Cisco ATA191 2 FXS Port Analog Telephone Adapter - Open box

The Cisco ATA191 Analog Telephone Adapter brings traditional analog phones and fax machines into advanced VoIP networks. Designed for businesses and service providers transitioning to IP telephony, this adapter offers secure voice quality, enterprise-grade reliability, and flexible integration with Cisco Unified Communications solutions.

Compact and efficient, the ATA191 includes two FXS ports and robust SIP support, along with built-in security protocols like TLS and SRTP. It’s the ideal choice for organizations upgrading legacy analog infrastructure to modern IP-based systems without replacing existing analog endpoints.

✔ Key Features & Benefits

✔ Dual FXS ports for connecting analog phones or fax machines to VoIP networks
✔ Full SIP support with IPv4/IPv6 dual stack compatibility
✔ Enhanced voice quality with MOS > 4.0, echo cancellation, and adaptive jitter buffer
✔ Multiple telephony features including call transfer, conferencing, speed dial, and caller ID
✔ Centralized provisioning and remote management via HTTPS, TFTP, and SSH
✔ Secure boot, TLS encryption, sRTP for voice security, and AES configuration protection
✔ Wall-mountable compact design with LED indicators and PRT (Problem Reporting Tool)
✔ Ideal for extending Cisco UC to remote users, branches, or analog device integrations

✔ Ideal Uses

✔ Small businesses transitioning to VoIP without replacing analog devices
✔ Branch offices or remote users connecting legacy phones to Cisco UC
✔ Hotels or hospitals using analog phones integrated into IP systems
✔ Fax machine or modem connectivity in IP telephony environments

✔ Specifications

✔ Condition: Open Box – device has been unpacked and inspected, never deployed
✔ Brand: Cisco
✔ Model: ATA191 190 Series
✔ Physical Dimensions: 3.9 × 3.9 × 1 in (100 × 100 × 28 mm)
✔ Weight: 132.1 g (4.7 oz)
✔ Interfaces: 2 × RJ11 FXS ports, 1 × 10/100 Mbps RJ45 Ethernet, Reset/PRT button
✔ Indicators: LEDs for Power, Network, Phone 1, Phone 2, PRT
✔ Mounting: Wall-mountable
✔ Telephony Features: Call forward, call waiting, conferencing, caller ID, distinctive ring, MWI, hotline
✔ Audio Codecs: G.711 a-law/μ-law, G.729a, G.729ab
✔ Voice Enhancements: Full-duplex, echo cancellation, silence suppression, dynamic jitter buffer
✔ Fax/Modem Support: T.38 relay, G.711 pass-through
✔ Network Protocols: SIP, RTP, RTCP, TCP/UDP, DHCP, SNTP, LLDP, CDP, IPv4/IPv6 dual stack
✔ QoS Support: IEEE 802.1p/Q, DiffServ / ToS
✔ Security: TLS 1.1/1.2, HTTPS, SSH, sRTP, secure boot, encrypted configs
✔ Power Input: 5V DC @ 2.4A, Adapter input: 100–240V AC, 50/60Hz
✔ Power Consumption: 5W
✔ MTBF: 300,000 hours
✔ Operating Temperature: 0°C to 40°C
✔ Humidity Range: Operating 10–90% RH 
✔ Compliance (Regulatory): CE, FCC Part 15, VCCI, ICES-003
✔ Compliance (Safety): UL 60950-1, IEC/EN/CSA standards
✔ Compliance (EMC): CISPR 32, EN 55032, EN 55024, IEC 61000 standards
✔ Warranty: 3 Month Carry-in Warranty
✔ What's in the Box: Cisco ATA191 Analog Telephone Adapter