19 May 2017
| Alan Burkitt-Gray
Carriers owned by SK Telecom and KPN have shared live commercial international voice over LTE (VoLTE) over their multiservice IPX networks for the first time.
Both mobile operators – in South Korea and the
Netherlands respectively – said they were using the
services to deliver high-definition, low-latency, crystal-clear
voice services internationally to their 4G LTE consumers.
KPN’s iBasis and SK Telink, the wholesale partners
involved, said they are preparing for a further smooth
commercial rollout of VoLTE interworking to their subscribers
in South Korea and the Netherlands.
South Korea was the first country to launch national VoLTE in
2012 while KPN launched its national VoLTE service in
"There is no room for error when it comes to high quality voice
calls," said Wonyoung Yun, CEO of SK Telink. "Like us, KPN and
iBasis equally share a strong quality and innovation focus on
VoLTE. In our position as pioneer with the ability to lead with
new technology, we have leveraged the extensive experience of
iBasis in voice-over-IP, HD voice and global IP
Feddo Hazewindus, CEO of iBasis, said: "We are extremely
pleased to have joined forces with SK Telink to establish the
first international VoLTE interworking connection for South
Korea, one of the highest penetrated LTE Mobile countries
worldwide and pioneer in VoLTE adoption and innovation."
Yun said the close collaboration "will help operators improve
speed and efficiency in their international deployment phase
and create new value for customers".
Hazewindus added: "The strong engineering and operational
collaboration between SK Telink and iBasis teams has managed to
solve multiple implementation challenges which are critical for
performing and maintaining high quality VoLTE services globally
and we are proud to have established this milestone
In addition to VoLTE interworking, the iBasis VoLTE solution
also supports VoLTE roaming and both local breakout and home