The NComm SONET Trunk Management Software
provides a complete software solution for the implementation of a range
of SONET/SDH systems. It consists of a set of software modules that perform
span configuration, alarming, performance monitoring plus Automatic
Protection Switching. The SONET/SDH software is completely data driven, allowing
operating mode, alarm timers, and thresholds to be configurable on a
static or run time basis. Additionally, NComm's SONET/SDH TMS device
driver mapping methodology permits potentially manydevice
drivers to appear as one virtual device to the SONET/SDH
software. The suite includes 2 levels of ANSI-C Application Programming
Interfaces (APIs), encapsulating the details of SONET/SDH operation and
the underlying hardware elements, and provides a clean integration to
the target system's operating environment.
Target Applications
High Bandwidth Data Transport
VT-n - OC-n Multiplexing & De-multiplexing
Main Features
"Off-the-shelf" SONET/SDH interface software providing multiple
levels of functionality based on product application
Supports 1 to N STS-1 spans. Scaling upwards, several STS-1
spans can be multiplexed together to form OC-N's. Scaling downwards,
an STS-1 can be demuxed to up to 7 VT Groups with each group
containing either VT1.5's, VT2's VT3's, or VT6's.
Polymorphic Device Driver Mapping (PDDM) Methodology
allows support for many device drivers.
Provides full SONET/SDH span maintenance and alarming support,
with configurable timers and thresholds for alarm detection,
loopback activation, and other span conditions.
Full support for SONET/SDH Performance Monitoring per T1.231.
Supports user choice of framer, currently supports generic
SONET/SDH framer, as well as driver support for LSI devices. Call
for others.
Runs with or without Real Time Operating System (RTOS) on
virtually any processor and host environment. Currently ported
to LINUX, VxWorks, OSE and Nucleus Plus.
The figure below illustrates the TMS
software module architecture. Each software component performs
specific functions that represent a part of the total SONET/SDH
software solution. The SONET/SDH-Software API is comprised of
a set of ANSI C functions and macros that encapsulate all functionality
and data of the SONET/SDH-Software. The API provides a clean
interface to the SONET/SDH-Software simplifying the integration
of the SONET/SDH-Software to the target application. The target
application is implemented on top of the SONET/SDH-Software API
layer, using the API to access all functionality provided by
the SONET/SDH-Software.
The SONET/SDH Manager Module (SONMM) provide the interface
points for administering and configuring any of the STS-1/OC-n
spans being controlled by the SONET/SDH-Software. The SONMM defines
the line interface rate -
OC-1 thru OC-192, structure of the interface-line, path,
section & virtual tributaries and alarm conditions definable
per type of alarm and per structure of the interface. The SONMM
also communicates with the SONPMM for processing performance
reports.
The SONET/SDH Performance Monitoring
Manager Module (SONPMM) will collect performance data
as specified in ANSI T1.231.
The SONPMM will collect performance statistics for both the near
end and far end of the SONET/SDH Interface. Performance data is
collected for the past 24 hours in 15 minute buckets plus summary
information. In addition, the PMMM supports collections of data
locked to the time of day. The SONPMM supports threshold-crossing
alerts, when enabled, the alerts will inform the application when
a threshold has been exceeded and take the appropriate action.
The application can retrieve performance information upon request
to the SONPMM.
The Device Driver and its associated API provides the interface
between the SONET/SDH-Software and the driver device. Hardware
implementations of OC-n systems and VT-n systems may involve various & mixed
devices that access different sub-levels of an OC or STS signal.
To accommodate this potential, the SONET/SDH Software has a Polymorphic
Device Driver Mapping Methodology that permits many device drivers
to appear as one virtual device to the SONET/SDH Software; this
methodology maintains a commonality in general device driver development.
The SONET/SDH Driver API is comprised of a set of ANSI C functions
and macros that handle the interaction with the device driver.
