T1/E1 PRI ISDN Standard Compliant Software
(NA ISDN-2, 5ESS, 4ESS, DMS-100 and Euro-ISDN PRI source code)
NComm’s Primary Rate Integrated Services Digital Network (T1/E1 PRI ISDN & Euro PRI ISDN) protocol stacks brings the same flexibility and portability found in all NComm’s Trunk Management Software offerings. These state of the art offerings are architected for integration with both NComm’s T1 and E1 TMS, and other T1/E1 implementations. NComm’s T1/E1 PRI ISDN software stacks provide the layer 2 Q.921 and layer 3 Q.931 D channel signaling required for T1/E1 PRI network interfaces. All switch types are immediately available inlcuding NISDN-2, 5ESS, 4ESS, DMS100 and Euro-ISDN for both User- and Network-Side PRI. As with all NComm TMS offerings, the T1/E1 PRI ISDN software packages include 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 meets 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.
PRI ISDN Features & Benefits
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.
An HDLC driver is included with the package.