This document is an installation and maintenance
practice for the ADTRAN Total Access® SHDSL T1/
E1 Network Terminating Unit (NTU). Figure 1 illustrates the SHDSL T1/E1 NTU front panel, P/N
1225236L1.The SHDSL T1/E1 NTU is a network
terminating module using Single-Pair High Speed
Digital Subscriber Line (SHDSL) technology to
transport data over a single copper loop.
Revision History
This is the initial issue of this practice. Future changes
to this documentation will be explained in this
subsection.
2. DESCRIPTION
The SHDSL T1/E1 NTU was designed for use as a
remote unit to the Total Access 3000. The Total Access
SHDSL T1/E1 NTU provides an interface between the
SHDSL network and the customer’s Data Terminal
Equipment (DTE) for applications such as LAN to LAN
bridging, Frame Relay circuit, and PABX termination.
V.
2
4
Figure 1. SHDSL T1/E1 NTU Front Panel
The SHDSL T1/E1 NTU is span powered with local DC
power auto-switchover. No adjustments, strapping, or
configuration changes are necessary to power the
module. The SHDSL T1/E1 NTU configuration,
testing, and performance monitoring is managed by the
VT100 local management screen menus, remotely by an
EOC terminal session, or also remotely by EOC
message protocol initiated by the Total Access SHDSL
T1/E1 LTU.
61225236L1-5A 1
Trademarks: Any brand names and product names included in this document are
trademarks, registered tra demarks, or trade names of their respective holders.
Features
The features of the SHDSL T1/E1 NTU, P/N
1225236L1, include the following:
• Responds to an Embedded Operations Channel
(EOC) inventory response message
• Timing source is derived from the received SHDSL
network signal
• Local management access via VT100 menus
• Remote management access via EOC message
• Operates in T1 mode with a data rate of 200 kbps
to 1.544 Mbps and E1 mode with a data rate of
192 kbps to 2.048 Mbps
• Non-volatile memory configuration
• Factory default restoration via VT100 menu screens
or EOC messages
• Firmware upgrade using local management port or
remotely via EOC messages
• Password protection for local management access
and firmware upgrade
See Figure 2 for a typical configuration setup.
2. This device must accept any interference received,
including interference that may cause undesired
operation.
Changes or modifications not expressly approved by
ADTRAN could void the user’s authority to operate this
equipment.
Table 1. Compliance Codes
CodeInputOutput
Power Code (PC)FC
Telecommunication Code (TC)–X
Installation Code (IC)A–
3. INSTALLATION
C A U T I O N !
SUBJECT TO ELECTROSTATIC DAMAGE
OR DECREASE IN RELIABILITY.
HANDLING PRECAUTIONS REQUIRED.
Compliance
Tab l e 1 shows the compliance codes for the SHDSL T1/
E1 NTU. The SHDSL T1/E1 NTU is NRTL listed to the
applicable UL standards. The SHDSL T1/E1 NTU is to
be installed in a restricted access location and in a Type
“B” or “E” enclosure only.
This device complies with Part 15 of the FCC rules.
Operation is subject to the following two conditions:
1. This device may not cause harmful interference.
After unpacking the SHDSL T1/E1 NTU, inspect it for
damage. If damage has occurred, file a claim with the
carrier, then contact ADTRAN Customer Service.
Refer to the Warranty and Customer Service section for
further information. If possible, keep the original
shipping container for returning the SHDSL T1/E1
NTU for repair or for verification of shipping damage.
VT100
SHDSL
NTU
T1/E1
NTU
1225236L1
PWR
SHDSL
T1/E1
TEST
ALM
Customer T1 or E1
Equipment
(e.g., PABX)
LTU
1181308L1
2-Wire Twisted Pair
PWR
1
P
2
O
R
3
T
4
OPT
SHDSL
T1/E1
LTU
SHDSL
Figure 2. Typical System Application
2 Issue 1, August 200361225236L1-5A
Shipping Contents
The contents include the following items:
• SHDSL T1/E1 NTU
• SHDSL T1/E1 NTU Installation and Maintenance
Practice
CAUTION
Electronic modules can be damaged by ESD.
When handling modules, wear an antistatic
discharge wrist strap to prevent damage to
electronic components. Place modules in
antistatic packing material when transporting
or storing. When working on modules, always
place them on an approved antistatic mat that is
electrically grounded.
