Cisco ATA 191 2-Port RJ11-to-Ethernet Multiplatform Analog Telephone Adapter

Overview

The Cisco ATA 191 2-Port RJ11-to-Ethernet Multiplatform Analog Telephone Adapter is designed to connect traditional analog telephones, fax machines, and paging systems to modern IP networks. It enables businesses to keep their existing analog devices while transitioning to VoIP communication, supporting both IPv4 and IPv6 protocols for broad network compatibility. With two FXS ports and a 10/100 Mbps Ethernet connection, it provides reliable voice communication in small office and enterprise environments.

Key features

• Two FXS ports that allow independent SIP registrations, enabling multiple analog devices to operate simultaneously over the network
• Dual-stack support for IPv4 and IPv6, ensuring compatibility with current and future network infrastructures
• Wired RJ-45 Ethernet port delivering stable 10/100 Mbps connectivity for consistent network performance
• Compact form factor measuring 3.9 inches by 3.9 inches by 1 inch, making installation in tight spaces straightforward
• Low power consumption of 5 watts, helping to reduce operational energy costs
• One-year warranty included to provide users with added confidence and support

Key specs

• Ports: 2 FXS RJ11 ports for analog devices
• Network interface: 1 RJ-45 Ethernet port, 10/100 Mbps
• Protocol support: SIP with independent registrations on each port
• IP versions supported: IPv4 and IPv6 dual stack
• Dimensions: 3.9 x 3.9 x 1 inches
• Power consumption: 5 watts
• Warranty: 1 year

Connectivity and compatibility

This adapter integrates seamlessly into existing IP telephony systems, supporting standard SIP protocols for voice communication. Its dual-stack IP support ensures it works well with both legacy IPv4 networks and newer IPv6 infrastructures. The two FXS ports allow connection of analog telephones, fax machines, or paging systems, making it a versatile choice for businesses that want to preserve their current equipment while upgrading their network.

Ideal uses and environments

The Cisco ATA 191 fits well in small offices, enterprise branches, and cloud-based communication setups where maintaining analog devices is important. It is a strong choice for organizations seeking a cost-effective and scalable way to migrate to IP telephony without replacing existing phones or fax machines. Its compact size and low power needs make it suitable for environments with limited space and a focus on energy efficiency.