Cisco ATA 191 Multiplatform 2-Ports FXS Analog Telephone Adapter – ATA191-3PW-K9

Cisco ATA 191 Multiplatform 2-Port FXS Analog Telephone Adapter — ATA191-3PW-K9

The Cisco ATA 191 Multiplatform (ATA191-3PW-K9) is a 2-port FXS analog telephone adapter that connects traditional analog phones and fax machines to SIP-based VoIP networks. Designed for multiplatform deployments, it enables seamless migration from legacy PSTN infrastructure to modern IP telephony without replacing existing analog endpoints.

Key Features

• 2 FXS ports for connecting analog phones or fax machines to VoIP networks
• Multiplatform SIP firmware for broad third-party UC platform compatibility
• Supports G.711, G.722, G.729 voice codecs for high-quality audio
• Built-in NAT traversal for reliable operation behind firewalls and routers
• Web-based management interface for easy configuration
• Compact desktop form factor

Product Specifications

• Part Number: ATA191-3PW-K9
• Manufacturer: Cisco Systems
• Model: ATA 191 Multiplatform
• OEM Status: Genuine Cisco OEM
• FXS Ports: 2
• Protocol: SIP (Multiplatform)
• Voice Codecs: G.711 (a-law/u-law), G.722, G.729a/b
• Network Interface: 1x 10/100 Mbps Ethernet (RJ-45)
• Power: External AC adapter (included)
• Management: Web-based GUI, TFTP/HTTP provisioning

Communication Specifications

• FXS Ports: 2 (RJ-11)
• Supported Codecs: G.711 a-law, G.711 u-law, G.722, G.729a, G.729b
• DTMF: In-band, RFC 2833, SIP INFO
• Fax Support: T.38 fax relay, G.711 fax passthrough
• Echo Cancellation: G.168 compliant
• VAD / CNG: Yes

Connectivity Specifications

• WAN/LAN Port: 1x 10/100 Mbps Ethernet (RJ-45)
• NAT Traversal: Built-in STUN support
• Provisioning: TFTP, HTTP, HTTPS
• Management: Web-based GUI
• Compatible Platforms: Cisco BroadSoft, Asterisk, FreePBX, and other SIP-based UC platforms

Use Cases

• Connecting legacy analog phones to SIP-based VoIP systems
• Fax machine integration with IP telephony infrastructure
• PSTN-to-VoIP migration for small and medium businesses
• Branch office analog endpoint connectivity on UC platforms

Compatibility

• Compatible with SIP-based UC platforms including Cisco BroadSoft, Asterisk, FreePBX, and others
• Multiplatform firmware — not compatible with Cisco Unified Communications Manager (CUCM)
• Requires SIP-capable IP PBX or hosted VoIP service
• Verify compatibility with your specific UC platform before ordering

Frequently Asked Questions

What is the difference between ATA191-3PW-K9 and the standard ATA191?

The ATA191-3PW-K9 runs Cisco”s Multiplatform SIP firmware, making it compatible with third-party SIP UC platforms. It is not compatible with Cisco CUCM, which requires the standard ATA191.

Can I connect a fax machine to the ATA 191?

Yes, the Cisco ATA 191 supports T.38 fax relay and G.711 fax passthrough, enabling fax machine connectivity over VoIP networks.

How many analog phones can I connect?

The ATA191-3PW-K9 has 2 FXS ports, allowing you to connect up to 2 analog phones or fax machines simultaneously.

The Cisco ATA 191 Multiplatform (ATA191-3PW-K9) is the ideal solution for businesses migrating from analog PSTN to SIP-based VoIP while retaining existing analog endpoints. Order today for seamless, cost-effective analog-to-IP telephony integration.