Instructions for Installing the Module
All connections of the SHDSL T1/E1 NTU are made
through card edge connectors. The module operates in a
standalone chassis, or the ADTRAN HR12 HDSL
chassis.
When the module is installed in any of the NTU enclosures, all connections are made through the enclosure
backplanes. Ensure chassis ground is properly
connected for either standalone or chassis-mounted
applications.
The SHDSL T1/E1 NTU is designed for a T200 or T400
type form factor housing and inserts into the customer
T1 or E1 T200 type equipment. Follow local practice
for installation of the SHDSL T1/E1 NTU.
The front panel provides LED status indicators for data
port, test, and alarm conditions.
The local management port is a DB-9 female connector
and is labeled V.24, with pinout and interchange circuits
per ITU-T V.24 standards. Tab le 2 illustrates the local
management port DB-9 pinouts.
LED Indicators
The front panel of the SHDSL T1/E1 NTU has five
LED status indicators. Tabl e 3 lists the LED descriptions.
Table 2. DB-9 Connector Pin Descriptions
Interchange Circuit
Pin
No.NameFunction
1109RLSDReceived Line Signal Detect - Internally connected to DTR and DSR
2104RDReceive Data from DCE
3103TDTransmit Data to DCE
4108/2DTRData Terminal Ready - Internally connected to RLSD and DSR
5102SGNDSignal Ground
6107DSRData Set Ready - Internally connected to RLSD and DTR
7105RTSReady to Send - Internally connected to CTS
8106CTSClear to Send - Internally connected to RTS
9---NCNot Connected
61225236L1-5AIssue 1, August 2003 3
Table 3. Front Panel LEDs
LEDIndicationDescription
PWROff
Green
SHDSLGreen
Ye ll ow
T1/E1Off
Green
TESTOff
Green
Ye ll ow
ALMOff
Ye ll ow
The module is powered off
The module is In Service
SHDSL loop is trained with good signal quality
SHDSL loop is trained with poor signal quality
Red
SHDSL loop is not trained
Port is active with alarms
Port is active with no alarms
Module is not in loopback or BERT
Local loopback is active or BERT is running with no errors
BERT is running with bit errors
BERT is running with no pattern sync
Red
No alarm condition detected
Alarm condition detected remotely
Red
Alarm condition detected locally
4. PROVISIONING
The SHDSL T1/E1 NTU menus are accessed via the
DB-9 front panel female connector which supports
VT100 emulation by PC based application programs or
by a virtual terminal session over the EOC.
The parameters of the VT100 terminal should be set as
follows:
• 9600 Baud
• No parity
• 8 Data bits
• 1 Stop bits
• No Flow Control
Once these steps have been completed, the following
options will appear in the SHDSL T1/E1 NTU Main
Menu:
1. Unit Information
2. Provisioning
3. Status
4. Test
5. Performance History
Windows HyperTerminal
Windows HyperTerminal can be used as a VT100
terminal emulation program. Open HyperTerminal by
selecting
to the
Help
Programs/Accessories/HyperTerminal
section of HyperTerminal for additional
. Refer
information.
NOTE
To ensure proper display background, select
VT100 terminal emulation under
Settings
.
The menu tree in Figure 3illustrates the path to every
provisioning, performance, and test access point in the
SHDSL T1/E1 menu system.
Tab l e 4 lists the complete set of configurable options
with settings and factory default values.
NOTE
When the NTU is in T1 mode, all related E1
options will be non-applicable. A non-applicable option setting is still changeable, but will
not take affect until the option become applicable.
4 Issue 1, August 200361225236L1-5A
5. OPERATION
Test Capabilities
The SHDSL T1/E1 NTU has the following test capabilities:
• Self diagnostics
• Local loopbacks
• EOC initiated remote loopbacks
• Inband remote loopback detection (E1 mode only)
• Internal bit error rate tester (BERT)
Self Diagnostics
The SHDSL T1/E1 NTU performs self diagnostic tests
of its Read Only Memory (ROM), Random Access
Memory (RAM), LEDs, and non-volatile configuration
setting upon power-up.
Customer Port
The SHDSL T1/E1 NTU operates in either E1 mode or
T1 mode.
