Telefónica Germany has selected Ericsson as main supplier to upgrade their network to support VoLTE. VoLTE has been deployed in all areas where Telefónica has LTE coverage in Germany. The commercial launch will take place once Telefónica has secured the full VoLTE device eco-system for mass-market launch.

VoLTE will provide users with superior HD voice call quality, instant call-set-up, and allow simultaneous usage of superfast LTE data services during calls. Operator is also deploying Ericsson's SRVCC (Single Radio Voice Call Continuity) functionality to enable seamless handover of ongoing voice calls from LTE to circuit-switched 3G and 2G networks.

The contract scope includes: Ericsson IMS (IP Multimedia Subsystem) products: CSCF (Call Session Control Function), MTAS (Multimedia Telephony Application Server), MRS (Media Resource System) and System Integration Services for Telefónica's multivendor network. The services provided include deployment and end-to-end design and verification, as well as fault analysis.

According to Ericsson, company has signed 120 commercial IMS contracts worldwide for both fixed- and mobile access, of which around 70 IMS systems are running live traffic.