Introducing Cisco Small Business Analog Telephone Adapters
ATA Connectivity Requirements
NOTE
ATA Administration Guide
SPA2102 Connectivity
As shown in the following illustration, the SPA2102 has two FXS ports (voice lines
1 and 2).
Administrative
IVR (Line 1 or
Line 2)
Line 1
Line 2
SPA2102
By default, the device attached to the LAN port is assigned the network address
192. 1 68.0.0 with a subnet mask of 255.255.255.0. If there is a network address
conflict with a device on the Ethernet port, the network address of the device on
the LAN port is automatically changed to 192. 1 68. 1 .0.
•
The IVR functions are accessed by connecting an analog telephone to Line 1.
•
For proper operation, the service provider should use an Outbound Proxy to
forward all voice traffic when the SPA2102 is located behind a router. If
necessary, explicit port ranges can be specified for SIP and RTP.
IP Router (with
hairpinning) or
Broadband modem
Ethernet
port
LAN
LAN
port
1
Internet
ISP
WAN
IP
IP
ITSP
Administration
PC
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