Estech Systems IP, LLC v. Zoom Video Communications, Inc.

I. BACKGROUND

22 Estech, a Texas Corporation, is an affiliate of Estech Systems, Inc. (“ESI”). Compl. ¶ 8. 23 ESI is a US-based provider of end-to-end business phone solutions. Id. ESI offers “a full 24 solutions portfolio of modern business phone systems, including Cloud, Hybrid, Pure IP, and SIP 25 dial tone products.” Id. ¶ 11. ESI’s products include “the most integrated cloud PBX in the 26 market—the award-winning ESI Cloud PBX; Voice over IP (VoIP) products and systems; and on- 27 premises products.” Id. ¶ 12. VoIP transmits and receives voice communications over data networks, such as the internet or private networks, using the internet protocol. Id. ¶ 13. The ’298 Patent is titled “Phone Director in a Voice Over IP Telephone System” and relates to a system that allows a user on one local area network (“LAN”) to view a list of phone extensions associated with another LAN. Estech alleges Zoom directly infringes “at least claim 13” of the ’298 Patent. Compl. ¶ 36. Claim 13 recites the following: 13. A telecommunications system comprising: a first IP telephone coupled to a first IP server within a first LAN; 7 second and third…