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: 1221002L1
CLEI: SLL6211D_ _
H2TU-C for Litespan
®
Using Narrowband/Wideband Pairs
H TUC
DSL
1221002L1 NB/WB
STAT
RLOS
HLOS
HCRC
ARM
LBK
B8ZS
AHDSL2
*61221
002L1-
22D*
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.
To install the H2TU-C for Litespan, perform the following steps:
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.
TROUBLESHOOTING GUIDE
Compliance
Condition
Solution
At power up, all
front panel
indicators are
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.
The
STAT
LED
remains
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.
The
STAT
LED
is
off,
but the
HLOS
LED
remains
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.
The
STAT
LED
is
off,
but the
RLOS
LED
remains
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 LED INDICATORS
DSL
z
Green............... HDSL2 SNR quality is optimum (6 dB or higher)
z
Yellow ............. HDSL2 SNR quality is marginal (1-5 dB)
z
Red .................. HDSL2 SNR quality is poor (0 dB)
2
Flashing .......... HDSL2 Pulse Attenuation is >30 dB
STAT
{
Off ................... Indicates loss of power to the H2TU-R
z
Green............... Normal operation; HDSL2 synchronized with H2TU-R
2
Flashing Green Acquiring
HDSL2
synchronization with H2TU-R
z
Red .................. Failure indication; unable to start/load firmware
RLOS
{
Off ................... DS1 signal from CPE is present at H2TU-R
z
Red ................... DS1 signal from CPE is absent at H2TU-R or framing
does not match
HLOS
{
Off ................... HDSL2 synchronization achieved
z
Red .................. HDSL2 loss of synchronization
2
Flashing Red ... DC continuity fault detected on HDSL2 loop
HCRC
{
Off ................... No HDSL2 CRC errors within last 30 minutes
z
Yellow ............. Four or more HDSL2 CRC errors in last 30 minutes
z
Red .................. HDSL2 CRC errors are being detected
ARM/LBK
{
Off ................... No loopback active
z
Green............... Loopback is active on this module
z
Yellow ............. Module is armed but loopback is not active
B8ZS
{
Off ................... AMI line code
z
Green............... B8ZS line code
CARD EDGE PINOUT
ADTRAN
®
uses negative ground-referenced span powering voltage (–190 VDC) on
the HDSL2 loop. H2TU-R span powering can be disabled to allow locally powered
H2TU-R applications, if desired.
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:
NOTE: If the Litespan AHDSL2 is used in applications where narrowband and
wideband copper service wire pairs are connected simultaneously, only one
service pair can have terminating equipment connected to the H2TU-C.
Also, copper service wire pairs not in use are considered as bridge taps to
the HDSL2 loop in service and should be entered into the deployment
calculations listed in Section 4 of this practice. If the bridged taps presented
by the unused loop violates the CSA guidelines, the unused pair should be
disconnected.
CAUTION: Do not deploy a Litespan AHDSL2 into any Litespan Channel Bank
Assembly slot that has ADSL Power Distribution Fuse and Alarm
(PDFA) connections to Wideband pairs of the Channel Bank Assembly.
Litespan is a Registered trademark of Alcatel, Inc., Paris, France.
♦
Narrowband Tip - Pin A3
♦
Narrowband Ring - Pin A4
♦
Wideband Tip - Pin C7
♦
Wideband Ring - Pin C8
61221002L1-22D
0607
