IP phones do not come with international dialling capability as standard.
If you regularly need to place international calls, contact the Digital IT Service Desk who will arrange for international dialling to be enabled on your chosen extension. As with all calls, international calls are charged to the relevant department, therefore any request for international dialling will need authorization from the budget approver.
If you need to place international calls only rarely, then on each occasion you can call the operator (dial ‘0’), who will take some details before placing the call on your behalf. The cost of the call will then be charged to your department.