User Manual

Architecture
Nortel Networks Confidential
3–40
PE/DCL/DD/0063
411–9001–063
Standard 12.07/EN September 2000
GSM/BSS V12
AMNU
SPU
Demodulation
Deciphering (optional)
De–interleaving
Decoding
Speech/data
or signaling
Speech/data
08.60 format coding
Signaling
Receiver
management
DRX radio
Figure 3–12 SPU reception functions
SPU
AMNU
08.60 format
decoding
Transmitter
management
Coding
Interleaving
Ciphering (optional)
Signaling Speech/data
DRX radio
Figure 3–13 SPU transmission functions