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ATA Administration Guide 16
Introducing Cisco Small Business Analog
Telephone Adapters
This guide describes the administration and use of Cisco Small Business analog
telephone adapters (ATAs). These ATA devices are a key element in the end-to-
end IP Telephony solution. An ATA device provides user access to Internet phone
services through one or more standard telephone RJ-11 phone ports using
standard analog telephone equipment. The ATA device connects to a wide area IP
network, such as the Internet, through a broadband (DSL or cable) modem or
router.
This chapter introduces the functionality of the ATA devices and describes the
features that are available.
Refer to the following topics:
• “Comparison of ATA Devices,” on page17
• “ATA Connectivity Requirements,” on page 20
• “ATA Software Features,” on page 25
Linksys ATA
Telephone/fax
Ethernet
Broadband CPE
(DSL, cable,
fixed wireless)
Broadband
SIP proxy
Layer 3
IP infrastructure
PSTN
Voice
gateway
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