Card-edge connector
(IN) DSX-1Tip
{
19
AUX Port
(OUT) DSX-1 Tip 1
20
(IN) DSX-1Tip
{
A
MUX Port
(OUT) DSX-1 Tip 1
B
C
D
E
F
System alarm
H
Frame ground
J
HDSL2 SpanTip
K
Factory use only
L
{
31
(OUT) MATIF Tip
Metallic
Access
(TB6)
(IN)
MATIE
Tip
32
33
34
35
36
* Fuse alarm is normally floating
and at -48 Vdc when activated.
5
Once the H2TU-C is successfully installed and provisioned, access the Monitor or
Performance menus to clear the Performance and Alarm History screens to ensure
useful data.
L
T
OOPBACK
ESTING
Initiate loopback testing from the HiGain HDSL2 Monitor screen or use the MODE and SEL
pushbuttons. The inband codes below can also be sent by a test set.
H2TU-C
DSX-1
1111110
NLOC
CREM
1111000
Network
*
When enabled, TLOS is an automatic loopback
that occurs with an LOS at the remote DS1 input.
GNLB 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.
For more information about the maintenance screens, refer to the H2TU-C-319 List 3E
technical practice, document number LTPH-TP-1008-xx. Contact Customer Service to
obtain a copy of the practice.
Front-Panel Alarm Messages
Message
Description
(b)
PWR FEED SHRT
A short between the Tip and Ring of the HDSL2 pair.
(b)
PWR FEED GND
The HDSL2 loop is grounded.
(b)
PWR FEED OPEN
A line-power open condition.
SPNn-LOSW
The HDSL2 loop has lost synchronization. The span closest to the network has highest
priority.
MTA
Indicates that the H2TU-C is in a metallic test access state.
LLOS
No signal is detected at the DSX-1 input to the H2TU-C.
RLOS
No signal is detected at the DS1 input to the H2TU-R.
(c)
LAIS
Line Alarm Indication Signal.
(c)
RAIS
Remote Alarm Indication Signal.
(c)
TRCI
An RAI alarm (yellow LED) from the CPE with an error-free signal from the line unit or
network.
(c)
RRAI
An RAI alarm (yellow LED) from the Customer Premises Equipment (CPE) with errors
from the line unit or network.
(c)
xxx-DBER
A system DS1 Bit Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
(c)
PRMF
H2TU-R Performance Report Messaging BER threshold exceeded at far end.
(c)
PRMN
H2TU-R Performance Report Messaging BER threshold exceeded at near end.
xxx-HBER
A system HDSL2 Block Error Rate (BER) alarm. (xxx denotes either TUC or TUR.)
xxx-MAL
The margin on the HDSL2 loop has dropped below the threshold setting. (xxx denotes
either TUC or TUR.)
xxx-LA
The attenuation on the HDSL2 loop has exceeded the maximum threshold value. (xxx
denotes either TUC or TUR.)
(a) Front-panel alarm messages are listed in order of priority. ALRM displays prior to any alarm message.
Pressing the SEL button initiates an Alarm Cutoff (ACO) message.
(b) Message displays repeatedly as long as the alarm condition exists and is not included in the priority order.
(c) Does not activate the alarm relay access pin H.
To comply with the intrabuilding wiring requirements of
GR-1089 CORE, Section 4.5.9, the shields of the ABAM-type
cables that connect the H2TU-C-319 List 3E DSX-1 output ports
to the cross-connect panel must be grounded at both ends.
1
DSX-1 Ring (IN)
{
AUX Port
Segment 1
2
DSX-1 Ring 1 (OUT)
1
{
DSX-1 Ring (IN)
MUX Port
2
DSX-1 Ring 1 (OUT)
3
4
5
GND
Segment 3**
6
7
Management bus
8
-48V BAT
9
HDSL2 Span Ring
10
Fuse alarm*
13
MATIF
Ring
(OUT)
{
Metallic Access
(TB6)
14
MATIE Ring (IN)
15
Segment 2
16
17
18
** Segment 3 (A - L and 1 - 10) are
from standard 3192
alphanumeric c
onnector pins as reflected on the
on the backplane of the HMS-358 shelf.
