| Glossary |
|
|
DTMF | Dual Tone |
| DTMF assigns a specific sound frequency, or tone, to each key so that it |
| can easily be identified by a monitoring microprocessor. That frequency |
| is then translated into a usable analog or digital signal. This is commonly |
| known as Touch Tone. |
Ethernet | Ethernet is a particular network topology and protocol, especially useful |
| in LANs. It comes in various speeds and is often regarded as THE current |
| technology for general network direct connection. The current |
| connectivity is generally considered to be |
| the backbone, if one is used, is coaxial cable or Fiber optics. There is also |
| a |
filter | An operating parameter used with routers that can be set to block the |
| transfer of packets from one LAN to another. |
firewall | A system designed to prevent unauthorized access to or from a private |
| network. Firewalls can be implemented in both hardware and software, |
| or a combination of both. Firewalls are frequently used to prevent |
| unauthorized Internet users from accessing private networks connected |
| to the Internet, especially intranets. All messages entering or leaving the |
| intranet pass through the firewall, which examines each message and |
| blocks those that do not meet the specified security criteria. |
frame | A fragment of data that is packaged into a frame format, which comprises |
| a header, payload, and trailer. |
frame relay | A |
| Network (WAN). Frame Relay networks in the U.S. support data transfer |
| rates at T1 (1.544 Mbps) and T3 (45 Mbps) speeds. Most telephone |
| companies now provide Frame Relay service for customers who want |
| connections at 56 Kbps to T1 speeds. However, it is being replaced in |
| some areas by faster technologies, such as ATM. |
gateway | A link from one computer system to a different computer system. |
GMT | Greenwich Mean Time. |
CMG Router - Release 2.7 | Glossary - 3 |
