Comtech EF Data DTMX5000 SpectraCast - Manual (Page 21)

DTMX5000 IP Gateway Introduction
Rev. 1 1–7
The DTMX5000 contains two QoS parameters for each user:
•
Committed Information Rate
•
Maximum Rate
The committed information rate is the maximum the DTMX5000 will allocate to that
individual subscriber. The maximum rate specifics how the overall rate divides among all
subscribers. If at a certain time free bandwidth is available; the subscribers may or may
not receive more than their maximum rate, depending on the specified QoS mode.
1.3.5 On-the-Fly Configuration
Most of the configuration and maintenance parameters of the DTMX5000 can be
configured without disturbing the flow of data. For example: using the NMS, the user can
set a new CIR for a subscriber, without stopping the flow of data to the subscriber.
1.3.6 Packet Encryption
To provide privacy, the data addressed to individual subscribers is encrypted with the
DES algorithm, implementing the CBC mode.
For additional encryption information, refer to FIPS-46-2 and FIPS-81.
1.3.7 Dual Input NIC
To ensure security and support high availability, the DTMX5000 has two input 10/100
BaseT NICs:
Transportation NIC This NIC does not enable access to the C&M of the
DTMX5000. This NIC can be connected to the unsecured
network, such as the Internet. The DTMX5000 design prevents
hackers from gaining access to the unit from the transportation
NIC.
Control and Management The Control and Management NIC of the DTMX5000 is via
the Telnet, SNMP, and FTP. This NIC is connected to a
secured C&M network. The C&M NIC can also act as an
additional transportation NIC, enabling the sending of the IP
datagrams from the C&M network to the DVB channel.
Note: The DTMX5000 supports full functionality even with only one input NIC. In this
case, the C&M input NIC acts as C&M and Transportation.
Along with security, the two input NICs enable the support the high availability
topologies. High availability will be supported in the next DTMX5000 version.