Cisco ATA 191 2-Port Analog Telephone Adapter for VoIP Integration
The Cisco ATA 191 Multiplatform Analog Telephone Adapter is a 2-port handset-to-Ethernet adapter that brings traditional analog devices into the IP world. This adapter turns traditional telephone, fax, and overhead paging communications devices into IP devices for greater cost-effectiveness. Ideal for enterprise networks, small offices, and unified communications as a service from the cloud, the ATA 191 protects your existing investment in analog systems while providing a smooth migration path to voice over IP.
Key Features
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Dual FXS Ports: Two standard FXS ports which can be configured independently as two Session Initiation Protocol (SIP) registrations
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Superior Voice Quality: Offers clear, natural-sounding voice quality via advanced preprocessing, high-performance echo cancellation, voice activity detection, and comfort noise generation
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Comprehensive Security: Provides a complete security solution for both media and signaling with SRTP and SIP over TLS support
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Zero-Touch Provisioning: Enables zero-touch provisioning via TR-069 and XML configuration files for easy deployment
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Problem Reporting: Dedicated PRT button for problem reporting and log collection improves serviceability
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IPv6 Ready: Supports IPv6 dual stack to help with migration to IPv6
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Fax Support: Real-time fax over IP via T.38 fax relay and fax pass-through via G.711
Voice Quality & Codecs
The Cisco ATA 191 delivers exceptional voice quality through advanced echo cancellation, noise reduction, and support for multiple audio codecs including G.711 a-law, G.711 µ-law, G.729a, and G.729ab. Full-duplex audio ensures natural two-way conversations without interruption.
Connectivity & Compatibility
The Cisco ATA 191 Multiplatform Analog Telephone Adapter is designed to work with Cisco Webex Calling, BroadCloud and BroadWorks, and other third-party call control system Metaswitch, Asterisk. It supports standard SIP protocols for broad compatibility with most VoIP service providers, and features one 10/100 Mbps Ethernet port for network connectivity.
Compact & Efficient Design
Physical dimensions are 3.9 x 3.9 x 1 in. (100 × 100 × 28 mm) with a weight of 4.7 oz (132.1 g). The compact, wall-mountable design fits seamlessly into any office environment. Power consumption is just 5W with DC input voltage of 5V DC at 2.4A maximum, facilitating energy-efficient green operations.
What's in the Box
- Cisco ATA 191 Multiplatform Analog Telephone Adapter
- AC/DC Power Adapter (100-240VAC at 50-60Hz with 5.91' cord)
- Wall-mount hardware
- Quick Start Guide
Full Specifications
Hardware
| FXS Ports |
2 × RJ-11 FXS ports |
| Network Port |
1 × RJ-45 10/100 Mbps Ethernet port |
| LED Indicators |
Power, Network, Phone 1, Phone 2, PRT |
| Button |
Reset / Problem Reporting (PRT) |
| Mounting |
Wall mountable |
Physical Specifications
| Dimensions (W × D × H) |
100 × 100 × 28 mm (3.9 × 3.9 × 1 in.) |
| Weight |
132.1 g (4.7 oz) |
| Operating Temperature |
0 to 40°C (32 to 104°F) |
| Storage Temperature |
-10 to 60°C (14 to 140°F) |
| Operating Humidity |
10 to 90% (non-condensing) |
| Storage Humidity |
10 to 95% (non-condensing) |
Voice & Audio
| Audio Codecs |
G.711 a-law, G.711 µ-law, G.729a, G.729ab |
| Voice Features |
Full duplex audio, echo cancellation, voice activity detection, comfort noise generation |
| Fax Support |
T.38 fax relay, G.711 fax pass-through |
| DTMF |
In-band, out-of-band (RFC 2833), SIP INFO |
Telephony Features
| Call Features |
Call forwarding, call hold and resume, call waiting, caller ID, call transfer, three-way conferencing, voicemail, do not disturb |
| SIP Configuration |
Two independent SIP registrations |
| Ringer Load |
Maximum 3 RENs (Ringer Equivalence Numbers) |
Network & Protocols
| Network Protocols |
IPv4/IPv6 dual stack, SIP, TCP/UDP, RTP/RTCP, HTTP, HTTPS, ARP, ICMP, LLDP, SNMPv3 |
| Provisioning |
TR-069, XML configuration files, web-based configuration |
| QoS |
IEEE 802.1p/Q tagging (VLAN), Layer 3 TOS, DiffServ |
Security
| Media Security |
SRTP (Secure Real-Time Transfer Protocol) |
| Signaling Security |
SIP over TLS, HTTPS, SSH |
| Encryption |
AES encryption |
Power
| DC Input |
5V DC at 2.4A maximum |
| Power Consumption |
5W |
| AC Adapter |
100-240VAC at 50-60Hz (26-34VA) with 5.91' cord |
Compliance & Safety
| Safety Standards |
UL 60950, CAN/CSA-C22.2 No. 60950, IEC 60950-1 |
| Certifications |
CE Markings per directives 2014/30/EU and 2014/35/EU |
| MTBF |
300,000 hours |
Warranty
| Warranty Period |
1-year limited hardware warranty |
Specifications are sourced from the manufacturer product page and may be updated.
