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3CC08991ATAA TQ BJA 01
Issue 01 -- March 2004
Figure 7 - Block diagram of a 1+ 0 station (Light IDU versions)
Power supply
Tributary ports
Multiplexing and control
unit
(MCU Light)
Tributary interface
DC
Tributaries
1 to 4
INDOOR UNIT
F
NMS
(Supervision
bus)
TS/TC
alarms
Mediation
device
ESC3
Modem &
Monitoring
Cable
interface
Cable
IF
block
RF
equip.
Antenna
Power supply
unit
OUTDOOR UNIT
Equipment not included in
the standard configuration
but sold as options
Light
Service kit
Alcatel or
Customer
OS
or
Local loop
Attenuator
(RQ2)
(SNMP)
Functions set up in the
MCU Light board
2.2.1.1 -- Operation of the main IDU (InDoor Unit) (classic IDU version)
The Line Access Units (LAU) offer all the passive functions required to provide transmit and receive G.703
interfaces for the tributaries and 2 Mbit/s auxiliary bit stream (when there is one). This mainly entails impedance
matching. Two types of board can be used:
--
LAU 3CC06059Axxx: eight ports for 2 Mbit/s tributaries (two boards of this type are used for the
16 x 2 Mbit/s configuration),
--
LAU 3CC06061Axxx: one port for 34 Mbit/s + one 2 Mbit/s auxiliary bit stream port.
The LIU (Line Interface Unit) boards provide all the active functions required for transmit and receive mode
G.703 interfacing of tributaries and the 2 Mbit/s auxiliary bit stream (mainly HDB3
{
HCMOS code conversion).
The LIU boards are daughter boards that plug into the MCU board. Three types of board can be used:
--
LIU 3CC05818Axxx: four ports for 2 Mbit/s tributaries,
--
LIU 3CC06026Axxx: eight ports for 2 Mbit/s tributaries,
--
LIU 3CC06119Axxx: eight port extension unit, used in conjunction with the eight port LIU board,
3CC06026Axxx, for the 16 x 2 Mbit/s configuration,
--
LIU 3CC06118AAxx: one port for 34 Mbit/s + one 2 Mbit/s auxiliary bit stream port.
The Multiplexing and Control Unit (MCU) handles:
--
multiplexing/demultiplexing functions, to assemble the aggregate for transmission and restore the
tributaries from the received aggregate,
--
cross-connecting of 2 Mbit/s tributaries,
--
dropping/insertion of engineering service channels (up to 5) and the 2 Mbit/s auxiliary bit stream (when
there is one):
S
ESC N
_
1: reserved for the supervision channel,
S
ESC N
_
2: telephone channel with selective calling,
S
ESC N
_
3: V.11 or V.28 64 kbit/s interface,
S
ESC N
_
4 and N
_
5: V.11 64 kbit/s interfaces (not available for the 2 x 2 Mbit/s rate),
Summary of Contents for 9400 UX
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