C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
For more information, refer to the Installation and Maintenance Practice (P/N 61221002L1-5) available online at
.
©2006 ADTRAN, Inc.
All Rights Reserved.
HDSL2
H2TU-C
P/N: 1221002L2
CLEI: SLL5R36G_ _
H TUC
DSL
1221002L2 NB
STAT
RLOS
HLOS
HCRC
ARM
LBK
B8ZS
AHDSL2
*
612210
02L2-22
E*
TROUBLESHOOTING GUIDE
CARD EDGE PINOUT
ADTRAN uses negative ground-referenced span powering voltage (–190 VDC) on the
HDSL2 loop. If desired, disable H2TU-R span powering to allow locally powered H2TU-R
applications.
H2TU-C for Litespan plugs directly into a Litespan channel bank assembly channel unit slot.
Litespan system software must be version 11.0.0 or higher. The tip and ring connections
from the H2TU-C to the shelf are made through card edge pins A3 (Narrowband Tip) and A4
(Narrowband Ring).
H2TU-C for Litespan supports narrowband cabling on the Litespan RT shelf. For more
information regarding the cabling, refer to Alcatel document OSP 363-405-270.
COMPLIANCE
Condition
Solution
Power up: all
front panel
indicators
off
1. Verify that the channel bank or ONU BPS power LEDs are on.
2. Make sure that unit is fully and correctly inserted into the channel bank or ONU.
3. If step 1 fails, contact Alcatel customer service (800-848-0333). If step 1 passes,
but step 2 fails, replace the H2TU-C.
STAT
LED
Red.
1. Verify that the channel bank or ONU BPS power LEDs are on.
2. Verify that the equipment type for the Litespan H2TU-C slot is AHDSL2. Using
TL1, equipment type is shown with the command rtrv-eqpt::AID, where AID is
the access identifier (i.e., cot-1-15).
3. If step 1 fails, contact Alcatel customer service. If step 1 and step 2 pass, replace
the H2TU-C. If step 1 passes but step 2 fails, delete the equipment record (i.e.,
dlt-eqpt::cot-1-15 with TL1) and reinsert the card, or equip the slot with the
currently reserved equipment type.
STAT
LED
off;
HLOS
LED
Red
1. Confirm that the HDSL2 loop is not open.
2. Confirm that the HDSL2 loop is not shorted.
3. Verify the loop conforms to CSA guidelines and is not too long. Loop loss at 196
kHz should be less than 35 dB.
4. Verify that the HDSL2 loop has acceptable noise limits.
5. Verify that tip and ring of each HDSL2 loop belongs to the same twisted pair.
6. If steps 1 through 5 pass, but the
HLOS
LED remains red, replace the H2TU-C.
7. If step 6 fails, replace the H2TU-R.
STAT
LED
off;
RLOS
LED
Red.
1. Check that framing line coding are set appropriately for T1 data at the H2TU-R.
2. Check that the
RLOS
LED at the H2TU-R is off.
3. If step 1 fails, change the appropriate framing and line coding. If step 1 passes,
but step 2 fails, a problem may exist at the H2TU-R T1 interface. If the problem
does not exist at the T1 interface, replace the H2TU-C.
Code
Input
Output
Power Code (PC)
F
C
Telecommunication Code (TC)
–
X
Installation Code (IC)
A
–
FRONT PANEL LEDS
INSTALLATION
After unpacking the unit, inspect it for damage. If damage is noted, file a claim
with the carrier and then contact ADTRAN. Refer to Warranty.
Follow the steps below to install the H2TU-C for Litespan:
1. If present, remove the Access Module Blank from the appropriate access
module slot of the chassis.
2. Pull the ejector latch, located on the lower right-hand side of the H2TU-C
for Litespan front panel, from its closed position.
3. Hold the H2TU-C for Litespan by the front panel while supporting the
bottom edge of the module with the ejector latch opened to engage the
chassis edge. Align the module edges to fit in the lower and upper guide
grooves for the access module slot.
4. Slide the module into the access module slot. Simultaneous thumb pressure
at the top and at the bottom of the module ensures that the module is firmly
positioned against the backplane of the chassis. Secure the module in place
by pushing up and in on the ejector latch.
When installed, the H2TU-C for Litespan runs a series of self-tests. Once the
self-tests are complete, the status LEDs reflect the true state of the hardware.
Label
Status
Description
DSL
z
z
z
2
Green
Yellow
Red
Flashing Red
HDSL2 SNR quality is optimum (6 dB or higher)
HDSL2 SNR quality is marginal (1-5 dB)
HDSL2 SNR quality is poor (0 dB)
HDSL2 Pulse Attenuation is >30 dB
STAT
{
z
2
z
Off
Green
Flashing Green
Red
Indicates loss of power to the H2TU-R
Normal; HDSL2 synchronization with H2TU-R
Acquiring HDSL2 synchronization with H2TU-R
Failure indication; unable to start/load firmware
RLOS
{
z
Off`
Red
DS1 signal from CPE is present at H2TU-R
DS1 signal from CPE is absent at H2TU-R or
framing does not match
HLOS
{
z
2
Off
Red
Flashing Red
HDSL2 synchronization achieved
HDSL2 loss of synchronization
DC continuity fault detected on HDSL2 loop
HCRC
{
z
z
Off
Yellow
Red
No HDSL2 CRC errors within last 30 minutes
Four or more HDSL2 CRC errors in last 30 minutes
HDSL2 CRC errors are being detected
ARM/
LBK
{
z
z
Off
Green
Yellow
No loopback active
Loopback is active on this module
Module is armed but loopback is not active
B8ZS
{
z
Off
Green
AMI line code
B8ZS line code
61221002L2-22E
0612
HDSL2
H2TU-C for Litespan
®
Using Narrowband Pairs
