ZTE and Germany’s E-Plus partner for voice-over-LTE solution

VoLTE solution will help E-Plus provide high-quality voice services and guarantee high-bandwidth data services based on LTE access

ZTE and Germany’s E-Plus partner for voice-over-LTE solution

ZTE and German network operator E-Plus have announced a joint deployment of an IMS (IP multimedia subsystem) based core network infrastructure, which will form the basis for a commercial voice-over-LTE (VoLTE) service over the E-Plus network.

By using 4G LTE’s high-speed mobile communications technology, VoLTE provides high-quality voice services for end users through the IMS core network.

E-Plus – using ZTE’s technology – has deployed the IMS core network in just a few months and has already started testing VoLTE services for commercial use. Compared with CSFB (circuit switched fall back) technology that makes voice calls ‘fall back’ to the 3G network, VoLTE provides higher-quality voice services for end users and improves the user experience.

In addition, the eSRVCC (enhanced single RAN voice call continuity) flow for switching voice services from the 4G IMS network to the 3G CS network ensures that when a 4G LTE user migrates from a place covered by the 4G network to a coverage hole in the 4G network, the user's voice services can be smoothly switched to the 3G network. In this way, 4G LTE users can enjoy uninterrupted and stable voice services.

Christoph Bladoschewski, department manager voice and services at E-Plus, said: “It has become a tradition that E-Plus, with our strategic partner ZTE, lead the market in introducing new technologies in the core network. The introduction of IMS in such a short time is a true masterpiece by ZTE.”

Li Jun, CEO of ZTE Deutschland, said: "We are very honoured to provide IMS network and VoLTE solutions for E-Plus. ZTE's VoLTE solution will help E-Plus to provide high-quality voice services and guarantee high-bandwidth data services based on LTE access. ZTE’s implementation of the VoLTE technology will also help improve E-Plus's network profitability."

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