asterisk users - Apr 2014 - How best to match hexadecimal values in dialplan pattern matching ?

Hi,

Quite often I told myself it would be convenient to have a dedicated
letter, such as E, to match [0-9A-Ea-e] in dialplan pattern matching just
like X match [0-9] or Z match [1-9].

This happens when I want to match a MAC address in my dialplan.
In this case, writing [0-9A-Ea-e] twelve times is not very pleasant.

What would you say about that ?
What is the best way to match a MAC address with Asterisk 11 and above ?

Regards
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