Cisco ATA 191 Multiplatform Analog Telephone Adapter (2 port)


  • VERSATILE: IP phone adapter brings traditional analog devices into the IP world
  • AUDIO: Clear, natural-sounding voice quality via advanced preprocessing, high-performance echo cancellation, voice activity detection, and comfort noise generation
  • SECURITY: Supports the latest encryption with Transport Layer Security (TLS), Secure Hash Algorithm (SHA-2) and new Secure Real-time Protocol (sRTP) cipher suites
  • HARDWARE: Two RJ-11 FXS ports and one 10/100 Mbps RJ-45 Ethernet port
  • PEACE OF MIND: 1-year limited hardware warranty

The Cisco ATA 191 Multiplatform 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 ATA 191 is the preferred solution to address the needs of customers who connect to enterprise networks, small offices, or 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 a more affordable and reliable way.

Extend the investment of your analog communications equipment with this ATA 191 2-Port RJ11-to-Ethernet Multiplatform Analog Telephone Adapter from Cisco. This device features two RJ11 and a single RJ45 port, giving you the ability to connect legacy analog equipment to take advantage of IP telephony applications. It’s designed to work with third-party call-control systems and is not compatible with Cisco call-control systems.

The two RJ11 FXS ports can be configured independently as two SIP (Session Initiation Protocol) registrations and offer a variety of features to both enhance voice quality and network compatibility. Built-in audio pre-processing is engineered to offer clear and natural conversations with echo cancellation, voice activity detection, and comfort noise generation. It also enables IPv6 dual-stack for migration to more advanced IPv6 protocol networks.

Enables zero-touch provisioning via TR-069 and XML configuration files
Serviceability is improved with a dedicated PRT button for problem reporting and log collection

Security Features

  • A host of security solutions are features for both media and signaling:
  • Password-protected system reset to factory default
    Password-protected administrator and user access authority
  • Provisioning, configuration, and authentication
  • HTTPS with factory-installed client certificate
  • Advanced Encryption Standard (AES) encryption
  • SIP over Transport Layer Security (TLS1.1 and TLS1.2)
  • Secure (encrypted) calling using Secure RTP (sRTP)
  • Encrypted configuration files
  • Image authentication
  • Secure boot
  • Secure Shell (SSH)

Networking Features & Support

  • 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)
  • HTTP
  • Trivial File Transfer Protocol (TFTP)
  • Address Resolution Protocol (ARP)
  • DNS A/AAAA and SRV records
  • Dynamic Host Configuration Protocol (DHCP) client
  • Internet Control Message Protocol (ICMP)
  • Simple Network Time Protocol (SNTP)
  • Cisco Discovery Protocol
  • Link Layer Discovery Protocol (LLDP)
  • Point-to-Point Protocol over Ethernet (PPPoE)

Quality of Service (QoS) Features

  • IEEE 802.1p/Q (QoS and VLAN tagging)
  • Differentiated Services (DiffServ), Type of Service (ToS)

Telephony Features

  • Anonymous call and call blocking
  • Call forwarding: No answer, busy, and all
  • Call hold and resume
  • Caller ID blocking
  • 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 return, and call back on busy
  • Call waiting
  • Configurable ring frequency
  • Configurable tones and cadences
  • Disconnect tone
  • Distinctive ringing: Calling and called number
  • Do not disturb
  • Forced Authorization Code (FAC)/Client Matter Code (CMC)
  • 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
  • Redial
  • Selective and anonymous call rejection
  • SIP redundancy
  • Speed dial
  • Streaming audio server: Up to 4 sessions
  • Three-way conference calling with local mixing
  • Tip and ring voltage adjustment setting
  • Visual Messaging Waiting Indicator (VMWI) using Frequency Shift Keying (FSK)
  • Network Address Translation (NAT)
  • Session Traversal Utilities for NAT (STUN)
Audio Features
  • Codec: G.711 a-law, G.711 μ-law, G.729a, G.729ab, G.726
  • Codec name assignment
  • Full-duplex audio
  • Echo cancellation
  • Voice activity detection
  • Silence suppression
  • Configurable silence threshold
  • 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 Features
  • 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
  • Automatic negotiation on transmission rate

Provisioning & Management Features

  • Cloud provisioning (remote configuration)
  • Web-based administration
  • Interactive Voice Response (IVR)
  • Automated provisioning and upgrading via HTTP, HTTPS, and TFTP
  • TR-069
  • SSH access
  • Simple Network Management Protocol (SNMPv3)
  • Report generation and event logging
  • Dedicated PRT button
  • Support for RTP statistics
  • Syslog (multilevel granularity)
  • Ping and trace route diagnostics
  • Configuration management: Backup and restore
  • Dual image