Multi vendor solutions are now more common than in previous years due to the move towards open industry standards. This has given businesses the power to choose what works for them at every layer of their communications infrastructure from the hardware through to the applications. Avaya has designed its IP telephony solutions to be interoperable with most vendors’ voice and data networks, including Cisco. 4Net has worked with many customers to deliver multi vendor solutions that have provided extra functionality, features and benefits to the communication infrastructure that may not have been achieved through a single vendor solution whilst still maintaining a high QoS.