The GPRS Abis/BTS server allows to simulate a suite of BTSs and to generate a mobile population with two software modules in conformity with the test purpose.
The first module includes only the RLC/MAC protocol layer and a simulation/test function of the user data, which works at an higher protocol layer. This module can communicate with an S4 module that works as the Gb interface.
The second module completes the protocol stack with the LLC and SNDCP protocol layers and includes a simulation/test module of the user data which operates at IP level.
The functional decomposition of the protocol stack and the service of the layers' primitives is implemented in conformity with the GSM technical specifiations together with some extentions related to particular system test requirements. For this model the client application must manage the Mobility Management, the Session Management and theGSMS functions, and it must synchronise the simulation/test functions of the user data on the LSU+.

For this application the minimum configuration includes: 

• Line Server Unit Plus; 
• GPRS Gb BSC Simulation Base Module (Frame Relay, NS, BSSGP)

Optional:
• GPRS Gb BSC Simulation Extension Module (LLC, SNDCP)

• Up to 8192 Kb/s of the global bandwidth.
• Up to 16 PCM interfaces.
• Multiple NSEI supported.
• Concurrent logging of the signalling link.

• Line Server Unit Plus; 
• GPRS Gb SGSN Simulation Base Module (Frame Relay, NS, BSSGP)

Optional:
• GPRS Gb SGSN Simulation Extension Module (LLC, SNDCP)

For this application the minimum configuration includes: 

• Line Server Unit Plus; 
• GPRS Abis BTS/MS Simulation PCU Frames
• GPRS Abis BTS/MS Simulation RLC/MAC Module
• GPRS Gb SGSN Simulation Base Module (Frame Relay, NS, BSSGP)
• UDG User
• UDG Net

For this application the minimum configuration includes: 

• Line Server Unit Plus; 
• GPRS Abis BTS/MS SImulation PCU Frames
• GPRS Abis BTS/MS SImulation RLC/MAC Module
• GPRS Abis BTS/MS Simulation LLC, SNDCP Module
• GPRS Gi IP Interface Simulation Module
• UDG Net

The GPRS MS Manager  manages operation of mobiles through scripts per group basis and collects the test results.
The GPRS Gi Manager  collects results of the tests from the Gi Interface point of view.

For this application the minimum configuration includes: 

• Line Server Unit Plus; 
• GPRS Gi IP Interface Simulation Module
• UDG User
• UDG Net
• Mobile Commander Module

For this application the minimum configuration includes: 

• Line Server Unit Plus; 
• GPRS Abis BTS/MS Simulation PCU Frames
• GPRS Abis BTS/MS Simulation RLC/MAC Module
• GPRS Abis BTS/MS Simulation LLC, SNDCP Module
• GPRS Gi IP Interface Simulation Module
• UDG User
• UDG Net
• Mobile Commander Module