Comparison Of Ata Devices - Cisco SPA2102-AN - Single Port Router Administration Manual

Introducing Cisco Small Business Analog Telephone Adapters

Comparison of ATA Devices

Comparison of ATA Devices
Cisco Small Business ATA Administration Guide
Figure 2 ATA Deployment with Onsite Call Control
Optional On-Site
(SPA9000 or Legacy PBX)
Telephone/
V
fax
Linksys ATA
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
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.
Call Control
Ethernet
Broadband CPE
(DSL, cable,
fixed wireless)
Layer 3
IP infrastructure
Broadband
SIP proxy
1
Voice
gateway
PSTN
V
V
17