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Introducing Cisco Small Business Analog Telephone Adapters
ATA Connectivity Requirements
ATA Administration Guide 23
1
SPA3102 Connectivity
As shown in the following figure, the SPA3102 has one FXS port (voice line 1).
By default, the device on the LAN port is assigned the network address
192.168.0.0 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 192.168.1.0.
NOTE
• 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 SPA3102 is located behind a router. If
necessary, explicit port ranges can be specified for SIP and RTP.
Line 1
PSTN
Line 1
Internet
IP Router (with
hairpinning) or
Broadband mode
m
ITSP
ISP
SPA
3102
Ethernet
port
LAN
port
LAN WAN
Administrative
IVR (Line 1 or
Line 2)
IP
IP
Administration
PC
187259
PSTN