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Cisco ATA 191 Quick Start Manual

Analog telephone adapter
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Cisco ATA 191 Analog Telephone Adapter
Overview
•
Your Analog Telephone Adapter
The ATA 191 analog telephone adapter is a telephony-device-to-Ethernet adapter that allows regular analog
phones to operate on IP-based telephony networks. The ATA 191 supports two voice ports, each with an
independent phone number. The ATA 191 also has an RJ-45 10/100BASE-T data port.
Figure 1: Cisco Analog Telephone Adapter
Session Initiation Protocol
Session Initiation Protocol (SIP) is the Internet Engineering Task Force (IETF) standard for real-time calls
and conferencing over Internet Protocol (IP). SIP is an ASCII-based, application-layer control protocol (defined
in RFC3261). It is used to establish, maintain, and terminate multimedia sessions or calls between two or
more endpoints.
Like other Voice over IP (VoIP) protocols, SIP is designed to address the functions of signaling and session
management within a packet telephony network. Signaling allows call information to be carried across network
boundaries. Session management is used to control the attributes of an end-to-end call.
Your Analog Telephone Adapter, on page 1
Cisco ATA 191 Analog Telephone Adapter Overview
1

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Summary of Contents for Cisco ATA 191

  • Page 1 The ATA 191 analog telephone adapter is a telephony-device-to-Ethernet adapter that allows regular analog phones to operate on IP-based telephony networks. The ATA 191 supports two voice ports, each with an independent phone number. The ATA 191 also has an RJ-45 10/100BASE-T data port.

  • Page 2: Sip Capabilities

    Cisco ATA 191 Analog Telephone Adapter Overview SIP Capabilities Note SIP for the ATA 191 is compliant with RFC2543. SIP Capabilities Session Initiation Protocol (SIP) provides these capabilities: • Determines the availability of the target endpoint. If the target endpoint is unavailable, SIP determines whether the called party is already on the phone or didn't answer in the allotted number of rings.
  • Page 3 LAN side and the switched-circuit network side. • Phones—Can act as either a UAS or UAC. The ATA 191 can initiate SIP requests and respond to requests. SIP Servers SIP servers include: •...

  • Page 4: Cisco Ata 191 Hardware

    Cisco ATA 191 Analog Telephone Adapter Overview Cisco ATA 191 Hardware Cisco ATA 191 Hardware The ATA 191 and ATA 192 are compact, easy to install devices. The unit provides these connectors: • 5V DC power connector. • Two RJ-11 FXS (Foreign Exchange Station) ports—Your ATA has two RJ-11 ports that work with any standard analog phone device.
  • Page 5 Cisco ATA 191 Analog Telephone Adapter Overview ATA 191 Top Panel Table 1: ATA 191 Top Panel Items Item Description Power LED Steady green: System booted up successfully and is ready for use. Slow flashing green: System is booting up.

  • Page 6: Ata 191 Back Panel

    Cisco ATA 191 Analog Telephone Adapter Overview Problem Report Tool Button Problem Report Tool Button The Problem Report Tool (PRT) button is on the ATA top panel. Press the PRT button, and a log file is prepared and uploaded to the server for troubleshooting your network.

  • Page 7: Software Features

    Description DC 5V POWER Use the provided power adapter to connect to a power source. Software Features The ATA 191 supports these protocols, services, and methods: • Secure Real-Time Transport Protocol, on page 7 • Fax Passthrough, on page 7 •...

  • Page 8: Supported Voice Codecs

    Cisco ATA 191 Analog Telephone Adapter Overview Supported Voice Codecs established to switch from voice mode to T.38 mode. Cisco Unified Communications Administration allows you to configure a SIP profile that supports T.38 fax communication. The ATA 191 only supports T38 Fax Relay Version 0 (G3).

  • Page 9: Supported Call Services

    Supported Call Services The following call services are supported on the ATA: • IP address assignment—DHCP-provided or statically configured • ATA 191 configuration by Cisco Unified Communications Manager configuration interface • VLAN configuration • Cisco Discovery Protocol (CDP) • Low-bit-rate codec selection •...

  • Page 10: Modem Standards

    • V.22 • V.23 Fax Services The ATA 191 supports two modes of fax services: • Fax pass-through mode: Receiver-side Called Station Identification (CED) tone detection with automatic G.711A-law or G.711µ-law switching. • T.38 Fax Relay mode: The T.38 fax relay feature enables devices to use fax machines to send files over the IP network.

  • Page 11: Supported Methods

    Cisco ATA 191 Analog Telephone Adapter Overview Supported Methods Supported Methods The ATA 191 supports these methods: • REGISTER • REFER • INVITE • BYE • CANCEL • NOTIFY • OPTIONS • ACK • SUBSCRIBE For more information, see RFC3261, SIP: Session Initiation Protocol.

  • Page 12: Installation And Configuration Overview

    3. Install and configure the other network devices. 4. Install the ATA but do not power it up yet. 5. Power up the ATA. Related Topics Prepare to Install the ATA 191 on Your Network Install the ATA 191 Cisco ATA 191 Analog Telephone Adapter Overview...

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