H2TU-R
DS1
TLOS*
NREM
CLOC
1111100
1110000
11000
SMJK
Customer
Premises
(a)
Four-character display
Displays status, provisioning, and
alarm messages. See tables below
for a list of message descriptions.
List number
Status LED
Green LED
Normal operation.
Red LED
Fuse alarm.
HDSL2 acquisition or
Flashing Red LED
system alarm.
Yellow LED
A Customer Remote (CREM)
loopback or a Network Local
(NLOC) loopback is in effect.
Flashing Yellow LED
System is in Armed (ARM)
mode.
Off
Line power is off.
Card handle
(CLEI code and
ECI bar code
label on outside
labels
Display Code
A=xx
ACQ
AnL
ARM
BAD RT?
FERR
FLDL
HES
LBPV
M=xx
MNGD
PWR FEED OFF
PWR FEED ON
SIG
SnL
Display Code Description (default values in bold)
EQL
Sets the DSX-1 Equalizer to: 0 (0 to 132 ft.), 133 (133 to 265 ft.), 266 (266 to 398 ft.),
399 (399 to 532 ft.), or 533 (533 to 655 ft.).
RLBO
Sets the H2TU-R line buildout to 0 dB, -7.5 dB, or 15 dB.
LPBK
Enables (ENA) or disables (DIS) SmartJack loopback commands.
FT1
Enables (ENA) or disables (DIS) system response to DDS latching loopback commands for
fractional T1 applications.
ADS1
Selects either the DSX-1 (MUX) port as the active source for the DS1 Signal to transmit to the
HSDL Line Port #1, the auxiliary (AUX) DSX-1 Port #2 as the active source for DS1 signal to
transmit to the HDSL Line Port, or activates the Cut-through (CHR) mode. which electrically
connects the MUX port to the AUX port and the H2TU-C operates as a cut-through card.
SPLB xxxx
Configures system for generic (GNLB) or special inband loopback commands (A2LB, A3LB, or
A4LB).
PWRF
OFF = disables HDSL2 powering; ON = HDSL2 line voltage is -185 Vdc maximum.
HBER
1E-6 or 1E-7 = alarm activates when the HDSL2 BER alarm threshold exceeds 10
NONE = prevents generation of a system alarm due to BER.
DBER
Enables (ENA) or disables (DIS) fixed 24-hour DSX-1 BER alarm threshold.
LBTO
Loopback timeout = NONE, 20, 60, 120 minutes.
ALM
Enables (ENA) or disables (DIS) alarm indications on pin H.
DS1
DSX-1 line code = B8ZS, AMI.
CONV
H2TU-R frame format conversion = OFF (framing determined by the DS1 FRMG option), ACON
(auto detection of framing and potential frame conversion at the H2TU-R), or FCON (auto detection
of framing and forced frame format conversion at the H2TU-R).
FRMG
DS1 frame formatting = AUTO (auto framing mode) or UNFR (unframed mode).
ALMP
Enables system to output an alarm pattern: AIS or LOS.
BPVT
Enables (ENA) or disables (DIS) Bipolar Violation Transparency.
NLBP
Enables the H2TU-R to transmit either AIS or LOS towards CI for any network loopback.
TLOS
Enables (ENA) or disables (DIS) a loopback at the H2TU-R when an LOS occurs at its DS1 input.
RTPV
Enables (ENA) or disables (DIS) remote provisioning.
PRM
OFF = no enhanced Performance Report Messaging; SPRM = Supplemental PRM;
NPRM = Network PRM; S + N = SPRM + NPRM.
NAIS
If ALMP is set to AIS, this option specifies which pattern is sent to the network when a remote LOS
or AIS occurs. CI = AIS-CI sent to the network; AIS = AIS sent to the network.
