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TR 101 274 V1.1.1 (1998-06) |
4.2Interfaces and Services
4.2.1Reference model
Figure 1 below is the reference model used by TM4 for the standardization of P-MP systems.
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CCS |
CRS |
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Network Node |
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Another CRS may be |
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G
G
TE 
Baseband interface reference points F / G
directional antenna
omnidirectional or sector antenna
CCS |
Central Controller Station |
CRS |
Central Radio Station |
CS |
Central Station |
TS |
Terminal Station |
RS |
Repeater Station |
TE |
Terminal Equipment |
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System boundary |
Figure 1: TM4 reference model
4.2.2Services and facilities
Services and facilities for P-MP systems generally require "service transparency" which means that: "the exchange and the terminal communicate without being aware of the radio link". In practice this means that P-MP systems have to support all the transmission and call-control services which are required for supporting fixed analogue or digital telephony. P-MP frequency bands have been identified and shown in table 1.
ETSI