How to call internationally using Cisco Phone or Cisco Jabber Client
If you need to make an international call you will first need to have "International Calling" access turned on. A ticket to the Solution Center can grant you that.
To make an international call using your Cisco Phone or Cisco Jabber Client Dial:
1+011+Country Code+Area/City Code+Phone Number.
For example, if you are trying to call someone in Brazil (country code 55), in the city of Rio de Janeiro (city code 21), you would dial 011 - 55 - 21 - XXXX-XXXX. Countries employ varying numbers of digits for area/city codes and telephone numbers. Don't be surprised if the number you are trying to call has more or less than three plus seven digits.