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Cisco ATA 191 K9 Analog Telephone Adapter

Cisco ATA 191 K9 Analog Telephone Adapter
  • Cisco ATA 191 K9 Analog Telephone Adapter
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  • Product Name:
    Cisco ATA 191 K9 Analog Telephone Adapter
  • Model Number:
  • Brand:
  • Manufacturer Warranty:
    1 Year
  • Description

    Cisco ATA 191 K9 Analog Telephone Adapter

    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.

    Product Overview

    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.



    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


    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


    Enables an IPv4/IPv6 dual stack to help migration to IPv6


    Physical dimensions (H×W×D)

    3.9 x 3.9 x 1 in. (100 × 100 × 28 mm)


    4.7 oz (132.1 g)


    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


    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)


    Secure HTTP (HTTPS)

    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)


    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)


    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


    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)


    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


    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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