Introducing Cisco Small Business Analog Telephone Adapters
ATA Connectivity Requirements
ATA Administration Guide
SPA8000 Connectivity
As shown in the following illustration, the SPA8000 consists of eight voice ports
(voice lines 1-8).
8 FXS (RJ-11/RJ-21 ) ports
Administrative
IVR (Line 1 or
SPA8000
Line 2)
Line 1
Line 2
Line 3
Line 4
Line 5
Line 6
Line 7
Line 8
By default, the device on the AUX 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 AUX port is automatically changed to 192. 1 68. 1 .0.
In the illustration, one fax machine is connected to each pair of ports to illustrate
that only one T.38 connection is supported by each of the four pairs of RJ-11 ports.
Up to four fax machines can be connected to the SPA8000 router, but they must be
distributed as shown.
Ethernet
port
NAT/PAT
Internal DHCP
server
AUX
port
IP Router (with
hairpinning) or
Broadband modem
ISP
LAN
WAN
Administration
PC
1
Internet
IP
IP
ITSP
24