Telekom Austria on Wednesday claimed to be the first operator in the EU to migrate its fixed-line voice service to VoIP.
The four-year project saw its domestic arm A1 integrate 1,480 switching centres and 2.3 million fixed-line phone customers with its all-IP network. The migration was carried out gradually across Austria from west to east at a rate of 50 switching centres per week.
Phone service interruptions were limited to a few minutes and took place during the night. Telekom Austria implemented temporary call forwarding to ensure calls to emergency services were connected.
"We also had to implement major changes in a great number of IT systems, ranging from billing to customer service," explained Günther Ottendorfer, CTO of Telekom Austria, in a statement. "However, the Austrian team was able to ensure a smooth migration process and meet the planned time schedule, turning this challenging undertaking into a showcase project."
To facilitate the migration, Telekom Austria deployed Huawei's multi service access node (MSAN) and an advanced IP soft-switch (AIPS) provided by Kapsch CarrierCom on its IP network.
"The integration of fixed net telephony into our all-IP data network was one of the most comprehensive and complex projects in the history of our company," said Ottendorfer.