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GCT Semiconductor and D2 Technologies Integrate VoLTE and IR.94 Video Call Into Chipset Solution for Mobile and Automotive (M2M) Applications

Joint Solution Validated With Top Tier U.S. and Korean Operators

SANTA BARBARA, CA and SAN JOSE, CA -- (Marketwired) -- 02/27/14 -- GCT® Semiconductor, a leading designer and supplier of advanced 4G mobile semiconductor solutions, and D2 Technologies, the market leader in embedded IP communications software platforms, today announced integration of D2's vPort 4G+ IMS software with GCT's GDM7243S 4G LTE mobile chipset to enable VoLTE and IR.94 IP video call functionality for mobile and machine to machine (M2M) devices. The two companies successfully completed interoperability testing (IOT) and demonstrated the joint solution in mobile and automotive applications with top-tier U.S. and Korean mobile network operators.

GCT's GDM7243S is the latest LTE solution that integrates a separate CPU for processing of VoLTE. D2's VoLTE software is completely ported and running inside GDM7243S without an external processor.

"GCT and D2 are committed to continued integration and testing to enable the commercialization of VoLTE in mobile smartphones and tablets, and in emerging applications such as M2M, automotive and fixed-wireless access routers," said Doug Makishima, chief operating officer for D2 Technologies. "As more device types adopt LTE-based technology, the successful integration of IMS IP communications capabilities such as VoLTE, IR.94 video and RCS 5.1 / joyn, represents an important enabler for OEMs and network operators seeking to deliver evolved services."

"We are pleased to continue working closely with D2 and reaching this significant milestone for VoLTE, demonstrating bidirectional voice and video communication between a machine and smartphone user," said Alex Sum, vice president of sales and marketing at GCT Semiconductor, Inc. "This opens the door to carriers and mobile device makers, showing that this communication is possible on a commercial LTE network."

D2's mCUE® 4G is an advanced IMS IP communications software solution for the Android OS platform, supporting the IR.92 VoLTE, IR.94 video call and RCS (5.1 and joyn) GSMA standards to deliver IP communications features like HD voice, real time video call, instant message, presence, SMS and VCC on 3G, 4G LTE and Wi-Fi networks. As the first IP communications client deployed by a 4G mobile operator, it is field proven and delivers carrier-grade voice and video quality, and demonstrated interoperability. mCUE 4G is a complete communications client, providing all key layers from the UI and protocol stacks, a fully embedded media engine that includes a complete VoIP DSP module with wideband CODECs, and optimized video framework integration that supports native hardware video acceleration. It is available in both embedded (native) and downloadable app versions, and is GSMA joyn accredited.

About D2 Technologies
D2 is the recognized leader in VoIP and converged IP communications software for devices used in 4G and next-generation IMS networks that deliver voice over LTE (VoLTE), VoIP over Wi-Fi, or Rich Communication Suite (RCS) joyn services. Manufacturers and service providers rely on D2 software to deliver carrier-grade IP communications across any network (LTE, WiMAX, cellular, Wi-Fi, broadband, PSTN), service (voice, video, IM chat, SMS, presence/status, etc.) and system (carrier, IPPBX, UC, OTT, social network, etc.) for a broad range of fixed and mobile devices. Please visit:

About GCT Semiconductor, Inc.
GCT Semiconductor is a leading fabless designer and supplier of advanced 4G LTE and WiMAX semiconductor solutions. GCT's market-proven LTE solutions, commercially available since 2010, have enabled fast and reliable LTE connectivity to numerous commercial devices such as smartphones, tablets, ultrabooks, hotspots, USB dongles, routers, M2M applications, etc., for the world's top LTE carriers. GCT's system-on-chip solutions integrate radio frequency, baseband modem and digital signal processing functions, therefore offering complete 4G platform solutions with small form factors, low power consumption, high performance, high reliability and cost effectiveness. For more information, visit

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D2 Technologies

Doug Makishima
D2 Technologies
Tel: +1.805.564.3424
Mobile: +1.408.835.9686
Email: Email Contact

Jeff Denenholz
Tel : +1.253.444.5477
Mobile : +1.206.437.9810
Email : Email Contact

GCT Semiconductor

Alex Sum
VP Sales/Marketing
GCT Semiconductor, Inc.
Tel: +1.408.434.8022
Mobile: +1.408.835.9686
Email: Email Contact

Simon Lee
Product Marketing Director
GCT Semiconductor, Inc.
Tel : +1.408.434.8040
Mobile : +1.408.497-6401
Email : Email Contact

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