The twenty-first century presents an overwhelming demand for integrated communication. It is consequent upon this that Unified Communication (UC) as an emerging technology seeks to provide a platform where people and businesses are able to interact with little or no limitations, irrespective of location. Suffice it to say that for a reasonably long time, people and especially organisations have invested heavily in implementing two parallel communication channels â€“ one centred on a voice carrying network such as telephony, voicemail and lately, video conferencing while the other is centred on a data carrying network such as e-mails, data, instant messaging etc. However, it is worthy of note that the implementation of an integrated technology such as UC, would require a corresponding deployment of efficient Quality of Service (QoS) mechanisms. Consequently, this paper seeks to discuss the concept of QoS as it affects UC.