Glossary252 CSX400 and CSX400-DC User’s GuideData Compression — Techniques used to reduce the number of bits transferred across thecommunication links that represent the actual data bits. Compression is used to optimize use ofWAN links and speed data transmission.DHCP — Dynamic Host Configuration Protocol is a protocol for automatic TCP/IP configurationthat provides static and dynamic address allocation and management.Dial on Demand — Dial up WAN resources are accessed only when remote access is requiredand released as soon as the resource is no longer needed.DTE — Data Terminating Equipment. DTE refers to equipment used in a network as the datasource and/or destination, such as computers.DTMF — Dual Tone Multi-Frequency. TOUCHTONE as opposed to Dial Pulse (DP).DTR — Data Terminal Ready. RS232 signal used for indicating to the DCE the readiness totransmit and receive data.EtherTalk — AppleTalk protocols running on Ethernet.Filter — Feature to control the flow of data based on protocol or bridge information. Filters canbe specific to allow data through or prevent transmission.Firewall — A combination of techniques used to protect one network from unknown networksand users on the outside. Firewalls can filter or block traffic and act as a management and networksecurity point where all traffic can be scrutinized.Frame — A group of data generated by Data Link Layer operation.HDSL — High bit rate Digital Subscriber Line. A technology to put two-way T1 on a normalunshielded, bridged (but not loaded) twisted pair without using repeaters.IMUX (Inverse Multiplexing) — The process of splitting a single high-speed channel intomultiple signals, transmitting the multiple signals over multiple facilities operating at a lower ratethan the original signal, and then recombining the separately-transmitted portions into the originalsignal at the original rate.In-Band Signaling — Transmission within the frequency range used for data transmission; i.e.,results in use of bandwidth normally reserved for data.
