Cisco ATA 191 Panduan Memulai Cepat

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Cisco ATA 191 Analog Telephone Adapter

Overview

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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