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REDWOOD CITY, Calif. – January 28, 2015 –Dell’Oro Group, the trusted source for information about the networking and telecommunications industries, reported that spending in voice core key growth segments, LTE and IP Multimedia Subsystem (IMS) Core, will continue to increase over the next five years, driving revenue growth in the overall Carrier IP Telephony market.

“Voice over LTE and Voice over WiFi are now the main drivers to voice core revenues in the future,” said Chris DePuy, Vice President at Dell’Oro Group. “Given that the components of these services now represent over half of revenues, we are expecting a one-percent compound annual growth rate for this segment over the next five years,” concluded DePuy.

Revenue projections for the combined SBC, VAS and IMS Core markets reveal an eight percent compounded annual growth rate over the forecast period. The forecast report includes an analysis and estimate of NFV licenses for the SBC, IMS Core and VAS markets. The forecast report details projections for Voice over LTE (VoLTE) subscribers, IMS Core equipment, Softswitch and Media Gateway equipment, and Enterprise Session Border Controllers. Markets are included for vendors such as Alcatel-Lucent, Broadsoft, GENBAND, Huawei, Mavenir, Metaswitch, Nokia Networks, Oracle, Sonus Networks, and ZTE.


For more details or to purchase the Dell’Oro Group Carrier IP Telephony 5-Year Forecast Report contact Julie Learmond-Criqui at +1.650.622.9400 x244, or email at


As the trusted source for market information about the networking and telecommunications industries, Dell’Oro Group provides in-depth, objective research and analysis that enable component manufacturers, equipment vendors, and investment firms to make fact-based, strategic decisions. For more information, contact Dell’Oro Group at +1.650.622.9400 or visit