4 Access reference configuration

07.013GPPGeneral on Terminal Adaptation Functions (TAF) for Mobile Stations (MS)TS

Figure 1 presents the reference configuration for access to a GSM PLMN (see GSM 04.02).

MS

:<────────────────────────────────────>:

: ┌───────┐ : ┌───────────┐

: │ MT0 ├──┼──┤ BSS/MSC │

: └───────┘ : └───────────┘

: ┌───────┐ ┌───────┐ : ┌───────────┐

: │ TE1 ├──┼──┤ MT1 ├──┼──┤ BSS/MSC │

: └───────┘ : └───────┘ : └───────────┘

┌───────┐ ┌───────┐ : ┌───────┐ : ┌───────────┐

│ TE2 ├──┼──┤ TA ├──┼──┤ MT1 ├──┼──┤ BSS/MSC │

└───────┘ : └───────┘ : └───────┘ : └───────────┘

┌───────┐ : : ┌───────┐ : ┌───────────┐

│ TE2 ├──┼────────────────┤ MT2 ├──┼──┤ BSS/MSC │

└───────┘ : : └───────┘ : └───────────┘

: : :

R S Um

─┼─ = reference point

TE1 = ISDN terminal

TE2 = V- or X-type terminal

TA = Terminal Adaptor

BSS = Base Station System

MSC = Mobile Switching Centre

Figure 1: GSM PLMN Access Reference Configuration

Within the scope of this TS the Mobile Termination MT0 means a fully integrated MS including data terminal and its adaptation functions. MT1 includes ISDN terminal adaptation functions and MT2 includes CCITT V- or X-series terminal adaptation functions among other MT functions.