Avaya is a global leader in communication systems, applications and services and has a dedicated division focused on the needs of small and medium sized companies. The Avaya IP Office system is an office PBX and is Avaya's "All -in-one" communication solution. Using IP technology, the Avaya IP Office delivers more functions at a lower cost giving your company improved profitability, productivity and competitive advantage. Enterprise features include all the normal PBX features including:

• Networking
• Conferencing
  
• Time and Call management
• Multi level Auto Attendant
• Directory
• Call transfer
• Multi type handset support
• VoIP enabled
• Convergence
  
• Voicemail and more...
  

VoIP.co.uk's SIP Trunking product, VST IP PBX, empowers the Avaya IP Office by fully enabling SIP functions and easily scales to the size of the implementation.  A typical VST would be configured with the following features:

• DDI for main office. This could be routed via the Avaya IP office Auto Attendant
• DDI for each department. A sales number can be routed to a sales "group"
  
• DDI for each user
• SIP account for the Avaya IP office to use for incoming and outgoing calls
  
• Controlled number of allowed concurrent calls ensures that network bandwidth usage is available
• A-Z tariff plan

VoIP.co.uk's VST IP Teleworker product is the ideal partner to VST IP PBX and calls back to base are of course free of charge.