Introducing Cisco Small Business Analog Telephone Adapters
Comparison of ATA Devices
Cisco Small Business ATA Administration Guide
17
1
Figure 2 ATA Deployment with Onsite Call Control
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 page 17
•
“ATA Connectivity Requirements,” on page 20
•
“ATA Software Features,” on page 26
Comparison of ATA Devices
Each ATA device is an intelligent low-density Voice over IP (VoIP) gateway that
enables carrier-class residential and business IP Telephony services delivered
over broadband or high-speed Internet connections. An ATA device maintains the
state of each call it terminates and makes the proper reaction to user input events
(such as on/off hook or hook flash). The ATA devices use the Session Initiation
Protocol (SIP) open standard so there is little or no involvement by a “middle-man”
server or media gateway controller. SIP allows interoperation with all ITSPs that
support SIP.
The
ATA Models
table summarizes the ports and features provided by the ATA
devices described in this document.
Linksys ATA
Telephone/
fax
Ethernet
Broadband CPE
(DSL, cable,
fixed wireless)
Broadband
SIP proxy
Layer 3
IP infrastructure
PSTN
Voice
gateway
194487
V
V
V
Optional On-Site
Call Control
(SPA9000 or Legacy PBX)