{{[[Template:{{{1}}}|{{{1}}}]]}}

Description

A template link with a variable number of parameters (0-20).

Syntax
{{t|<parameter1>|<parameter2>|<parameter3>|<parameter4>|<...>|<parameter20>}}
Source
Improved version not needing t/piece subtemplate developed on Templates wiki see the list of authors. Copied here via CC-By-SA 3.0 license.
Example
{{t|<param1>|<param2>}}