[shortdesc] High-performance 2-port Analog Telephone Adapter (ATA) for converting traditional analog devices to VoIP. Supports SIP, IPv4/IPv6 dual stack, T.38 fax relay, and secure cloud provisioning via TR-069. [/shortdesc]

[properties]

Model	Cisco ATA 191
SKU	ATA191-3PW-K9
Product Type	Analog Telephone Adapter
Ports	2 x RJ-11 FXS ports, 1 x RJ-45 10/100 Mbps Ethernet port
VoIP Protocol	Session Initiation Protocol (SIP)
Voice Quality	MOS > 4.0, Echo Cancellation, Jitter Buffer < 150 ms
Codec Support	G.711 a-law, G.711 u-law, G.729a, G.729ab, G.726
Fax Support	T.38 Fax Relay (Group 3), G.711 Pass-through
Networking	IPv4, IPv6, IPv4/IPv6 dual stack
Provisioning	TR-069, XML, HTTP, HTTPS, TFTP
Security	TLS 1.1/1.2, SRTP, AES Encryption, Secure Boot, SSH
Power Consumption	5W
Input Voltage	5V DC at 2.4A maximum
Dimensions (H x W x D)	100 x 100 x 28 mm
Weight	132.1 g (4.7 oz)
Operating Temperature	0 to 40 C
Humidity	10 to 90 percent noncondensing
Mounting	Wall mountable

[/properties]

[specifications]

FXS Interface	Ring voltage 40 to 90 Vpk configurable; Ringer Equivalence Numbers (RENs) 3 max
Line Characteristics	On-hook voltage -46 to -56V; Off-hook current 25 mA +/- 10 percent
Impedance	600 ohm resistive, 900 ohm resistive, or 220 ohm + 820 ohm with 120 nF
Frequency Response	300 to 3400 Hz
Return Loss	Up to 26 dB (600 ohm, 300 to 3400 Hz)
Noise Level	Idle channel noise < -65 dBm
Network Protocols	TCP, UDP, RTP, RTCP, HTTP, HTTPS, TFTP, ARP, DNS, DHCP, CDP, LLDP, PPPoE
Quality of Service	IEEE 802.1p/Q (VLAN tagging), DiffServ, ToS
Telephony Features	Call waiting, Caller ID (Bellcore/BT/ETSI), 3-way conferencing, MWI, DND, Speed dial
Audio Features	VAD, Comfort Noise Generation (CNG), Silence Suppression, Adaptive Jitter Buffer
Management	Web-based administration, IVR, SNMPv3, Syslog, PRT button (Problem Reporting)
Security Hardware	Secure Boot, Image Authentication, Password-protected reset
Reliability	MTBF 300,000 hours
Compliance	CE Mark, UL 60950, CAN/CSA-C22.2 No. 60950, FCC Part 15 Subpart B

[/specifications]

Seamlessly Connect Analog Devices to Modern IP Networks

The Cisco ATA191-3PW-K9 Analog Telephone Adapter enables businesses to transform traditional analog devices into fully functional IP endpoints. Designed for enterprise, SMB, and cloud communications environments, this adapter bridges legacy telephony with modern VoIP infrastructure while ensuring reliability, security, and cost efficiency. It is an ideal solution for organizations transitioning to IP-based communications without replacing existing hardware.

Key Benefits & Features

• Dual FXS Ports: Connect two analog devices simultaneously with independent SIP registrations for flexible deployment across voice, fax, or paging systems.
• Enterprise-Grade Voice Quality: Advanced echo cancellation, voice activity detection, and jitter management deliver clear and natural audio performance with a MOS score above 4.0.
• Dedicated PRT Button: Improves serviceability with a physical Problem Reporting Tool button for immediate log collection and event reporting.
• Secure VoIP Communications: Supports TLS 1.2, SRTP encryption, and HTTPS provisioning to protect sensitive signaling and media traffic.
• Cloud & Zero-Touch Provisioning: TR-069 and XML-based configuration files enable fast, automated deployments across distributed remote environments.
• Broad Platform Compatibility: Fully optimized for Cisco Webex Calling, BroadWorks, Metaswitch, and Asterisk call control systems.

Ideal Use Cases

• Enterprise VoIP migration while retaining analog phones, fax machines, and overhead paging.
• Small office and branch deployments requiring cost-effective, high-density telephony.
• Cloud calling environments using SIP-based platforms like Webex Calling.
• Hospitality and retail environments where legacy analog device integration is essential.

Technical Specifications

• Ports: 2 x RJ-11 FXS, 1 x RJ-45 10/100 Ethernet
• Protocols: SIP, TCP, UDP, RTP, RTCP, HTTP, HTTPS, DHCP, CDP, LLDP
• IP Support: IPv4, IPv6, dual stack
• Voice Codecs: G.711 a-law/u-law, G.729a/ab, G.726
• Fax Support: T.38 real-time fax relay and G.711 pass-through
• Power Consumption: 5W
• Dimensions: 100 x 100 x 28 mm
• Mounting: Desktop or wall-mountable
• QoS: IEEE 802.1p/Q, DiffServ, VLAN tagging
• Security: TLS 1.1/1.2, SRTP, AES encryption, Secure Boot

Upgrade Your Voice Infrastructure Today

Modernize your communications without replacing existing devices. Order today and enable seamless VoIP integration for your analog hardware.