Voice chat is avalible in Siege game mode. In the heat of battle it may be hard to find time for typing. From the other hand, good communication is the key to succes... Voice chat sloves this problems providing you the quick acces to all basic commands needed in Siege. For example pressing voice chat button and than "1" (Attack) and "2"(Secondary Objective) will result in the info "Attack the Secondary Objective!".
When used your character will "shout" the message. A speaker icon will apear over your head for your allies to see that its you who is speaking. Also the chat message with the given instruction will be generated on your team chat.
ATTENTION! Your enemies will also hear the voice chat (you shout it out after all...) if only they are in the short distance from you. The longer distance- the less loud the voice becomes.