Datatek DT-4180 - Manual (Page 8)

9 4 8 0 , 4 1 8 0 , 4 2 8 0 , 4 2 8 4 4 0 0 0 X A U s e r M a n u a l
04/09/09
8
2 I N T R O D U C T I O N
The 9480, 4180, 4000XA, 4284, and 4280 are Multiple Protocol Inter-Networking
devices. In this document, the term xxxx or unit will mean any of these devices.
The 4000XA, 4180, 4280, 9480, and 4284 include optional enhanced vertical service
feature packages such as X.25 mediation in various capacities. The 9480 and 4284 also
support the E2A Bridge Network emulation feature package. Other feature packages are
similarly available.
The 4000XA and 4180 support a Time Slot Router (TSR) port. The TSR port allows
transport of proprietary protocols on DS0s, or aggregated on a DS1. The T1, E1, and J1
formats are all supported.
The 4000XA and 4180 support an IP-GATE LAN interface for providing a VPN service
with disjoint addressing. The IP-GATE port provides access to a secure and reliable
virtual private network separate from the other functions of the 4180. It provides an inter-
LAN networking connection over an IP network that would otherwise not be secure
enough to carry this traffic. This provides complete connectivity with any remote IP-
GATE via an IP network. Many hardware variations support an IP-GATE. For example, a
2020
1 + SAM + IP-GATE combination provides such a connection. Similarly, IP-GATE
ports on two 4180s can communicate with each other over an IP network. An IP-GATE
resident on a BNS network may be used as a peer by interfacing through the Universal
Mediation Interface (UMI) Module. If it is desirable to provide access to a LAN in a
central site from a large number of remote sites, the IP-GATE port on the main-site 4180
can be configured to interconnect with the IP-FANOUT application on a 6xxx
Embedded Network Processor located anywhere on the IP network. Please see the
Solution Document “Secure and Reliable Intranet Access For Remote Sites” for a more
detailed discussion of this use of the IP-FANOUT application on the 6xxx.
The 9480 is a single port device, the 4284 has 4 serial ports, the 4000XA and 4180 each
have 16 serial ports, and the 4280 has 32 serial ports. All of the serial ports are
synchronous, or asynchronous that support speeds up to 115.2kbps. Popular protocols
such as Asynchronous, various Bi-Synchronous variants, HDLC, SDLC, X.25, and E2A
are all supported interchangeably on a per-port basis.
In addition, vertical services typically found on Embedded Network processors have
been incorporated into the devices as feature packages. For example, this allows for the
direct mediation of X.25 to individual circuits over TCP connections when the X.25
vertical service is selected on a port. The 9480 and 4284 devices also allow the
emulation of the E2A Bridge network when the
E2AHOB vertical service is selected on a
port.
1
The 2020 is a stand-alone unit, which interfaces an existing SAM to an IP network
instead of a BNS network. This gives IP network access to devices connected to the
SAM ports without any re-cabling.