"This is not a new jobs announcement. Rather, it's a new detail to the reorganisation of our customer services operations," said a BT spokesman.
The call centres will be replaced with 30 customer contact centres complete with "state-of-the-art technology", the company said, but it would not give details of the new systems.
"With the way that technology has changed, it is perfectly reasonable to close some centres and upgrade others. Customers will experience no change in exisiting levels of service. In fact, when the new centres are completed in the next two years, customers should find service to be even better," said BT.
More than 100 call centres, employing 13,600 people, will remain.