V
ERIFICATION
Once the H2TU-R is installed, verify that it is operating properly by monitoring the Status
LEDs on the front panel.
L
OGGING
ON
TO
THE
M
AIN
M
ENU
The H2TU-R supports local and remote logon through a maintenance terminal (ASCII
terminal or a PC running terminal emulation software) connected to the craft port on the
H2TU-R front panel.
Logging on creates menus and screens for the H2TU-R that are replications of those viewed
at the H2TU-C. Once logged on, you can view system settings and inventory, initiate
loopbacks, monitor performance, and configure the circuit.
To log on using a maintenance terminal:
1
Press
+
to refresh the Logon screen, if necessary.
2
Press the first letter of the desired menu. Use the
to cycle through menu
selections, and press
to change a setting or to display a menu.
L
OOPBACK
T
ESTING
Initiate loopback testing from the maintenance menus, H2TU-R front-panel pushbutton,
H2TU-C front-panel pushbuttons, or with inband codes sent by a test set (see table below).
For more information about loopback testing, refer to the H2TU-C line unit user manual.
Status LED Descriptions
LED/Status
Function
ALM
Solid red Remote Loss of DS1 Signal (RLOS) present at the H2TU-R.
Flashing red once per second Local Loss of DS1 Signal (LLOS) present at the H2TU-C.
Loop
OFF No activity on the HDSL2 loop.
Solid green Normal operation: the HDSL2 span is synchronized.
Flashing green once per second HDSL2 loop synchronization attempt.
Flashing green 4 times per second HDSL2 margin alarm or loop attenuation alarm present at the H2TU-R.
Flashing green 10 times per seconds HDSL2 CRC error present at the H2TU-R.
ESF
OFF Unframed DS1 present at the H2TU-R or no DS1 detected at the
H2TU-R.
Solid green ESF framing present on the incoming DS1 signal.
Flashing green once per second ESF framing and frame error/CRC present on the incoming DS1 signal.
SF
OFF Unframed DS1 present at the H2TU-R or no DS1 detected at the
H2TU-R.
Solid green SF framing present on the incoming DS1 signal.
Flashing green once per second SF framing and frame error present on the incoming DS1 signal.
B8ZS
OFF HDSL2 span is not synchronized (no DS1 signal detected).
Solid green B8ZS is provisioned or is detected when set to AUTO.
Flashing green once per second B8ZS and string of excess zeros detected on the incoming DS-1 signal.
AMI
OFF HDSL2 span is not synchronized (no DS1 signal detected).
Solid green AMI is provisioned or detected when set to AUTO.
Flashing green once per second AMI and BPV detected on the incoming DS-1.
LBK
Solid yellow Loopback in H2TU-R towards network (NREM, SMJK, or TLOS).
Flashing yellow once per second Loopback in H2TU-R towards customer.
Flashing yellow 4 times per second System ARMed for loopback.
Monitor
Performance
Event Log
Config
Inventory
Report
Rlogon
Help
+------------------------------------------------+
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|
|
ADC DSL Systems, Inc.
|
|
HiGain HDSL2
|
|
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|
Voice:
800.366.3891 ext 73223
|
|
Fax
:
714.730.2400
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|
+------------------------------------------------+
ID: xxxx--xxxx--xxxx--xxxx
01/24/2003 06:38:12
H2TU-C
System: OK
Type the first letter
To view:
onitor
A graphical representation of circuit activity and devices.
erformance
Performance history statistics (current, 25-hour, 48-hour, 31-day, and blockage
indicator) at DS1 and HDSL interfaces. Also, displays alarm status and count.
vent log
Sectionalized Event History for alarms and errors at all four legs of the DS1 signal at
the H2TU-R.
onfig
Configuration options (standard, ADC, signal generation, date and time,
master clear, factory defaults).
nventory
Product information, circuit and unit identifications.
logon
Maintenance terminal screens at the H2TU-C.
elp
Glossary, screen navigation keys, ADC contact information.
Rep
rt
Downloading status and performance monitoring data to file.
For more information about the HDSL2 line unit maintenance
screens, refer to the H2TU-C line unit user manual. Copies of ADC line
unit user manuals can be downloaded from the ADC website at
www.adc.com. To order a hard copy, please contact your sales
representative.
Loopback Commands
Loopback
Inband Code
Description
NLOC
1111000
DSX-1 signal is looped back to the network at the H2TU-C.
NREM
1110000
DSX-1 signal is looped back to the network at the H2TU-R.
SMJK
11000
DSX-1 signal is looped back to the network at the H2TU-R SmartJack module.
CREM
1111110
DS1 signal from customer is looped back to the customer at the H2TU-C.
CLOC
1111100
DS1 signal from customer is looped back to the customer at the H2TU-R.
Loopdown
11100
Deactivates any of the above loopbacks.
CTRL
R
SPACEBAR
ENTER
M
P
E
C
I
R
H
O
Network
H2TU-C
H2TU-R
TLOS*
NLOC
CREM
CLOC
NREM
SMJK
* When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
Toward Customer
Toward Network
Customer
Premises
DS1
DSX-1
H0025-B
HDSL2
ALM
L
ESF
SF
LOOP
B8ZS
AMI
LBK
H
2
T
U
*
R
4
0
2
D
S
1
IN
BRG
OUT
RS-232
DCE
Alarm LED
Loopback LED
CLEI/ECI bar code label
Configuration number label
Loopback control pushbutton
Extraction handle
DS1 transmit (IN) and receive (OUT)
bridging jacks
Loop LED
DS1 framing LEDs
DS1 line code LEDs
Craft port provisioning
To access all system maintenance, provisioning
and performance screens, connect a standard
9-pin terminal cable between the serial port on a
PC and the H2TU-R craft port.
Press the pushbutton for 5 seconds to activate a loopback
towards the customer at the Central Office (CREM).
The unit can be looped down by pressing the
LPBK control pushbutton again for 5 seconds, by the standard
loopdown inband messages, or by the maintenance terminal.
Any existing loopback is terminated before these loopbacks
are activated.
Use to remove the H2TU-R-402 from its slot.
For non-intrusive test access.
(Inside handle)
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT100
Maintenance Terminal Modem Settings
List number
27
25
23
21
19
17
15
13
11
9
7
3
5
1
Tip
Ring
Factory use only
Factory use only
Factory use only
Ring 1
Circuit ground
Ring
DS1 IN
Tip
Tip 1
Chassis ground*
Chassis ground*
28
26
24
22
20
18
16
14
12
10
8
4
6
2
55
53
51
49
47
45
43
41
39
37
35
32
31
56
54
52
50
48
46
44
42
40
38
36
34
30
33
29
Active pins are highlighted in black.
* Chassis ground must be tied to Earth ground or network ground according to local practice.
HDSL2
Span
DS1 OUT
−
48V
HiGain
HDSL2
Automatic protection switch power
Automatic protection switch control
H0051-B
