Overhead functions – Quick Eagle Networks DL3800E User Manual
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DL3800E Inverse Multiplexer User’s Guide — July 9, 2001
2
Figure 2-3
DL3800E Unit Functional Schematic
Overhead Functions
The overhead functions consist of a controller, front panel, two RS232
communication interfaces (terminal and network management), and a
power supply.
The controller function is performed by a microprocessor on the main
board. The controller collects E1 statistics. It also processes E1 alarms and
performance monitoring information, as well as supporting unit
configuration, test and maintenance activities. Finally the Controller block
supports the front panel display, terminal port, and SNMP port interfaces.
The front panel consists of a 16-character vacuum fluorescent display,
4-key keypad, and LEDs. This panel can be used to provision the unit, run
diagnostic tests, or access performance statistics.
The serial ports are RS-232C compatible ports with one port supporting a
menu driven ASCII terminal interface, and the other port providing access
to the built-in SNMP agent functionality.
The DL3800E unit can be ordered with DC or AC power supplies and the
built-in power supply has a range of 110 to 240 VAC and -40 to -75 VDC.
TX_
DTE
INTF
E1 Framer
E1 TX Int.
T
X
F
I
F
O
TX LCA
IMUX Framer
RX_
DTE
INTF
R
X
F
I
F
O
RX
LCA
IMUX Buffer
IMUX Framer
E1 Framer & RX Int.
E1 Framer
E1 Framer
E1 Framer
E1 TX Int.
E1 TX Int.
E1 TX Int.
IMUX Buffer
IMUX Buffer
IMUX Buffer
IMUX Framer
IMUX Framer
IMUX Framer
E1 Framer & RX Int.
E1 Framer & RX Int.
E1 Framer & RX Int.