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 61247002L1-5) available online at
.
©2007 ADTRAN, Inc.
All Rights Reserved.
HDSL
HTU-C NB/WB
for Litespan
P/N: 1247002L1
CLEI: SLL7AAAA_ _
*61
247002L
1-22A*
HDSL DEPLOYMENT GUIDELINES
♦
Cable Pairs must be non-loaded
♦
Total Bridged Tap < 2.5 kft
♦
No single Bridged Tap > 2 kft
♦
196 kHz insertion loss
≤
35 dB
♦
Pulse attenuation (loss on HDSL current system status screen)
≤
30 dB
♦
Maximum loop resistance is 800
Ω
♦
Impulse noise
≤
50 dBrn as measured using a 50 kb filter
♦
Wideband noise
≤
31 dBrn as measured using a 50 kb filter
CAUTION: If the L1 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 HTU-C. Also, copper
service wire pairs not in use are considered bridged tap to the HDSL
loops in service and should be considered in the deployment guidelines. If
the bridged tap presented by the unused loop violates the CSA guidelines,
the unused pair should be disconnected.
PROVISIONING OPTIONS
1. When set for FT1, the CLOS setting is ignored. System will send an FT1 idle signal from
the HTU-C NB/WB for Litespan to the network consisting of a repeating 7E byte payload.
2. This option is not available if the HTU-R P/N 1247026L7 is used in the circuit.
3. This option is only available if the HTU-R P/N 1247026L4 is used in the circuit.
4. This option is not available if the HTU-R P/N 1247026L6 is used in the circuit.
COMPLIANCE
Refer to the
HDSL HTU-C using Narrowband / Wideband for Litespan Compliance
Notice
(P/N 61247002L1-17) for detailed compliance information.
Provisioning Option
Option Setting
Default Settings
Line Code
B8ZS; AMI
B8ZS
Framing
AUTO; ESF; SF; UNF; FFFC
AUTO
Loopback Timeout
None; 60 minutes; 120 minutes
120 minutes
DS1 Transmit level
0dB; –15 dB
0 dB
Span Power
Enabled; Disabled
Enabled
DS1 Latching Loopback
(1)
T1; FT1
T1
Customer Loss Response
AIS; LPBK; CDI
AIS
NIU Loopback
(2)
Enabled; Disabled
Enabled
New England Loopback
(3)
Enabled; Disabled
Disabled
PRM Setting
(4)
None; SPRM; NPRM
None
Front Panel LEDs
RS-232 DB-9 CONNECTOR
Used to access performance monitoring data, perform loopbacks, and provision units
via VT 100 emulation applications, such as HyperTerminal–Private Edition. There
are two terminal emulation modes: Manual Update and Real-Time Update.
C
TRL
+T
toggles between modes.
Manual Update Mode
Press the spacebar three times to manually update the screen. Print screen and log
files commands are available in this mode.
Real-Time Mode
The default mode. Print screen and log file commands not available. Cursor
placement and screen highlighting are enabled. Provision the terminal port for
VT100 as follows:
♦
Data Rate of 1.2 kbps to 19.2 kbps
♦
Asynchronous Data Format:
♦
Eight data bits
♦
No parity (none)
♦
One stop bit
NOTE: When using a PC with terminal emulation software, be sure to disable any
power saving programs.
INSTALLATION
After unpacking the unit, inspect it for damage. If damage is noted, file a claim with
the carrier and then contact ADTRAN. For more information, refer to the Warranty.
Label
Status
Description
LOOP
{
z
2
Off
Green
Green Flashing
Unit is not in armed or loopback state.
A loopback is active on this unit.
Unit is in an armed state but not in loopback.
FAIL
{
z
Off
Red
Unit is initialized and working properly.
Initializing or unable to operate.
HDSL
z
z
Yellow
Red
Both loops are synchronized, but there is a yellow or red
alarm at the DS1 interface.
One or both loops are out of synchronization.
LP1 /LP2
{
z
z
z
5
Off
Green
Yellow
Red
Flashing
No synchronization between HTU-C and HTU-R on
loop 1/ loop 2.
Good signal quality on loop 1/ loop 2.
Marginal signal quality on loop 1/ loop 2.
Severely impaired signal quality on loop 1/ loop 2.
Error detected on either end of loop 1/ loop 2.
61247002L1-22A
0708
HDSL
HTU-C using Narrowband / Wideband for Litespan
®
