Every employer and employee will need to stay in constant communication with one another. You'll no longer be able to 'pop in their office' or walk to fellow co-workers desk to ask a question, share something or hold a meeting.
Making sure your employer has invested in software for e-mail, messaging and video chatting is vital; as well as a Communication Headset or pair of Headphones with a Microphone for every employee who interacts with one another virtually.