am 940b4d1c: am 6037a056: Fix n-way conf call in SipPhone.

Merge commit '940b4d1c4548d3296ac9fc66cce0cc213b5aa8a8'

* commit '940b4d1c4548d3296ac9fc66cce0cc213b5aa8a8':
  Fix n-way conf call in SipPhone.