can a level 2 telepath maintain a connection with multiple "allies" for free (no effort committed)? does he need to spend effort to communicate with them through that link?

reading the two sections below leads me to believe it does not cost effort.

[![enter image description here][1]][1]

[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/WtWKIRwX.png
  [2]: https://i.sstatic.net/v5jGlko7.png