The Digi DataFire SYNC 2000 adapters provide remote WAN and SNA connectivity for PCI servers, which make them ideal for branch offices of central sites. X.25 is a proven, packet switched technology that has been around for many years. X.25 provides 100 percent error correction and network-managed flow control. It guarantees that every packet will arrive at its destination without any errors. This is a slow, deliberate process that involves a great deal of overhead and is widely used internationally where leased lines are not readily available.
Subscribers pay a variable rate based on connect time and packets transmitted. Frame Relay is designed as the successor to X.25 for transmitting data over the phone network. It is also a packet switching protocol, but it provides no guarantee of data integrity. Frame Relay links have more in common with dedicated lines than switched lines, but the cost can be substantially lower for an equivalent capacity, as subscribers pay a variable rate based on bandwidth and the committed information rate.
The Digi DataFire SYNC 2000 is a family of intelligent synchronous communication adapters that provide advanced server-based Wide Area Network (WAN) solutions. It's available in two- and four-port models. The DataFire SYNC 2000 2P and 4P models are mid-level, intelligent WAN adapters based on the Motorola MPC860 PowerQUICC processor running at 25 MHz and 40 MHz, respectively. All DataFire SYNC 2000 adapters run Frame Relay FRF.9 compression to boost throughput. All DataFire SYNC 2000 models work with PCI-based servers running at either 3.3- or 5-volts. Four MB of on-board RAM supports T1/E1 speeds on all ports in full-duplex mode. Cables are available for the common interfaces - V.24, EIA-530, V.35, V.36, V.11 and EIA-449. Each port uses an optional independent cable, allowing any combination of electrical interfaces to be used. The cable is automatically configured when plugged into the board, eliminating troublesome configuration options. Each port can report the status of all compliant modem signals and attached cables. Each interface also can measure and report the speed of modems and CSU/DSUs for faster troubleshooting.