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Introducing Cisco Small Business Analog Telephone Adapters
Comparison of ATA Devices
ATA Administration Guide 19
1
Figure 1 How ATAs Provide Voice Connectivity
• The SPA3102 and SPA8000 act as SIP-PSTN gateways. They provide PSTN
connectivity in addition to a single FXS port.
• The WRP400 and WRTP54G routers provide ports for analog telephone
devices and provide QoS in the form of priority packet queueing.
SPA3102
Broadband
router
Broadband
router
SPA8000,
PAP2T
DSL/cable
modem
WRP400,
WRTP54G,
and SPA2102
Ethernet/Wireless
LAN
Fax (up to 4
SPA8000)
Analog phone
(up to 8 with
SPA8000)
PSTN
Ethernet/Wired
LAN
Internet
187255-revised