Do I have to click enter on my key board for the Voip phone to dial out?

Do I have to click enter on my key board for the Voip phone to dial out? Or is there an add icon I can add on to Yahoo messenger to click and dial out?

Related posts:

1. Is it possible to use VOIP phone service to connect to AOL dial-up?
2. How will you dial VOIP numbers from your normal phone while using an ATA?
3. What is a good cordless VOIP phone to use with Yahoo Messenger?
4. How can I use my pc to answer my voip phone from the cable company ?
5. Does anyone use a voip phone instead of a landline for your work at home job?