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Transform your old ISDN30 with PSBA SIP

PSBA’s service offering has expanded with the launch of our SIP (Session Initiation Protocol) solution – a cost-effective IP alternative to traditional voice services. Whether you are looking to make the move to SIP from ISDN30 for the first time or seeking to move from another SIP provider, PSBA can help you on your journey.

Contact Us

If your organisation is interested in joining PSBA or learning more about available services, please e-mail PSBA.new.connection.enquiries@bt.com and a member of our dedicated team will be in touch.