CopperOptics 150-1218-02, Руководство пользователя

Страница: 6 / 19

Section 150-612-100
Revision 02
Page 6
8. FRONT PANEL
8.01 DS1. The top 60% of the front panel
addresses the following DS1 interface
features.
•
60 MA MON
These two test points allow the 60 mA. CPE current
option, if selected, to be measured. The current
flowing is related to the voltage measured across the
“ + “ and “ - “ test points by the following relationship:
CPE CURRENT =1 MA / 1 MV.
Typical readings range from 55 to 65 mv which
equate to a 55 to 65 mA. current range.
•
RCV & XMT ACCESS JACKS
These provide both splitting and monitor access
jacks to the CPE DS1 interface. See Figure 2 for
circuit details. Note that these jacks are transformer
isolated from the CPE DS1 metallic interface.
•
ALM
REM LOS
RED LED that indicates a Loss Of Signal at the T1
input to the REMote (HLU) unit. This condition
causes the HRU to transmit the AIS pattern to
towards the CPE.
LOC LOS
RED LED that indicates a Loss Of Signal at the T1
input to the LOCal (HRU) unit. This condition causes
HiGain-2 to either transmit the AIS pattern towards
the DSX-1 or to execute a logic loopback in the HRU
as a function of the TLOS user option setting. See
Paragraph 9.01 for details.
•
LB
NET
GREEN LED indicating the HRU is in a loopback
state in which the signal from the NETwork is being
looped back to the NETwork.
CI
YELLOW LED indicating the HRU is in a loopback
state in which the signal from the customer interface
(CI) is being looped back to the CI.
BUTTON
Depressing this front panel button for 5 seconds
forces the HRU into its NREM metallic loopback
state. The unit can be unlooped by either
depressing the button again for 5 seconds or via the
standard loopdown coded messages.
•
CODE
B8ZS
GREEN LED indicating that the user DS1 code
option is set to B8ZS. If however the user DS1 code
option is set to AUTO, this LED indicates that the
code of the DS1 signal being received at the HRU’s
DS1 input is B8ZS.
AMI
YELLOW LED indicating that the user DS1 code
option is set to AMI. If however the user DS1 code
option is set to AUTO, this LED indicates that the
code of the DS1 signal being received at the HRU’s
DS1 input is AMI.
BPV
RED LED that flashes every time a Bipolar Violation,
other than those associated with a B8ZS code, is
received at the HRU’s DS1 input.
•
FRM
ESF
GREEN LED indicating that framing pattern of the
signal being received at the HRU’s DS1 input is
ESF.
HLU-611
DCE
FEMALE MALE
2
5
3
2
5
3
RD (RECEIVE DATA)
TD (TRANSMIT DATA)
GND
DB9
DB9
DTE
DTE
TERMINAL
TERMINAL
3
2
7
DB25
Figure 3. DB-9 Pin-outs.