4 Physical Realisation

04.023GPPGSM Public Land Mobile Network (PLMN) Access Reference ConfigurationTS

In a GSM PLMN, the reference point Um is a GSM interface point, i.e. it is always implemented as a physical interface (according to GSM Technical Specifications in the 04 and 05 series). The reference points S and R may be optionally implemented as physical interfaces. The implementation of interfaces at these reference points is according to Technical Specifications GSM 07.01, 07.02 and 07.03.

Figure 2 gives examples of configurations illustrating combinations of physical interfaces at reference points R and S. The examples shown are not exhaustive, but only serve to illustrate possible implementations of the respective functional blocks.

Example (a) of figure 2 illustrates a fully integrated MS including data terminal functions within the mobile station equipment.

Example (b) of figure 2 illustrates the connection of a TE1 in accordance with Technical Specifications GSM 07.02/07.03 (and CCITT Recommendation I.420). In this example the speech service is offered via the TE1.

Example (c) of figure 2 illustrates the connection of a TE2 by a CCITT X or V series interface according to Technical Specifications GSM 07.02 and 07.03.

Example (d) of figure 2 illustrates the connection of a MT2 PCMCIA card to a TE2 by a PCMCIA 2.1 interface according to the Technical Specifications GSM 07.02 and 07.03.

Example (e) of figure 2 illustrates the connection of a TE2 by means of an ISDN TA to the MT equipment.

Example (f) of figure 2 illustrates the connection of a speech only MS.

+———————+ +———–+

| Mobile | | |

(a) | Data +—–//–| Base |

| Terminal [MT0] | | Station |

+———————+ +———–+

+——————-+ +——-+ +———–+

| ISDN | | | | |

(b) | speech + data +——-//–| [MT1] +–//–| Base |

| workstation [TE1] | | | | Station |

+——————-+ +——-+ +———–+

+—————-+ +——-+ +———–+

| X.21 and V.11 | | | | |

(c) | DTE +———-//–| [MT2] +–//–| Base |

| [TE2] | | | | Station |

+—————-+ +——-+ +———–+

+—————-+ +——-+ +———–+

| V.24 | | | | |

| and PCMCIA 2.1 | | | | |

(d) | DTE +————-//-| [MT2] +-//-| Base |

| [TE2] | | | | Station |

+—————-+ +——-+ +———–+

+—————-+ +——+ +——-+ +———–+

| V- or X | | | | | | |

| | | ISDN | | | | |

(e) | DTE +-//-| TA +-//-| [MT1] +-//-| Base |

| [TE2] | | [TA] | | | | Station |

+—————-+ +——+ +——-+ +———–+

+———————+ +———–+

| Speech-only MS | | |

(f) | +—–//–| Base |

| [MT0] | | Station |

+———————+ +———–+

Figure 2: Examples of physical implementations