May 31, 2006
New, NSM-50M Offers Increased
Speed, Port Routing, and Modem Support.
General Dynamics C4 Systems is
introducing a new Nodal Satellite Multiplexer that offers increased
speed and improved performance and versatility.
Produced by General Dynamics'
VertexRSI brand, the NSM-50M is a small, lightweight synchronous
time-division multiplexer that provides aggregate interfaces to
satellite modems and group interfaces to terrestrial equipment.
The NSM-50M delivers cost-effective
solutions to satellite communication multiplexing demands. In its
legacy mode, the NSM-50M is interoperable with and functionally
replaces the legacy TD-1377 Tactical Satellite Signal Processor (TSSP).
In its enhanced mode, the NSM-50M is interoperable with MIDAS, GMT
and other Mil-Std 188-168 compliant equipment.
Brent Jones, Sales Manager for
General Dynamics C4 Systems VertexRSI said, "The
new NSM has a number of enhancements and added features that improve
its speed and performance over previous NSM products. We’ve
increased the maximum aggregate port data rate to 52 Mbps and the
maximum group port data rate to 8.448 Mbps."
'fourth generation' NSM offers increased
capability over previous NSM models,"
Jones said. "The addition of two HSSI
ports per EIA-530 standards as well as an HSSI connection on the
aggregate port gives users the flexibility to use higher speed
modems up to 52 Mbps. The unit also has the capability to prioritize
any number of available reference clocks for automatic detection,
lock and fallback which makes it one of the most reliable and
versatile units available," he added.
Full SATCOM Support:
The NSM-50M supports fully connected mesh networks with up to seven
nodes. It multiplexes up to 12 group inputs (selected in any
combination from the 26 ports ) into a single aggregate stream for
transmission providing more efficient use of bandwidth since
guardbands between channels are not required. The unit also features
a digital signal processor that performs frame synchronization
acquisition, maintenance, initialization, configuration, control
telemetry, aggregate error rate monitoring and built-in test
The NSM-50M is packaged in a single rack unit enclosure. Included in
that space-saving framework are:
- One multiplexer with one spare
- Six demultiplexers with one
spare demultiplexer switchover input
- 12 active terrestrial-side
group interfaces with satellite Doppler buffers (selected from
26 available ports), and
- A secure/non-secure voice
orderwire bridge with ring detection and generation
The NSM-50M is managed via an EIA RS-232 or RS-485 port connected to
a personal computer. A user-friendly graphical monitor and control
interface provides extensive diagnostic reporting.