An Analog Telephone Adapter (ATA) is a device used to connect one or more standard analog telephones to a digital telephone system (such as Voice over IP) or a non-standard telephone system.

Learn More: Back to Basics - What is an ATA?

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Company: Atcom
Ports: 1 FXS port
Overview: Single-port voice gateway with built-in router and lifeline port support.

Company: Auerswald
Type: Communication center
Overview: Multi-line communication system supporting analog, ISDN, and VoIP connections.

Company: Grandstream
Ports: 2 FXS ports
Features: T.38 faxing, SIP TLS, SRTP encryption
Overview: Two-port analog telephone adapter with encryption and automated provisioning.

Company: Grandstream
Ports: 2 FXS ports
Features: T.38 faxing, SIP TLS, SRTP encryption
Overview: Updated version of the HT802 with enhanced performance and security features.

Company: Media5 Corporation
Ports: Up to 24 analog ports
Overview: Enterprise VoIP adaptors with SIP over TLS and SRTP security features.

Company: Polycom
Ports: 1 FXS port
Overview: Single-port ATA with T.38 fax support for home office applications.

Company: ReadyNet Solutions
Type: Wi-Fi router with built-in ATA
Overview: Dual-band Wi-Fi router with integrated two-line (AC1000MS) or one-line (AC1300MS) SIP ATA.

• Cisco Linksys PAP2 - Discontinued analog telephone adapter
• Cisco Linksys PAP2T - Discontinued two-port ATA with enhanced features
• Cisco SPA112 - Discontinued two-port analog telephone adapter
• Cisco SPA2100 - Discontinued phone adapter
• Cisco SPA2102 - Discontinued phone adapter with router
• Cisco SPA941 - Discontinued phone adapter
• Cisco WRP400/WRP500 - Discontinued wireless routers with built-in ATA (discontinued 2017)
• Grandstream HT486 - Legacy HandyTone model superseded by newer versions
• Grandstream HT502 - Legacy HandyTone model with router functionality
• Grandstream HT702 - Legacy HandyTone model superseded by HT802 series
• Netgear WGR615V - Discontinued wireless router with built-in ATA
• OBi 100/110/200 - Legacy OBiHAI devices (company acquired by Polycom)
• Telco AC-211 - Legacy ATA from defunct SunRocket service
• TP-Link TD-VG3631 - DSL modem/router combo with VoIP functionality

For new deployments, we recommend choosing from the current devices listed above.