User's Manual

13
To use the Cordless Gateway in this configuration, you need a high-speed
Internet account with an Internet Service Provider (ISP) and one of the
following pieces of equipment:
❑ An external cable modem;
❑ An external xDSL device, such as an ADSL modem;
❑ An ISDN router; or
❑ Any other external Ethernet device that can provide high-speed
Internet access to a network.
Note that these devices must be external, stand-alone units that support 10
Mbps Ethernet and have an RJ-45 10BaseT connector; devices which use a
different networking technology, such as ATMF-25, will not communicate
with the Cordless Gateway. For a similar reason, most ISDN terminal
adapters cannot be used with the Cordless Gateway because they do not
communicate over Ethernet and do not have a 10BaseT Ethernet port.
Generally, you will use the 10BaseT crossover cable, included in the product
package, to connect the Cordless Gateway to your high-speed device.
Devices such as an ISDN router, which often include several hub ports built-
in, or a cable modem, which is designed to connect to a single Ethernet card
installed in a computer, are wired like a 10BaseT cabling hub. The Cordless
Gateway is also wired like a 10BaseT cabling hub, so in order to connect two
devices that are both wired like a hub together, you must use a 10BaseT
crossover cable. If your high-speed device is wired like a standard Ethernet
card, then you need to use a standard 10BaseT cable to connect the Cordless
Gateway and this device. See Appendix A for more information on the
Cordless Gateway’s cabling requirements.
In this configuration, the Cordless Gateway performs a function known as
“Network Address Translation” or “NAT.” The ISP assigns a single IP
Address for the Cordless Gateway, and NAT allows up to ten (10) Symphony-
enabled computers to access the Internet at the same time using this single
address assignment. The Cordless Gateway acts as an intermediary and sends
data between the Internet and the computers on the Symphony Cordless
Network.