E1 Mode
In E1 mode the port features are as follows:
• Carries information at the rate of 2.048 Mbps
• Uses CCS framed format with or without CRC-4
• Operates in either Alternate Mark Inversion (AMI)
or High-Density Bipolar 3 (HDB3) line code
• Provides programmable timeslot idle pattern
• Supports ISDN-PRA V3 service
• Displays additional status information via a local
VT100 management screen
See Tab le 5 for E1 port statistics definitions.
Local and Remote Loopbacks
For troubleshooting purposes, the SHDSL T1/E1 NTU
provides three types of loopback tests.
1. Dual sided
2. Network
3. Customer
Inband Loopback Detection
Inband remote loopback response is supported on the
E1 port. The SHDSL T1/E1 NTU supports V.54 and
PN127 inband signalling protocols.
BERT
The SHDSL T1/E1 NTU contains a built-in Bit Error
Rate Test (BERT). The BERT involves injecting and
detecting a Pseudorandom Binary Sequence (PRBS)
toward the network on the selected payload (i.e. G.703
or entire SHDSL payload). The PRBS used in the
SHDSL T1/E1 NTU is PRS15 as defined in ITU-T
0.150 and 0.151. It is also known as
2e15 – 1
pattern.
T1 Mode
In T1 mode the port features are as follows:
• Carries information at the rate of 1.544 Mbps
• Uses Superframe Format (SF) or Extended Superframe Format (ESF)
• Operates in either Alternate Mark Inversion (AMI)
or Bipolar w/8-Zero Substitution (B8ZS) line code
• Provides programmable timeslot idle pattern
• Monitors the Facility Data Link (FDL) for loopback
commands
• Displays additional status information via a local
VT100 management screen
CCS w/CRC-4LOS, LOF, or LOMFA condition, or if FE’s > 4 or CRC-4
errors ≥
Unavailable Seconds (UAS)N/AIf 10 continuous SES’s, then UAS
If 10 continuous seconds with no SES’s, then no UAS
Code Violations Count (CVC)UnframedIf BPV’s > 0
CCSIf BPV’s > 0, or FE’s > 0
300
CCS w/CRC-4If FE’s > 0 or CRC-4 errors > 0
8 Issue 1, August 200361225236L1-5A
Table 6. T1 Port Statistics Definitions
StatisticFraming ModeDefinition
Errored Seconds (ES)UnframedLOS condition or BPV’s > 0
SFLOS or LOF condition, or if BPV’s > 0 or FE’s > 0
ESFLOS or LOF condition, or if BPV’s > 0 or FE’s > 0
Severely Errored Seconds (SES)UnframedLOS condition or BPV’s > 1544
SFLOS or LOF condition, or if BPV’s > 1544 or if FE’s > 8
ESFLOS or LOF condition, or if BPV’s > 1544 or if FE’s > 8
Unavailable Seconds (UAS)N/AIf 10 continuous SES’s, then UAS
If 10 continuous seconds with no SES’s, then no UAS
Code Violations Count (CVC)UnframedIf BPV’s > 0
SFIf BPV’s > 0 or FE’s > 0
ESFIf BPV’s > 0 or FE’s > 0
Table 7. SHDSL T1/E1 NTU Specifications
6. MAINTENANCE
The SHDSL T1/E1 NTU requires no routine maintenance for normal operation.
ADTRAN does not recommend that repairs be
attempted in the field. Repair services may be obtained
by returning the defective unit to ADTRAN. Refer to
the Warranty and Customer Service section for further
information.
Operating Temperature:
Storage Temperature:
Relative Humidity:
Environmental
–0°C to 55°C
–40°C to 85°C
90 percent maximum @
50°C, noncondensing
7. SPECIFICATIONS
Specifications for the SHDSL T1/E1 NTU are detailed
in Tab le 7 .
8. WARRANTY AND CUSTOMER SERVICE
ADTRAN will replace or repair this product within the
warranty period if it does not meet its published specifications or fails while in service. Warranty information
can be found at www.adtran.com/warranty
.
Maximum Current Draw:
Maximum Heat
Dissipation:
Physical
Dimensions:
Weight:
Part Number
SHDSL T1/E1 NTU
Module:
0.074 A maximum
@ Ð48 VDC
3.55 watts
5.625 in. H x .625 in. W x
6.0 in. D
< 1 lb.
1225236L1
61225236L1-5AIssue 1, August 2003 9
10 Issue 1, August 200361225236L1-5A
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