Service Manual

GSM-205-323
MCUF
31st Oct 01
Tech. 6–4
Technical Description: Horizon macro indoor
CONTROLLED INTRODUCTION
68P02902W07-B
MCUF
MCUF overview
The main control unit with dual FMUX(MCUF) provides the site processing
functions, apart from RF functions of the transceiver. The MCUF also provides
switching for up to six network interfaces (via four NIUs) and up to 24
transceivers.
The cabinet may contain up to two MCUF modules, (one master and one for
redundancy). Each site and module has an electronic ID for remote
identification.
The MCUF provides the following functions:
 Maintenance and operational/control processing.
 Call processing (for example resource management and switching of
baseband hopping data).
 Switching of traffic and control information.
 Timing reference and network/BTS master clock synchronization.
 The functionality of two FMUX.
 Support of up to six transceivers via backplane in first cabinet and up to an
additional 18 transceivers via FMUX connections to other cabinets.
 Support of up to six E1 or T1 circuits, via NIU modules.
 Support of the CSFP function via the PCMCIA flash memory card.
Capability to
replace MCU of
M-Cell
6 and
M-Cell
2
The MCUF combines the MCU function of M-Cell 6 with two FMUX modules. If
the MCUF is installed in an M-Cell
6 or M-Cell 2 the MCUF automatically reverts
to the functionality of an MCU. The internal FMUX devices no longer operate. In
M-Cell
2 the reversion to MCU mode includes ability to directly connect to two
transceivers by modified use of the front panel FMUX fibre optic connections.
NOTE
This capability to use MCUF in M-Cell 6 and M-Cell 2 is only
possible with GSR4 or later.