HomeProducts AVST Products CX-S, CX-E (formally CallXpress), CX-C and Repartee




The CX-S is the right choice for any small or mid-size business that needs an enterprise-class UC solution at an incredible price point! CX-S is an easy to deploy turnkey UC solution backed with a 3-year "bumper-to-bumper" software and hardware warranty.


CX-E (formerly CallXpress)

CX-E is the industry's most interoperable UC platform delivering best-of-breed UC mobile, voice and business process solutions to the enterprise. By deploying CX-E, enterprises can avoid single vendor lock-in, achieve high availability and disaster recovery objectives and centralize their UC infrastructure into a data center/ private cloud configuration.



CX-C is a cloud-based UC platform designed to support the requirements of service providers, wireless carriers and network operators. CX-C is a highly scalable and interoperable cloud platform delivering rich UC features coupled with resiliency and administrative control.

AVST Repartee

Repartee LX

Repartee® LX is an easy-to-deploy messaging system designed for small to mid-size businesses to cost effectively manage their voice communications, improve customer service and increase productivity. Built on a proven Linux platform, Repartee delivers feature-rich applications including hospitality, call processing, personal call control, voicemail, automated attendant, unified messaging, and fax.

CX-E Server

Whether you're a small business poised to grow or a large corporation with a global presence, you're sure to find the perfect fit for your communications needs among AVST's portfolio of high performance, highly reliable CX-E servers.


XpressCare is a program that provides full software protection for your AVST product in one easy-to-buy plan. XpressCare helps to maximize the benefits of your system through continuous software improvements and proactive service. This ensures optimal software performance, continued stability, and on-going compatibility, which equates to increased customer satisfaction and smooth operations.