Functional Description
150-512-100-03, Revision 03
4
September 25, 1998
HRU-512 List 1
shows a block diagram of the HRU-512 List 1.
Figure 1.
HRU-512 List 1 Block Diagram
The HRU-512 List 1 is provisioned at the HLU by the BANDwidth option to
process from 2 to 12 DS0 channels (active channels). The unused channels
are replaced by either 7F or FF according to the setting of the IDLE option.
The active channels can also be provisioned to be contiguous or alternate. The
signaling mode of each of the active channels can be optioned for either
Robbed Bit (RBS), as is required for voice channels, or Clear (CLR), which
is normally used for data applications.
If the RS-232 port of an HRE-421 remote enclosure is used to
access the HRU-512 List 1, a null modem cable adapter must
be used since the HRE-421 port is configured as DTE.
XMT
LINE
CI
MON
HDSL 1
XCVR
13
7
T1
FRAMER
B8ZS
AMI
ESF
SF
OK
ES
LB
R
330K
T
HDSL
S1
17
35
1
CIRCUIT
CHASSIS
-48VDC
GROUND
GROUND
MAR
POWER SUPPLY
MICROPROCESSOR
LOGIC LOOPBACK
CLOC
BPV
ERR
LOS
REM
LOC
RLBO
0
-15
TLOS-LB
DIS
EN
DEMUX
MUX
RS-
232
METALLIC
LOOPBACK
NREM
5
15
1
A
R1
DS1/RCV
DS1/TX
T1
( + )
I-CPE
T
R
( - )
0
60
1
+
-
60 mA MON
RCV
LINE
CI
MON
