Understanding Voice Port Operations; Ata Voice Features - Cisco SPA112 Administration Manual

Configuring Voice
Getting Started with Voice Services
Cisco SPA100 Series Phone Adapters Administration Guide

Understanding Voice Port Operations

The ATA allows calls to be made from locally connected analog handsets or fax
machines by using SIP-based Internet phone services.
Telephone/fax
The ATA maintains the state of each call made through the PHONE port and makes
the proper reaction to user input events (such as on/off hook or hook flash)
Because the ATA uses the Session Initiation Protocol (SIP), it is compatible with
most Internet Telephony Service Provider (ITSP) offerings.

ATA Voice Features

The ATA is equipped with fully featured, programmable voice ports that can be
custom provisioned within a wide range of configuration parameters. The
following sections describe the factors that contribute to voice quality:
• Supported Codecs
• SIP Proxy Redundancy
• Other ATA Voice Features
Ethernet
V V
Services
Ready
Platform
Voice
gateway
Internet
Service Provider
V V V
VoIP Infrastructure
IP
SIP proxy
4
PSTN
Phone
35