with an optional Wi-Fi interface. Wi-Fi interfaces are built into some PDA’s and may be added to most others. Wi-Fi interfaces may also be added to notebook or desktop computers and as an “access point” to a wired network. To communicate using the Wi-Fi interface, “Wi-Fi” must be selected in the Interface Menu as described on page 26.
The Wi-Fi interface uses wireless, radio frequency signals to communicate, which eliminates the line-of-sight requirement imposed by the optional IrDA interface.
The MLP 3040 Wi-Fi interface acts as a server and will accept connections from a host device such as a PDA, notebook computer, or a network server.
The MLP 3040 Wi-Fi interface conforms to the IEEE 802.11b standard. The factory default settings for this interface are:
WLAN Type: Infrastructure
WLAN SSID: any WLAN WEP Bits: 0 (Off)
WLAN Auth: Auto
IP Address Assign: DHCP (The DHCP name will be “MLP 3040-aaannnnn” where “aaannnnn” is the printer’s serial number.)
Port: 8023
These settings for the Wi-Fi interface features may be modified using the Interface Setup Menu as described beginning on page 26 with the exclusion of the IP Port. Note that changing the values of some of these features may cause additional features to be displayed. For instance, changing WLAN WEP Bits from “0”, or Off, to “64” or “128” will cause the “WEP Key 1-4” features to be displayed so that the appropriate sized encryption key(s) may be entered.
To print out the current Wi-Fi configuration details, you may press and hold 
Enter Button until “Printing Setup” is displayed. This feature is especially useful for obtaining the current IP address when assigning addresses via DHCP. When doing so, be sure to wait several seconds after turning the printer on to allow it to establish a connection with the network and be served an address.
The 
Wireless Indicator will light whenever the printer is currently receiving a print job.
When operating in Infrastructure mode, the printer will attempt to conserve battery power whenever possible by placing the Wi-Fi interface into a low power mode when not communicating. However, according to the IEEE 802.11b standard, the printer must be granted “permission” from the network’s Access Point before operating in the low power mode. Since different Access Point manufacturers implement this feature differently, the amount of power saving actually achieved varies. The actual power saving also varies with the amount of network traffic.
