User's Manual

PN 8100-40 LGCell 4.0 Installation, Operation, and Reference Manual 4-1
620004-0 Rev. B
SECTION 4 LGCell Expansion Hub
The Expansion Hub is LGCell’s intermediate distribution point. It converts optical
signals that it receives from the Main Hub to intermediate frequency (IF) electrical
signals that it transmits over Cat-5 cable to the RAUs.
Figure 4-1 The Expansion Hub in an LGCell 1-1-1 Configuration*
LGCell Expansion Hub Features
• Mounts in a standard 19 in. (483 mm) equipment rack
• Connects to Main Hub using 62.5µm/125µm multimode fiber (MMF) cable
• Supports up to four RAUs per band using Cat-5 UTP/STP cable with RJ-45 con-
nectors
• Provides DC power to RAUs through the UTP/STP cable
• Has easily accessible front panel connectors
• Displays its status and the status of attached RAUs with front panel LEDs
• Communicates with Main Hub for system alarm status
RAU
Multimode Fiber
between Main Hub
and Expansion Hub
Cat-5 UTP/STP
between Expansion Hub and RAU
and Base Station or Repeater
Coaxial Cable between
Coaxial Cable between Main Hub
AC POWER
LGCell
TM
Main Hub
SYNC
POWER
LINK
SYNC
STATUS
DOWN
UP
1
LINK
SYNC
STATUS
DOWN
UP
2
LINK
SYNC
STATUS
DOWN
UP
3
LINK
SYNC
STATUS
DOWN
UP
4
TO EXPANSION HUB PORTS
AC POWER
LGCell
TM
Expansion Hub
SYNC
POWER
SYNC
LINK
STATUS
ANTENNA PORTS
DOWN
UP
MAIN HUB PORT
RAU and Passive Antenna
*1-1-1 configuration = 1 Main Hub, 1 Expansion Hub, and 1 Remote Access Unit