What are the Call Surcharges mentioned on my invoice?

Phone Calls are billed according to the monthly updated Call Charges. However, in certain special cases surcharges are applied to calls. This happens in the following scenarios:

• Non-EEA to EEA calls
  When calls are setup to a country European country, with a FROM phone number (CLI) originating outside the European Economic Area, a special surcharge rate of 0.25 EUR per minute will be added on top of the regular Call Charges.
  
  
• Invalid FROM phone number
  Customers are obliged to use a valid FROM phone number (CLI) when making calls on the platforms of our carriers.
  A surcharge rate of 0.25 EUR per minute will be added on top of the regular Call Charges for calls matching the following criteria:
  
  • Missing CLI in FROM, PAID or Remote Party ID SIP header
  • CLI is too short (<5 digits)
  • CLI is too long (15> digits)
  • CLI is not associated with a valid country prefix (e.g. +31)