SiGnet DAS3000 IP Access Server
- Provides full Internet connectivity
- Up to 16 access ports per server
- Maximum 28.8kB/s modem to modem speed
- Maximum 115kB/s port to modem speed
- Overall throughput increased by data compression
- Most frequently used point to point protocols (PPP and SLIP) supported
- Address space usage optimized
- Set of available internet services determined by client environment
- Operates like UNIX host
- Low Cost / High Performance Solution
Traditional modem communications software provides two main features:
remote logging based on terminal emulation and file transfer using some simple
transport protocol (kermit or zmodem, for example).
Ei SiGraf's SiGnet DAS3000 IP Access Server
represents such an advanced solution. It is primarily used to
connect remote client environments (personal computers or isolated autonomous
systems) to a wider IP based network environment, as it is shown
in the figure below. Access point is formed by dial-in lines with PPP or SLIP
in base. There is no need for leased lines or special
communication equipment. Having in mind that dial-in connections are dynamic
and temporary, one may conclude that the whole concept is most suitable and
economic for small scale networks' integration into WAN environment.
Once the connection between the client host and server is established,
the information of new environment presence is propagated through the server
network, as fast as possible, so the client host, end consequently the whole
client environment, become reachable. The hosts from both environments can
communicate as the client environment is permanently connected to the network.
Usage of all internet services like mail, remote login, file transfer,
X applications, WWW ..., is possible in two way fashion (from and to the
client network). In fact, the set of available internet services is limited
only by the abilities of client environment. Simply, client host and access
server operate like two remote routers but less expensive lines are used.
Access Server employs dynamic address assignment strategy. Internet
address of unused server port will be assigned to the client host, but the
domain and host name of client host are unchanged so it could be identified
by its own unique name. Hence, number of reserved IP host addresses used by
access server is equal to the maximum number of possible simultaneous links,
i.e. the number of access ports.
IP Access Server runs as a UNIX server so it is easy to configure
and administer it.
LAN Interface IEEE 802.3 AUI, 10BaseT or Twisted Pair Connectors
Serial Interface Multiport serial controller
Dimensions 42.5 x 38 x 7.2 cm ( W x D x H )
Power 110/230 Volts, 0.5Amps, 45 Watts
Environmental Operating Temperature: 10 o to 40 o C
Humidity: Up to 90% (non condensing)
System Configuration - Main board
- Ethernet Controller
- Boot disk
OPTIONS
- 4, 8 or 16 Access Ports
Features