Original sentence: Unified communications (UC) is the integration of non real-time communication services such as unified messaging (integrated voicemail, e-mail, SMS and fax) with real-time communication services such as instant messaging (chat), presence information, IP telephony, video conferencing, call control and speech control
Edited sentence: Unified communications (UC) is the integration of real-time communication services such as instant messaging (chat), presence information, IP telephony, video conferencing, call control and speech control with non real-time communication services such as unified messaging (integrated voicemail, e-mail, SMS and fax)