Hi Lori,
A hosted virtual call center platform such as Telax or inContact will allow you to operate multiple locations through a single and cohesive cloud-style solution. 8x8's Virtual Contact Center is another good option if your call center locations are small or mid-sized.

@Lori, bpm'online call centre Agent Desktop has integrated with Avaya for many customers. Take a quick look http://www.bpmonline.com/products/crmagent.

Most intuitive user-interface keeps the employees engaged in the work, while the Management can literally "see the big picture" as provided by the Business Process Management platform.