Data Network Terminal Single-port and Multiport Operating Instructions
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The following products comply with the protection requirements of the European Union Council
Directive 89/336/EEC relating to electromagnetic compatibility (EMC), provided that installed
using EMC-compatible installation practices (installation in mechanical housings stated to be
EMC-compatible and using cabling material [at least as well shielded] and practices as stated
in relevant Nokia user manuals):
These operating instructions introduce the DNT2Mi Data Network Terminal and
provide information needed for its installation and use.
The terminal interface units that are used in DNT products are presented
separately in document DTE Interface Units for Nokia Data Network TerminalsOperating Instructions.
Figure 1.Single-port (above) and multiport (below) DNT2Mi terminals
Nokia DNT2Mi is a single- or multiport (sp/mp) data access network terminal
intended for customer premises. It provides a two-wire or four-wire SHDSL line
interface (ITU-T G.991.2) and up to three interchangeable DTE interface units.
The following interface units are available (for more information, refer to Table
Data Network Terminal Single-port and Multiport Operating Instructions
•G.704/2M
•EIA-530-A
•Ethernet
•VF
•D2048
Single-port and multiport versions
The single-port version offers one of the DTE interface types mentioned above,
whereas the multiport version can house up to three independent DTE interface
types. Additionally, the multiport version includes Time Division Multiplexing
(TDM), which allows dividing the transmissioncapacity overeach DTE interface
according to application needs.
Power supply
DNT2Mi can be fed either with AC 90 to 264 V, DC -20 to -75 V, or remotely via
ACL2i through the line.
Management
DNT2Mi can be managed locally with the front panel keys, Nokia’s hand-held
Service Terminal, or with a Microsoft Windows-based Macro Service Terminal
Emulator (MSTE) program running on a PC. For more information about
supported Windows operating systems, refer to the Macro Service TerminalEmulator User's Manual.
DNT2Mi can also be managed remotely with Nokia's Network Management
System (NMS).
The DNT2Mi Data Network Terminal can be used for Local Area Network
(LAN) and Private Automatic Branch Exchange (PABX) connections (see Figure
2). The device can be controlled, configured, and tested either by using the front
panel keys and the LCD display or via Nokia’s common network management
system.
Applications
PDH
network
Local
Data
PABX
SHDSL
DNT2Mi
Multiport
Figure 2.An example of DNT2Mi use
DNT2Mi canalso be used in point-to-pointconnections with a DNT2Mi terminal
at both ends of the line (see Figure 3).
Data Network Terminal Single-port and Multiport Operating Instructions
Data
PABX
LAN-IC
SHDSL
DNT2Mi multiport
Figure 3.DNT2Mi used in a point-to-point application
DNT2Mi multiport
Data
PABX
LAN-IC
DNT2Mi provides an n x 64 kbit/s (n = 1 to 32) data access and enables TDM
multiplexing of line rates to three n x 64k ports. It also incorporates V.110 rate
adaptation enabling port rates lower than 64 kbit/s.
The line rate is n x 64 kbit/s (n = 3 to 32 in two-wire connection; n = 6 to 32 in
four-wire connection but only even numbers can be used), and the Trellis Coded
Pulse Amplitude Modulation (TC-PAM) coding is used for transmission.
Data Network Terminal Single-port and Multiport Operating Instructions
STATUS
PWR TESTP1P2
P3
Single-port DNT2Mi
STATUS
PORT
PWR TEST
1. LED
indicators
Figure 4.Indicators and keys of the two DNT2Mi units
4.1.2Local management interface
The local managementinterface is located behind the front panel door(see Figure
5). The interface is used to manage DNT2Mi with Macro Service Terminal
Emulator (MSTE) running on a PC or with other Nokia management software.
DTR DSR DCD RTS CTS
DTR DSR DCD RTS CTS
2. LCD
display
OK EXIT
DNT2Mi
OK EXIT
DNT2M i
3. Front
panel keys
If signal 108 (DTR) is on, connecting the Service Terminal Emulator will
disconnect DNT2Mi from the remote network management. If signal 108 is off,
the entire network can be managed through this equipment.
Management interface cables of DNT2Mi are listed in Table 1.
Electrically, management interface signals comply with ITU-T V.28 or V.11. The
selection is made using either front panel menus or Q1 menus.
