Takayuki Miyoshi on "[Plugin: Contact Form 7] Make sure field info is correct"

Here are examples:

[tel tel-123 id:testidtel class:testclass 12/20 "000-000-0000"]
[date date-123 class:testclass id:testiddate min:2013-04-15 max:2013-04-29 step:2 "2013-04-22"]

The current version only accepts numbers, '-' and '+' characters in tel input validation. Next update will additionally accept space, '(' and ')'.