• PSTN breakout occurs at gateway located closest to the PSTN destination.
• Make sure it is legal in the country you are doing this

• Implication of using Local Route Group
• Number of of route patterns and route lists required for TEHO is reduced from N x N to N + 1 (N is the number of sites).
• The number of partitions and CSS is reduced from N to 1
• The number of gateways, route groups, and device pool remains the same (N)
• If combined with globalized dialing, TEHO can be used worldwide using the simple dial plan model (N + 1 route patterns and route lists), regardless of different local dial rules.

• Call from Boulder phone to Herndon - TEHO destination
  

• Call from Boulder phone to NON TEHO destination
  

• Call from Herndon phone to NON TEHO destionation
  

• Call from Herndon phone to Boulder - TEHO destination
  

• Call from Herndon phone to Herndon destination
  

• Route pattern for each area that can be reached at different costs; one per site, in different partition
• Putting in separate partition allow some control by placing them only on certain phone that you want to allow TEHO

Without Local Route Group

With Local Route Group

• Route patterns point to route lists (with different priorities of gateways: cheapest gateway first, local gateway next, then other gateway for additional backup if desired)

• Add site specific Route Pattern to the CSS of some phones that require TEHO
• Phone CSS for correct route-pattern selection