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T1/E1
PRI ISDN Standard Compliant Source Code
(NISDN-2, 5ESS, 4ESS, DMS100 and Euro-ISDN)
NComm’s
Primary Rate Integrated Services Digital Network (T1/E1 PRI ISDN) protocol
stack brings the same flexibility and portability found in NComm’s
Trunk Management Software. This updated package is architected for
integration with both NComm’s T1 TMS and other T1/E1 implementations.
The first switch-type supported are NISDN-2, 5ESS, 4ESS, DMS100
and Euro-ISDN, user side. NComm’s
T1/E1 PRI ISDN software stac provides
the layer 2 Q.921 and layer 3 Q.931 D channel signaling required
for T1/E1
PRI network interfaces. Both User- and Network-Side PRI
are supported. As with all NComm TMS offerings, the T1/E1
PRI ISDN software
package includes easy to use APIs for all communications between
the package and other parts of the customers system. Clear design
guidelines are included for various system design choices and hardware
architectures yielding both very fast project completion while
maximizing engineering flexibility.
General
PRI ISDN Software Overview
NComm’s
Primary Rate ISDN package provides a complete and completed
software solution for the implementation of NI-2, 5ESS, 4ESS,
DMS100 and Euro-ISDN PRI ISDN on the User (Customer Premise
Equipment) and Network side of the network. It will meet
SR-NWT-002343 (Issue 1, June 1993) with regard to all overhead
functions establishing and controlling circuit and packet
mode PRI. Not including in this implementation are packet
protocols used within the data channels (e.g. X.25), V.110/V.120
rate adaptation and related
dedicated services.
Layer 1 Description
For Layer 1 implementation, NComm offers its well known T1 Trunk Management
software (TMS) for a complete T1 PRI ISDN solution.
TMS is complete in providing full standard compliant T1 including alarms
per T1.2321 and
maintenance per T1.231 as well as TR-54016. This software is RTOS, processor
and framer
independent, and pre-integrates with the Layer 2/3 software.
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PRI
ISDN Features & Benefits
- NComm's
PRI ISDN software accommodates a wide variety of hardware
configurations
- D channel
signaling may be run on selected DS0 channels of any
T1 span
- Works
with any Real Time Operating
System including Linux, and processors including multiprocessor environments
- The package
provides a complete implementation of LAP-D and well
defined APIs that greatly reduce the inherent complexity
of a PRI ISDN implementation
- Produces
a complete, standard compliant PRI Network- or User-Side
interface
- All source
code provided is ANSI-C making any required or desired
customizations easy to complete
- Accommodates
a wide variety of hardware configurations
- NComm’s
PRI ISDN is pre-integrated with NComm’s T1 TMS
even further reducing project engineering time.
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PRI ISDN Layer
2 Description
The
PRI ISDN sotware complies with recommendation Q.921,
the Layer 2 software module implements Link Access
Procedures for D-Channel (LapD).
PRI ISDN
Layer 3 Description
NComm’s PRI ISDN Q.931 Layer 3 module software implements the Protocol
Control portions of the layer 3 as defined in the Q.931 recommendation
and ETSI EN 300 403. The Call Control software module, one of the Layer
3 Protocol Modules, implements B-Channel management and Q.931 message
and information element parsing and validation for National ISDN-2 and
Euro-ISDN switch types. Multiple PRI circuits can run and be controlled
with a single NComm PRI ISDN stack.
HDLC Driver
An HDLC driver is
included with the package.
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