CH Tech EM405D user manual Default setting is Auto-Scan

of other tasks. In ad-hoc mode, wireless devices may communicate directly with each other and an access point is not needed. In this case, all devices on the network must be configured to use ad-hoc mode. The default network mode is: infrastructure.

SSID: The Set Service Identifier (SSID) is a name given to a wireless access point to identify the access point on a wireless network. Most access points can be configured to periodically broadcast the SSID or to keep it private. Wireless devices can query the network for known SSID and thus communicate with access points that do not broadcast it. The EM405D can be configured to communicate with any available SSID or to query for a specific SSID and use the owning access point if found. The default setting is to use any available SID.

Channel: The 802.11b specification defines a total of 14 frequency channels that can be used for wireless communication. However, not all channels may be available for use. For example, the FCC only allows for the use of channels 1 through 11 in the US; whereas most of Europe can use channels 1 through 13. Other countries or locations may differ. All wireless communication is done over a common channel. Another consideration in regards to channels is interference. Interference can occur between access points or may be caused by other equipment such as microwave ovens and cordless phones. The EM405D can be set to auto-scanmode in which the device searches for the best wireless channel or it can be configured to use a specific channel.

The default setting is: Auto-Scan.

Country: Some countries restrict certain channel ranges and other transmission properties. The EM405D should be configured for the country in which the device is being used. The default setting is: USA.

Security Settings: The EM405D supports WEP and WPA security protocols. WEP is an encryption protocol used for secure data transfers. WPA is an authentication protocol used to authenticate and associate a device and a wireless access point. WPA is not available in ah-hoc mode. The security settings must be set according to the wireless network being connected to.

The default settings are: WEP disabled and WPA disabled.

4.2.6 Performing the Configuration – Wired Ethernet

There are two ways to configure the wired version of the EM405D: a web-based interface and a Telnet interface. Both ways work equally as well and the choice of which to use is based solely on the user’s preferences. In either case, the IP address of the module must be known to perform the configurations. If the IP address of the module is not known, one can be assigned to the module as discussed in section 4.2.6.3.

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