Cisco Systems WRP400 Telephone Accessories User Manual


 
Introducing Cisco Small Business Analog Telephone Adapters
ATA Connectivity Requirements
ATA Administration Guide 22
1
SPA2102 Connectivity
As shown in the following illustration, the SPA2102 has two FXS ports (voice lines
1 and 2).
By default, the device attached to 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 SPA2102 is located behind a router. If
necessary, explicit port ranges can be specified for SIP and RTP.
Line 1
Line 2
Internet
IP Router (with
hairpinning) or
Broadband mode
m
ITSP
ISP
SPA
2102
LAN
WAN
Ethernet
port
LAN
port
Administrative
IVR (Line 1 or
Line 2)
IP
IP
Administration
PC
187257