V
ERIFICATION
Once the H2TU-R-402 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-402 supports local and remote logon through a maintenance terminal
(VT-100 or a PC running VT-100 terminal-emulation software) connected to the craft port
on the H2TU-R-402 front panel.
The H2TU-R-402 accesses menus and screens that are replications of those viewed at the
H2TU-C. You can also view system settings and inventory, initiate loopbacks, monitor
performance, and configure the circuit.
To log on using a maintenance terminal:
1
Connect a maintenance terminal to the H2TU-R-402 craft port (see Modem Settings
in illustration above). The H2TU-R-402 Logon screen displays.
2
Press
+
to refresh the Logon screen, if necessary.
3
Type the first letter of the desired menu. Use the
to cycle through menu
selections, and press
to change a setting or display a menu.
L
OOPBACK
T
ESTING
Initiate loopback testing from the maintenance terminal menus or by using inband codes.
The inband codes shown below can be sent by a test set. For more information, refer to the
technical practice for the H2TU-C line unit.
ALM
L
ESF
SF
LOOP
B8ZS
AMI
LBK
H
D
S
L
2
H
2
T
U
*
R
4
0
2
D
S
1
IN
BRG
OUT
RS-232
DCE
SOLITAIRE
HiGain
PairGain
Alarm LED
Loopback LED
CLEI/ECI bar code label
Configuration number label
Loopback control button
Extraction handle
DS1 transmit (IN) and receive (OUT)
bridging jacks
HDSL2 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.
Pressing the button for 5 seconds activates
a remote loopback toward the network called
NREM and a local loopback toward the CPE
called CLOC.
The unit can be
looped down by either pressing the LPBK control
button again for 5 seconds or by the standard
loopdown inband commands.
Any existing loopback is terminated
before these are activated.
Use to remove the H2TU-R-402 from
the remote enclosure.
27
25
23
21
19
17
15
13
11
9
7
3
5
1
DS1Tip
DS1 Ring
Factory use only
Factory use only
Factory use only
DS1 Ring1
Circuit Ground
HDSL2 Ring
IN
OUT
HDSL2Tip
DS1Tip1
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 may be tied to earth ground according
to local practice.
Card-edge connector
Modem settings:
9600 baud
8 data bits
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation: VT-100
For non-intrusive test access.
(Inside handle)
List number
1A
Status LED Descriptions
LED Status
Indicates
Alarm (ALM) LED
Shows alarm states for remote and local Loss of Signal (LOS).
Solid red
Indicates a Loss of Signal (LOS) condition at the T1 input of the H2TU-R-402.
Blinking
Indicates a LOS condition at the T1 input of the H2TU-C line unit.
HDSL2 LED
Displays HDSL2 Loop condition.
Solid green
Indicates HDSL2 loop is in sync.
Blinking once
per second
Indicates the HDSL2 loop is trying to acquire sync.
Blinking 4 times
per second
Indicates a margin alarm condition on the HDSL2 loop.
Blinking 10 times
per second
Indicates a Cyclical Redundancy Check (CRC) error on the HDSL2 loop.
OFF
Indicates no activity on the HDSL2 loop.
DS1 Framing (FRM)
LEDs (ESF and SF)
Indicates framing patterns. If DS1 signals are not detected, the ESF, SF, B8ZS,
and AMI LEDs will not light.
ESF LED = Solid green
Indicates Extended Super Frame (ESF). The LED blinks once per second when a
frame error occurs.
SF LED = Solid green
Indicates Super Frame (SF). The LED blinks once per second when a frame error
occurs.
OFF
Indicates unframed or no signal.
DS1 Code LEDs (B8ZS
and AMI)
Indicates DS1 code options. If DS1 signals are not detected, the ESF, SF, B8ZS,
and AMI LEDs will not light.
B8ZS LED = Solid green
Indicates that the DS1 line code option is set to Bipolar with 8-Zero Substitution
(B8ZS). The LED blinks once per second when a string of excessive zeros is
detected.
AMI LED = Solid green
Indicates that the user DS1 line code option is set to Alternate Mark Inversion
(AMI). This LED blinks once per second when a Bipolar Violation (BPV) is
detected.
Loopback (LPBK) LED
Shows loopback states to and from the network and to and from the Customer
Interface (CI).
Solid yellow
Indicates Network Remote Loopback (NREM).
Blinking once
per second
Indicates Customer Local Loopback (CLOC) loopback state.
Blinking 4 times per
second
Indicates the H2TU-R is in an Armed state.
Type the first letter
To view:
onitor
A graphical representation of circuit activity and devices.
erformance
Performance history statistics (current, 24-hour, 48-hour, 31-day). Also displays
alarm status and count.
vent Log
Recent system events, their date and time of occurrence.
onfig
Configuration options (standard, PairGain, date and time, factory defaults).
nventory
Product information and circuit and unit identifications.
logon
H2TU-C line unit screens.
elp
Glossary, screen navigation keys, PairGain contact information.
For more detailed information about the Solitaire HDSL2 screens,
provisioning, flash download of firmware updates, and
troubleshooting, download the appropriate H2TU-C line unit technical
practice from the Customer Site portion of the PairGain Web page at
www.pairgain.com. A password is required to access the Customer
Site Web pages. If you do not have a password, contact your PairGain
sales representative.
GNLB Loopback Commands
Loopback
Inband Code
Description
NLOC
1111000
DSX-1 signal is looped back to the network at the H2TU-C.
NRG1
(a)
(a) H2RU regenerators (doublers) are supported in firmware version 3.0 and higher.
110000
DSX-1 signal is looped back to the network at H2RU1.
NRG2
111000
DSX-1 signal is looped back to the network at H2RU2.
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
Signal from customer is looped back to the customer at the
H2TU-C.
CRG1
111100
Signal from customer is looped back to the customer at H2RU1.
CRG2
111110
Signal from customer is looped back to the customer at H2RU2.
CLOC
1111100
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
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R
H
