Masterton is the 13th town in New Zealand to complete the rollout of UFB.
Ms Adams compared UFB with the "rollout of the railroad" in the growth that happened once it was laid.
"This is the digital equivalent. In 10 years' time, we will be using this technology in ways we can't even imagine today."
Ms Adams told mayor Patterson it was now time to see "who takes up the baton and the challenge, mayor" of using the connection.
Mrs Patterson thanked the "local contractors who did the work on the ground" and said the capability of the network "is really important" to the Masterton district.
Host Adrian Evans, director of South Wairarapa Veterinary Services, said the UFB means he can co-ordinate the movements of 40 staff across four sites, making appointments in real-time and avoiding double-ups in travel, for instance two vets working on neighbouring farms. X-rays and other scans, rather than needing to be stored onsite, are now uploaded to the internet, making them easier to share with others.
Leaders from Chorus, Crown Fibre Holdings, and Downer were also present at the announcement. Project manager Shawn Dancer from Chorus said the Masterton rollout covers 7800 premises and 50 cabinet areas, and Masterton had been "a good council to work with".