Yeastar Information Technology Co., Ltd.

Provides turnkey on-premises IP PBX hardware appliances featuring integrated analog FXS/FXO ports and digital T1/E1/J1 PRI trunking without recurring user licensing fees.

Offers dedicated on-premises PBX appliances paired with native internal telephony interface cards and media gateways to terminate analog lines and digital T1/E1/PRI circuits.

Maintains an industry-standard hybrid IP PBX platform supporting legacy analog, digital station deskphones, and T1/E1 digital trunk cards within its modular chassis.

Delivers robust hybrid communication platforms that use integrated hardware controllers and media gateways to support digital sets, analog endpoints, and legacy PSTN trunks.

Provides enterprise-grade communication servers with comprehensive hybrid connectivity options, including analog extensions, digital sets, and legacy trunk interfaces.

Specializes in hybrid SMB communication appliances that natively combine IP access with circuit boards for analog, digital UP0E, and ISDN/PRI trunks in a single chassis.

Facilitates on-premises hybrid deployments through Unified Communications Manager coupled with Cisco Catalyst/ISR voice gateways providing FXS/FXO and T1/E1 PRI termination.

Manufactures hybrid IP-PBX appliances engineered specifically to retain existing 2-wire analog infrastructure and proprietary digital deskphones while bridging to IP networks.

Offers hybrid IP voice platforms and versatile hybrid PBX appliances/gateways designed to bridge legacy analog phones, fax lines, and digital PRI circuits to SIP systems.

Sangoma is the primary steward and commercial backing organization behind Asterisk and FreePBX, offering both the open-source FreePBX software platform and commercial PBXact systems for self-hosted and on-premises business telephony.

3CX offers a widely adopted software-based IP PBX platform deployable directly on customer-owned on-premises servers, virtual machines, or self-hosted private cloud environments.

Bicom Systems specializes in turnkey PBX software with dedicated multi-tenant capabilities (PBXware Multi-Tenant Edition) designed specifically for enterprise and service provider multi-tenant voice deployments.

PortaOne delivers PortaSwitch, a carrier-grade, highly scalable Class 5 softswitch and multi-tenant unified communication software platform engineered for self-hosted telecommunication operators and enterprise providers.

Vodia Networks develops a versatile software IP PBX engineered with native multi-tenancy from the core, making it well suited for self-hosted multi-tenant setups and on-premise business phone system requirements.

Wildix offers a browser- and WebRTC-centric unified communications and IP PBX system capable of deployment in customer private clouds and on-premises virtual environments with multi-location network management.

Mitel offers MiVoice Business, an established enterprise software communication platform that can be deployed on private virtualized infrastructure or on-premises servers across multi-site environments.

Avaya provides the IP Office platform, enabling businesses to host feature-rich unified communications software on private servers, virtual machines, or appliances across distributed enterprise sites.

Sipwise develops the C5 platform, a multi-tenant softswitch and IP PBX software stack suited for service providers and large enterprises wanting self-managed or on-premises Class 5 VoIP telephony infrastructure.

Offers purpose-built appliance and virtual hybrid PBX platforms with digital station modules (such as DSM16p) specifically designed to support legacy proprietary digital phones from Nortel/Norstar, Avaya, Panasonic, and NEC, allowing businesses to retain existing digital desk phones without rewiring.

Provides hybrid IP PBX appliances and expansion modules supporting legacy and current proprietary digital telephone sets (including the 1400, 2400, 5400, and 9500 series), allowing enterprises replacing older PBXs to preserve existing digital endpoints while adding IP and SIP capabilities.

Supports hybrid enterprise PBX migrations through peripheral cabinets and digital line units that allow organizations to reuse proprietary digital station hardware alongside modern IP communications.

Delivers hybrid on-premises and IP PBX systems with dedicated digital line interface blades that natively run proprietary NEC digital station hardware (such as DT300 and DT400 series) while enabling IP migration.

Offers modular media gateways and hardware shelves supporting Alcatel-Lucent proprietary digital reflex and digital desk phones natively alongside full IP and cloud-connected capabilities.

Manufactures hybrid IP PBX systems equipped with digital station interface boards that accommodate proprietary digital handsets, bridging legacy endpoint infrastructure into modern VoIP platforms.

Provides modular IP PBX appliances and digital/TDM interface gateways designed to bridge existing digital telephony hardware and circuits into modern software-driven PBX deployments.

Offers pure-IP and hybrid unified communications platforms deployable with media gateways and digital station interfaces to integrate existing proprietary digital terminals during infrastructure refreshes.

Builds on-premises IP PBX hardware appliances paired with multi-port digital trunking and analog integration gateways to integrate existing legacy phone circuits and analog-adapted desk equipment into a cost-effective VoIP environment.

Produces the Mediant and MediaPack hardware gateway portfolios, providing enterprise and carrier-grade media conversion between legacy analog (FXS/FXO), digital (E1/T1 PRI, BRI), and SIP-based IP networks with integrated survivability and SBC capabilities.

Provides the Vega appliance family (such as Vega 60G, 100G/200G, and 400G), offering multi-port analog (FXS/FXO) and digital (PRI/BRI) bridging with built-in Enhanced Network Proxy (ENP) local survivability.

Manufactures the SmartNode family of hardware VoIP gateways and eSBCs, engineered for connecting analog POTS, ISDN BRI, and E1/T1 PRI circuits to SIP trunks and modern Unified Communications platforms.

Offers cost-effective analog and digital VoIP gateways, including the GXW4100 FXO, GXW4200 high-density FXS, and HT series, enabling integration of analog endpoints and PSTN trunks into SIP-based IP PBXs.

Provides dedicated high-density analog voice gateway appliances (such as the VG400 and VG420 Series) to terminate legacy analog POTS lines, fax machines, and emergency systems into Cisco Unified Communications Manager and SIP networks.

Supplies carrier-grade and enterprise access media gateways such as the G5 and G6 lines, converting high-density legacy analog copper loops and digital TDM interfaces into standard SIP architectures.

Provides the Total Access 900 and 900e series of IP Business Gateways, converting carrier SIP trunking into on-premises TDM analog FXS/FXO and digital T1/PRI interfaces for legacy PBX systems and branch survivability.

Specializes in secure, carrier-grade customer premises media gateways through its Mediatrix portfolio (such as the G7 and S7 series), linking legacy analog phones, fax lines, and digital ISDN trunks to SIP cores.

Manufactures modular, solid-state hardware VoIP gateways that allow flexible combinations of ISDN BRI/PRI, analog FXS/FXO, and GSM/LTE modules on a single device running beroNet OS for SIP conversion.