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Cisco Small Business Analog Telephone Adapters Administration

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1 Introducing Cisco Small Business Analog Telephone Adapters ATA Connectivity Requirements SPA8000 Connectivity As shown in the following illustration, the SPA8000 consists of eight voice ports (voice lines 1-8). Administrative IVR (Line 1 or Line 2) 8 FXS (RJ-11/RJ-21 ) ports IP Router (with hairpinning) or Broadband modem SPA8000 NAT/PAT Internal DHCP Line 2 server Line 1 Ethernet port ISP LAN Internet WAN IP AUX port ITSP Line 3 Administration PC Line 4 Line 5 Line 6 Line 8 187256 Line 7 By default, the device on the AUX 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 AUX port is automatically changed to 192.168.1.0. 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. Cisco Small Business ATA Administration Guide 18