ROVR
Enables (ENA) or disables (DIS) conversion of an ESF DS1 payload from the network with an
embedded RAI pattern to an SF-RAI pattern towards the CI at the H2TU-R. CONV option must be
set to FCON or ACON.
RACI
Enables (ENA) or disables (DIS) conversion of a DS1 SF-RAI signal received by the H2TU-R to an
SF-RAI-CI signal towards the network.
Code
CODE xxxx
FRM xxxx
LATT xx
(a) To scroll through system information messages, press the MODE button for 3 or more seconds.
Front panel
System option pushbuttons (for manual
setting of system parameters)
HiGain
HDSL2
Use MODE and SEL to manually modify user options,
H
initiate loopbacks, and display DSX-1 line parameters.
2
1
T
U
*
C
3
L
2
1
9
SETUP
M
S
O
3
E
D
L
E
STATUS
4
B
R
G
DSX-1 test access jacks
O
U
L
T
I
Connect standard test equipment.
N
E
B
R
G
I
N
L
I
N
E
Craft port provisioning
R
To access all system maintenance, provisioning
S
and performance screens, connect a standard
2
3
9-pin terminal cable between the serial port on a PC
of handle)
2
and the H2TU-C craft port.
Maintenance Terminal Modem Settings
9600 baud
8 data bits
DCE
No parity
1 stop bit
Hardware flow control: OFF
Terminal emulation software: VT100
Front-Panel Diagnostic Messages
Description (normal operating messages in bold)
The loop attenuation of the longest (maximum loss) span, measured in dB.
The multiplexers of the H2TU-C and H2TU-R are trying to establish synchronization.
The multiplexers of the two devices on Span n are trying to establish synchronization with
each other, where n is the number of the span.
Armed to respond to Intelligent Repeater Loop (ILR) codes.
The H2TU-C-319 is not receiving a response from the H2TU-R.
A framing bit error occurred at H2TU-C-319 DSX-1 input.
Flash download of firmware updates. (Contact Customer Service for update procedures.)
H2TU-C-319 HDSL2 loop cyclical redundancy check (CRC) error.
A local bipolar violation has been received at the DSX-1 input to the H2TU-C-319.
Indicates the power of the received HDSL2 signal relative to noise (S/N with respect to
21.5 dB). Any value of 6 dB or greater is adequate for reliable system operation.
The H2TU-C-319 is under control of the HMU-319 network management unit.
HDSL2 span power is turned off.
Indicates that the HDSL2 loop is not grounded or shorted.
The transceivers of the H2TU-C and H2TU-R are trying to establish contact with each
other on Span 1 of the HDSL2 loop.
The transceivers of the two devices on Span n are trying to establish contact with each
other, where n is the number of the span.
Front-Panel Configuration Options Using MODE and SEL
Front-Panel System Information Messages (Scroll Mode)
Description
Code
Line code setting (AMI or B8ZS). LIST xx
Frame pattern received from the
MARG xx
DSX-1 (SF, ESF, or UNFR).
Loop attenuation (0 to 40 dB).
VER x.xx
Default is 32.
Press MODE for 1 second and release it.
The front panel alternately displays the first
system parameter and its current setting.
Press SEL to step through all possible settings for
the displayed parameter.
Press MODE to update the parameter and advance
to the next parameter.
After scrolling through all the parameters, press SEL
to confirm changes when prompted with a CONF NO
message, or press MODE to cancel all changes.
Provides non-intrusive bridging jack
BRG
access to (IN) and from (OUT) the
HDSL2 span at the DSX-1 interface.
Allows monitoring of the T1 payloads.
LINE
Provides splitting jack access to
(IN) and from (OUT) the HDSL2 span
at the DSX-1 interface.
-6
-7
or 10
.
(a)
Description
List number of the H2TU-C.
Margin threshold (0 to 15 dB).
Default is 5.
Software version number.
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