Cisco Small Business Pro SPA3102 Administration Manual page 20

Introducing Cisco Small Business Analog Telephone Adapters
Comparison of ATA Devices
NOTE
ATA Administration Guide
The information contained in this guide is not a warranty from Cisco. Customers
planning to use ATA devices in a VoIP service deployment are advised to test all
functionality they plan to support before putting the ATA device in service. By
implementing ATA devices with the SIP protocol, intelligent endpoints at the edges
of a network perform the bulk of the call processing. This allows the deployment of
a large network with thousands of subscribers without complicated, expensive
servers.
The following figure illustrates how the different ATA devices provide voice
connectivity in a VoIP network.
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