Data Network Terminal Single-port and Multiport Operating Instructions
Table 1.Management interface cables (Continued)
CodeNameConnector
Length
type
E62711.01Management cable
(ST -> DNT2Mi)
DZ60639.1Management cable
(PC -> DNT2Mi)
ST = Service Terminal
DNT2Mi = Single-port or multiport n x 64 kbit/s stand-alone Network Terminal
PC = PC + Service Terminal Emulator
ACL2i = 2 Mbit/s SHDSL Rack-mounted Line Terminal
RJ45/D15F1.5 m
RJ45/D25F3 m
Several DNT2Mi units can be connected to the same Q1 bus of V.11-type via a
local management interface.
Data Network Terminal Single-port and Multiport Operating Instructions
6-pin modular jack, RJ-11
Line
123456
Figure 8.Line interface connector
4.2.1Terminal interfaces
This section briefly introduces the DTE interface unit options. For more detailed
information, refer to document DTE Interface Units for Nokia Data NetworkTerminals Operating Instructions.
Pin
Line interface
Line 1a
1.
Line 1b
2.
3. Not connected
4. Not connected
5.
Line 2a (not in use in 2-w mode)
Line 2b (not in use in 2-w mode)
Data Network Terminal Single-port and Multiport Operating Instructions
EC PWR
EA
EL WL
LMI 10Base-T
18
CAS
Figure 10.DTE interface options (continued)
The interface type is selected by installing an appropriate interface unit. You can
do this without opening the terminal's case. The interface unit types are given in
Table 2.
1) In accordance with the ITU-T Recommendation V.28, this type of electrical
interface can be used up to 19.2 kbit/s. With proper cabling, however, operation up to
64 kbit/s is possible.
This chapter provides instructions on how to mechanically install and connect
DNT2Mi. The menu settings required for bringing the unit into use can be found
in Chapter 6.
5.1Electromagnetic compatibility
DNT2Mi complies with EMC specifications (refer to Chapter 10) when the
following conditions are fulfilled:
Installing DNT2Mi
•The securing screws of the multiport DNT2Mi cover are properly fastened.
•All multiport DNT2Mi ports are provided with adapters, or unused ports
provided with dummy plates.
•The DTE cables and connectors are provided with reliable shielding.
•The connector’s connecting screws are properly fastened, so that shielding
integrity from the metal housing of the equipment to the cable shield over
the interconnecting interface is secured.
•A grounded 3-conductor mains cord and a grounded mains outlet for
mains-powered DNT2Mi terminals, or a similar grounding for DCpowered versions, is used.
5.2Grounding of DNT2Mi
The AC-powered version of DNT2Mi is grounded properly when the mains cord
is connected to a grounded mains outlet.
The DC-powered version of DNT2Mi has a separate pin reserved for the ground
connection, refer to Section 5.8.
Data Network Terminal Single-port and Multiport Operating Instructions
5.3Clearances around DNT2Mi
When installing DNT2Mi on a wall or freely on a horizontal level, you must
ensure that there is an adequate space for connecting cables. Recommended
clearances are shown in Figure 11.
In a modem-shelf installation, slot sizing of the shelf ensures adequate horizontal
clearances between the units.
Heat released from the unit is insignificant, and does not therefore set
requirements on the clearances around the equipment. DNT2Mi is cooled through
natural convection through air inlets and outlets located in the bottom and top of
it.
Caution
Do not cover DNT2Mi. The air inlets and outlets must be unobstructed to
maintain proper circulation of air.
First examine the unit and make sure that it has not been damaged during
transportation. Also, check that you have the cables needed for connections
(mains cable, DTE cable, line cable).
Then proceed according to the steps below:
1.Insert DTE interface units into the DNT2Mi terminal, if needed, refer to
Section 5.5.
2.Insert DNT2Mi in a special shelf-like modem subrack or on a wall, if
needed, refer to Section 5.7. Otherwise, proceed with the free-standing
installation described in Section 5.6.
3.Plug the mains cord into a grounded mains outlet (AC version) or connect
the DC power lines (refer to Section 5.8).
Installing DNT2Mi
4. Connect DNT2Mi to your DTE and to the line.
5.Switch on the power (AC or DC). The modem performs a self test.
6.Adjust the LCD contrast, if needed, refer to Section 5.9.2.
Then proceed to check that the main settings are correct (the settings are
described in Chapter 6). The settings can be checked and altered using
either the front panel keys and display (Chapter 8) or by using the Q1
connection (Chapter 9).
5.5Inserting DTE interface units
Caution
The equipment is sensitive to static electricity. When handling the units you
should follow the general instructions concerning handling of ESD-sensitive
equipment. You should always take antistatic precautions (such as a wrist
grounding) when handling a plug-in unit once it has been removed from its
antistatic packaging.
If the DTE interface units are not pre-inserted or a unit needs to be changed,
follow the instructions below.