Datatek DT-4180 - Manual (Page 9)

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
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The xxxx is an internet protocol (IP) access device. That is, it mediates any of the
supported protocols and the IP protocol suite. This includes IP, TCP, Telnet, RTP, ARP,
SNMP, etc.
The 4000XA, 4180, 4280, 4284, and 9480 hardware is each individually unique, but
comparable to the 4000. The 4000XA hardware is identical to the 4000 as it is an in situ
software conversion. The notable differences are power options, number of ports, serial
port type, and the 10BaseT vs 10/100 LAN connection for IP connectivity. The xxxx
series provide expanded or additional feature packages.
The 4280 allows 48VDC, nominal 24VDC (18-72V), or AC via a power cube. In addition,
the 4280 may be supplied by Power over Ethernet (POE) on the LAN port thereby
eliminating any power connection.
The 9480, and 4284 hardware are similar to the 4280 except the power options are
48VDC nominal, Power over Ethernet (POE), or AC via the power cube. Notably
missing is the nominal 24VDC (18-72V) power option present on the 4280.
The 4180 allows 48VDC (18-72V), 5VDC, or AC via a power cube. The 4180 does not
support Power over Ethernet(POE).
2.1 CLOSED USER GROUPS
This is an important feature for protecting sensitive endpoints in a corporate-wide
network without the burden of special “security servers”. The xxxx provides security with
an implementation of Closed User Group (CUG) membership and calling security. This
is a capability similar to that provided in X.25 networks but now available for an IP
infrastructure. A closed user group restricts access between xxxx ports and domains or
individual endpoints in the IP network. No external security systems of any kind are
required. A CUG application example is presented at the end of this manual.
2.2 HUNT GROUPS
A Hunt Group is a set of ports arranged to receive calls to a common address. The xxxx
provides this capability for user ports configured to receive calls from the IP network.
2.3 DNS FEATURES
The xxxx can maintain a set of mnemonic host names, analogous to the /etc/hosts file
on both UNIX and Microsoft Windows platforms. This allows the xxxx to perform a
translation between a user-provided name and its associated IP address and TCP port
number. (The use of a mnemonic name is optional, as the xxxx will always accept an IP
address in its numeric form.) The xxxx also allows for the definition of an external
Domain Name Server (DNS) to be used for mnemonic addresses not defined in the host
table. Multiple Domain Name Servers are supported. They are searched in priority order.
2.4 TACACS+ RADIUS LOGIN Support
The xxxx supports up to two TACACS+ RADIUS servers for login authentication. These
are a primary, and a secondary, although each is individually enabled. The TACACS+
support is for either encrypted, or clear authorization. Encryption keys may contain
spaces.