Verilink Red Zone Encryption (REMS) (880-502423-001) Product Manual - Manual (Page 43)

Frame Bit Repositioner (FBR)
Red Zone Encryption Management System (REMS) User Manual 4-3
Frame Bit Repositioner (FBR)
The Frame Bit Repositioner (FBR) provides two interfaces which
operate at 1.544 Mbps:
■
a T1 or RS-422 DTE interface
■
an RS-422 interface to the KG bulk encryption device
The Frame Bit Repositioner (FBR) is a dual module assembly, made up
of a paired CSU and DSU. These functions are implemented by one NCC
2020-based front module and one DIU 2130-based front module. Both
modules contain special Flash EPROMs.
See Figur e4-2, Functional Block Diagram of FBR Component Modules.
Figure 4-2 Functional Block Diagram of FBR Component Modules
The NCC 2020 connects to the Red Zone DTE equipment via its
CIM 2 0 20 rear connector module. The DIU 2130 connects to the
encryptor via its DIM 2530 rear connector module.
The FBR generates its own proprietary code and performs the following
functions:
■
Receives and decodes performance data originating at the BRC
This information is processed and stored in real time performance
registers, duplicating the near-end and far-end “Black Zone”
registers. The information can be viewed by the network
management system in the Red Zone, the Verilink’s PC/Windows-
based Access Manager 2000 (AM2000).
FBR
KG
-X
X En
c
ryp
to
r
128-pin
NCC 202
connecto
CIM 2020
128-pin
DIU 2130
connecto
DIM 2530
Shelf
backplane
MUX D4/
BRC
To network
To PC/Access Manage
Encryptor —>
ESF