Cisco Systems WRP400 Manual Do Utilizador

Comparison of ATA Devices

ATA Administration Guide

17

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 following table summarizes the ports and features provided by the ATA 
devices described in this document.

PAP2T

2

—

1

—

 2

Voice adapter with 
two FXS ports.

SPA2102

2

—

1

 1

2

Voice adapter with 
router.

SPA3102

1

1

1

 1

1

Voice adapter with 
router and PSTN 
connectivity.

SPA8000

8

—

1

Mainte-
nance 
only

8

Voice adapter with 
support for up to 
eight FXS devices. 
Supports SIP 
Trunking for inbound 
call routing to trunk 
groups.

WRP400

2

—

1

4

2

Wireless-G IP router 
with two FXS ports. 
Provides ATA device 
functionality. Can be 
remotely 
provisioned.

WRTP54G

2

—

1

4

2

Wireless-G IP router 
with two FXS ports. 
Provides ATA device 
functionality.