Specifications

Chapter 1 Introduction
10
1.3 Card Options
The FRM220 is capable of supporting a variety of in-band managed card types which may be mixed and
matched in any slot of the rack. Please refer to Appendix A of the latest version manual for details of all the card
options and operation for the FRM220.
1.4 NMC (SNMP)
1.4.1 NMC Introduction
The FRM220 must be ordered with an NMC (Network Management Controller) Card in order to support
management. The card is placed in the far left, number one card slot. Management is accomplished either via local
control on the asynchronous RS-232 port with an ASCII terminal or via Ethernet and any standard SNMP network
management software that supports MIB-II. The Web based interface provides an easy method for the user to
operate and monitor the whole system through a more user friendly point and click graphic system, using any web
browser. Almost all FRM220 cards support remote in-band configuration when paired with the same type FRM220
or FMC stand-alone in-band converter.
Figure 1-2 NMC Block Diagram
The design of the Network Management Controller is built around a 32 bit embedded processor. Most cards
are designed using 8 bit 8051 microprocessors that handle all configuration of the converter card through software
and provide the communication via RS-485 bus from the converter card to the Network Management Controller
(NMC).
Figure 1-3 FRM220 System Block Diagram
AC
or
DC
AC
or
DC
DCBus
Lo
g
ic
NMC
Console Ethernet
Slot 1
DCBus
Lo
g
ic
MC
Fiber
Electrical
Slot 2
DCBus
Lo
g
ic
MC
Fiber
Electrical
Slot 3
DCBus
Lo
g
ic
MC
Fiber
Electrical
Slot 4
DCBus
Lo
g
ic
MC
Fiber
Electrical
Slot 20
DC
Bus
RS485
Bus
32 bit CPU
(embedded)
PHY
RS232 drive
r
RS485 drive
r
DRAM Flash
Re
g
. LEDs
DB9
RJ-45
Edge Connector
Card Face
12VDC