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MSRP: $350.42
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MPN: ATA191-K9
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The Cisco ATA 191 Analog Telephone Adapter is a 2-port handset-to-Ethernet adapter that brings traditional analog telephony devices into the IP world.

The Cisco® ATA 191 Analog Telephone Adapter turns traditional telephone, fax, and overhead paging communications devices into IP devices for greater cost-effectiveness. Customers can take advantage of IP telephony applications by connecting their analog devices to Cisco analog telephone adapters.

The Cisco ATA 191 Analog Telephone Adapter is the preferred solution to address the needs of customers who connect to enterprise networks, small offices, or the emerging unified communications as a service from the cloud. It has two standard FXS ports, which can be configured independently as two Session Initiation Protocol (SIP) registrations. With the ATA 191, customers can protect and extend their existing investment in analog systems, as well as smooth their migration to pure voice over IP in an affordable and reliable way.

The Cisco ATA 191 Analog Telephone Adapter is designed to work with Cisco call control systems.

Features and Benefits
  • Voice Quality: Offers clear, natural-sounding voice quality via advanced preprocessing, high-performance echo cancellation, Voice Activity Detection (VAD), and Comfort Noise Generation (CNG)
  • Central provisioning and configuration: Eases deployment via a Cisco Unified Communications Manager central interface
  • Security: Provides a complete security solution for both media and signaling
  • Problem reporting (PRT): Improves serviceability with a dedicated PRT button for problem reporting and log collection
  • IPv6: Enables an IPv4/IPv6 dual stack to help migration to IPv6
Hardware Interface: Two RJ11 FXS ports, one 10/100 Mbps RJ-45 Ethernet port, power button: reset and PRT
LED indicators: Power, Network, Phone 1, Phone 2, PRT
Wall mountable
Subscriber Line Interface Circuit (SLIC) Ring voltage: 40 to 90 Vpk configurable
Ring frequency accuracy: 1%
Ring waveform: Trapezoidal or sinusoidal
Maximum ringer load: 3 Ringer Equivalence Numbers (RENs)
On-hook voltage (tip and ring): -46 to -56V
Off-hook current: 25mA +/-10%
Terminating impedance: 600 ohm resistive, 900 ohm resistive, or 220 ohm + 820 ohm
120 nF complex impedance
Frequency response: 300 to 3400 Hz
Return loss (600 ohm, 300 to 3400 Hz): up to 26 dB
Idle channel noise: <-65 dBm 0p
Longitudinal balance: 58 dB (typical)
Voice quality Mean Opinion Score (MOS): >4.0
Voice quality jitter: <150ms
Networking MAC address
IPv4 only
IPv6 only
IPv4/IPv6 dual stack
Session Initiation Protocol (SIP)
Transmission Control Protocol (TCP)
User Datagram Protocol (UDP)
Real Time Protocol (RTP)
Real Time Control Protocol (RTCP)
Trivial File Transfer Protocol (TFTP)
Address Resolution Protocol (ARP)
DNS A and AAAA records
Dynamic Host Configuration Protocol (DHCP) client
Internet Control Message Protocol (ICMP)
Simple Network Time Protocol (SNTP)
Cisco Discovery Protocol (CDP)
Link Layer Discovery Protocol (LLDP)
Quality of Service (QoS) IEEE 802.1p/Q (QoS and VLAN tagging)
Differentiated Services (DiffServ) / Type of Service (ToS)
Telephony Call forwarding: No answer, busy, and all
Call hold and resume
Caller ID generation (name and number): Bellcore, BT, and European Telecommunications Standards Institute (ETSI)
Caller ID with name and number
Call pickup and group pickup
Call transfer
Call waiting
Configurable ring frequency
Country-specific tones and cadences
Disconnect tone
Distinctive ringing: Calling and called number
Forced Authorization Code (FAC)/Client Matter Code (CMC)
Failover and fall back
Flash hook timer
Hook flash event signaling
Hotline and warm line calling
Message Waiting Indicator (MWI) tones
Music on hold
Off-hook warning tone
Polarity control
Share lines
Speed dial
Tip and ring voltage adjustment setting
Visual Messaging Waiting Indicator (VMWI) using Frequency Shift Keying (FSK)
Audio Codec: G.711 a-law, G.711 μ-law, G.729a, G.729ab
Full duplex audio
Echo cancellation
Voice activity detection
Silence suppression
Comfort noise generation
Adaptive jitter buffer
Frame loss concealment
Adjustable audio frames per packet
Call progress tone generation
Impedance and gain adjustment
Dynamic audio payload
Fax and modem Real-time fax over IP via T.38 fax relay (Group 3)
Fax pass-through via G.711 (Group 3)
Fax tone detection and pass-through
Auto negotiation on transmission rate
Provisioning and management Central configuration
Interactive Voice Response (IVR)
Automated provisioning and upgrading via HTTP and TFTP
SSH access
Nonintrusive, in-service upgrades
Report generation and event logging
Dedicate PRT button
Support RTP statistics
Syslog (multilevel granularity)
Dual image
Security System reset to factory default
Password-protected administrator access authority
Provisioning, configuration, and authentication
HTTPS with factory-installed client certificate
Advanced Encryption Standard (AES) encryption
SIP over Transport Layer Security (TLS) 1.1 and 1.2
Secure (encrypted) calling using Secure RTP (sRTP)
Encrypted TFTP configuration files
Image authentication
Secure boot
Secure Shell (SSH)
Power DC input voltage: 5V DC at 2.0A maximum
Power consumption: 5W
Switching type (100 to 240V) automatic
Power adapter: 100 to 240V and 50 to 60 Hz (26 to 34 VA) AC input, with 6-ft (1.8-m) cord
Reliability Mean Time Between Failures (MTBF): 300,000 hours
Operating temperature: 32° to 104°F (0° to 40°C)
Nonoperating temperature: 14° to 140°F (-10° to 60°C)
Humidity: Operating 10% to 90%, noncondensing; nonoperating 10% to 95%, noncondensing
Compliance (regulatory) CE markings per directives 2014/30/EU and 2014/35/EU
Compliance (safety) UL 60950 Second Edition
CAN/CSA-C22.2 No. 60950 Second Edition
IEC 60950-1:2005 (Second Edition) + A1:2009 + A2:2013 and/or AS/NZS 60950.1:2015
Compliance (EMC) AS/NZS CISPR 32:2015 Class B
CISPR 32: 2015 Class B
EN 55032: 2015 Class B
EN 61000-3-2: 2014 Class A
EN 61000-3-3: 2013
EN 55024:2010+A1: 2015
EN 61000-4-2: 2009
EN 61000-4-3: 2006+A1:2008+A2:2010
EN 61000-4-4: 2012
EN 61000-4-5: 2014
EN 61000-4-6: 2014+AC2015
EN 61000-4-8: 2010
EN 61000-4-11: 2004
FCC Part 15, Subpart B
ANSI C63.4-2014
ICES-003 Issue 6: 2016
ANSI C63.4-2014
CISPR 32: 2015 class B

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