Guild Wars 2

‘Is it possible to speak to your whole guild or party with voice chat, if so how?’

Could someone please tell me if it is possible to use voice chat in game to let your whole guild or party hear you? If so how?
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Join our guild ‘The Grand Alliance’, by writing your name here or on this webpage after making an account on this:
http://world-mmo.webs.com/apps/forums/topics/show/8558349-guild-wars-2-guild-chat?page=last

Thank you!
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Also the webpage above is my you tube channel’s forum’s, please visit it and subscribe, I post Guild Wars 2 game play on it with a Pro game play recorder (and some other games as well).
Name of channel: MmoWorld2013
Channel Website: http://world-mmo.webs.com/
Channel link: http://www.youtube.com/user/MmoWorld2013?feature=mhee

Thank you!
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Not that I know, I use raid call, it’s like teamspeak but you can do all for free and have some nice options too. Then you only need to post the room in your guild main page to all the members see.