For installation of the binding, please see Wiki page Bindings.

In order to bind an item to a NTP query, you need to provide configuration settings. The easiest way to do so is to add some binding information in your item file (in the folder configurations/items`). The syntax for the NTP binding configuration string is explained here:

nh="[timeZone][:locale]"

where the parts in {{{[are optional. If no or an incorrect time zone is configured it defaults to {{{TimeZone.getDefault()}}}. If no or an incorrect Locale is configured it defaults to {{{Locale.getDefault()}}}.

Here are some examples of valid binding configuration strings:

ntp="Europe/Berlin:de_DE"
ntp="Europe/Berlin"
ntp=""

As a result, your lines in the items file might look like the following: ae437745fef791172e2cba4be47fbb1f

If you like to post the quried time to the knx-bus your line might looke like: 49ab0754c9ad1691acbbc634e4b41a78 where 11.001 is the KNX date type and 10.001 is the KNX time type

Example configurations can be found https://code.google.com/p/openhab-samples/wiki/BindingConfig?ts=1370629305&updated=BindingConfig here.