User's Manual

Table Of Contents
Installation, Operation and Service Manual 90DIB500R41IM_FCC02 99.1 53
DIB-500 R4.1 Product description
Constituents
TETRA Application Platform (TAP)
The TETRA Application Platform (TAP) is a software component and acts as the gate-
way between applications and the ACCESSNET
®
-T IP. The TAP is responsible for log-
ging in/authenticating the relevant applications and connecting them to the wireless
network.
Applications can be integrated into the TAP via the ACCESSNET
®
T Common Applica-
tion Programming Interface (A-CAPI). The TAP forwards the data, processed, to the
core operation server (COS), for example, and thereby establishes the connection
between applications and the radio network. Via the connection with the TAP, the
respective application can be integrated into the ACCESSNET
®
-T IP like a radio sub-
scriber and, e.g., send short message (SDS), establishing and answering calls, etc.
A-CAPI applications connected via the TAP have a larger scope of functions than radio
subscribers such as:
| combining dynamic groups,
| administering dynamic object addresses (OOCA),
| administering dynamic call lines
| monitoring stations
| recording extended time calls (voice recorder).
Examples of A-CAPI applications:
| dispatcher,
| Voice recorder,
| SDS recorder,
| Control workstation
| Object call server.
SIP Media Gateway (SMG)
The SIP Media Gateway (SMG) is a software component and used for connecting SIP-
based private automatic branch exchange (PABX). The SMG converts TETRA-coded
voice data to G.711 and back to facilitate the communication between TETRA subscrib-
ers and private branch exchange subscribers. For the communication with PABX, the
SMG uses the standardised Session Initiation Protocol (SIP). In this function, the SMG
is used as an SIP client.
Hardware Guard (HWG)
The Hardware Guard (HWG) is a software component and is used for monitoring the
IntelPC.
3.1.5.5 Synthesiser
The synthesiser is a hardware component and provides all the required clock pulses
and frequencies. These are based on the standard clock pulse (GPS) provided by the
GPS module of the Multi Server Processor Unit (MSU). The synthesiser is used to gen-
erate and analyse the 1PPS signal (pulses per second, PPS). The synchronisation of
additional TIB transceiver modules of a DIB-500 R4.1 is performed in this way.