Eicon Networks ISDN NT1 Unit Manuale utente
ISDN Network
Termination (NT1)
Installation Guide
Fourth Edition (March 2001) 203-077-04
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Table of Contents
Introduction ............................................................................ 4
Setting up the ISDN NT1 ....................................................... 4
Understanding the Signal Lights ............................................ 7
Appendix A: Illustrated Scenarios ......................................... 8
Appendix B: Pin Assignments ............................................... 9
Appendix C: Switches ......................................................... 10
Technical Specifications ...................................................... 10
International Regulatory Information .................................. 11
Introduction
The Eicon Networks ISDN NT1 is a compact network termination
device for connecting data terminal equipment to an Integrated
Services Digital Network (ISDN).
The NT1 provides an interface port without the need for a specialized
interface cable. You can connect ISDN devices to the NT1 through
two S/T interface ports.
This installation guide describes how to set up the NT1 and connect
your devices to it.
Setting up the ISDN NT1
You can connect up to two ISDN devices —such as an ISDN fax or
phone—to the NT1. However, there are some restrictions on how far
the ISDN devices can be located from the NT1.
• The ISDN devices must be located within 150 meters (500 feet)
of the NT1. Alternatively, you can connect a single device at a
distance of up to 900 meters (3000 feet), but in this case only one
device can be connected.
Follow the instructions below to set up the NT1. Be careful not to
touch any exposed wires.
1 Determine Your Termination Requirements
The ISDN NT1 and your other ISDN devices must be set to a
specific termination value according to:
• how many other ISDN devices you connect to the NT1, and
• the distance of each ISDN device from the NT1.
Table 1 lists all the different ways to set up the NT1 and gives the
termination values required in each case.
Locate the row which exactly matches how you plan to use the
NT1. To help you, an illustration of each row is provided
beginning on page 8, and two examples are given below the table.
You will use the information under the headings “Termination”
and “NT1 Switch Settings” in Step 2.
Eicon Network Termination (NT1) Installation Guide 5
Note: The table uses metric measurements. The equivalent imperial
measures are: 75 m (250 ft), 150 m (500 ft), 900 m (3000 ft).
Table 1. Determining Termination Settings
2 Set the Required Termination
You must set the NT1 and your ISDN devices to the termination
value indicated by Table 1.
Set the termination on your ISDN devices to the value specified
under “Termination—Other Devices.” The manuals which came
with your ISDN devices can tell you how to do this.
To set the termination on the NT1, you manipulate five small switches
on the rear of the unit, shown in Figure 1, to match the settings given
under the heading “NT1 Switch Settings” in Table 1.
Figure 1. Rear Panel
Devices Connected to the NT1 Termination NT1 Switch Settings
ISDN Devices NT1 ISDN
Devices
1 2 3 4 5
# Number Distance
11 up to 75 m 50 ΩNone on on on on on
2or100 Ω100 Ωoff on off on on
375 to 900 m 100 Ω100 Ωoff on off on off
42 up to 75 m 50 ΩNone on on on on on
5orNone 100 Ωoff off off off on
675 to 150 m None 100 Ωoff off off off off
Connect your ISDN
wall socket to this port
Connect the power
supply to this port
Select the termination setting
using these switches
6 Eicon Network Termination (NT1) Installation Guide
For example, if you determined that row #3 describes how you
will be using the NT1, set switches 1, 3, and 5 to the OFF position
(up), and set switches 2 and 4 to the ON position (down).
Note that these switch settings reflect both the termination value
and the distance of other ISDN devices from the NT1. This is why,
for example, row #2 and row #3 have different switch settings,
even though the NT1 termination value for both is 100 Ω
. If you
are interested, an explanation of the specific function of each
switch is given in “Appendix C: Switches,” at the end of this
installation guide.
3 Connect the Power Supply
Plug the power supply into the jack labelled “Power” on the rear
panel of the NT1 (see Figure 1). Plug the other end into the wall
socket.
4 Connect Your ISDN Line
Locate the RJ45-to-RJ11 cable included with the NT1. Plug the
RJ45 end (the larger end of the cable) into the jack labelled “U”
on the rear panel (see Figure 1). Plug the RJ11 end of the cable
into your ISDN wall outlet..
Figure 2. Front Panel
Connect the ISDN Device to a port labelled “S/T.” Connect your
other ISDN devices to the remaining port labelled “S/T.”
The Eicon NT1 and all the devices you connected to it should now
be fully functional. The next section, “Understanding the Signal
Lights,” explains how to interpret the diagnostic signal lights
while using the NT1.
S/T Ports Signal Lights
Eicon Network Termination (NT1) Installation Guide 7
Understanding the Signal Lights
The three lights (LEDs) on the front panel of the NT1 provide
information about the status of the NT1 and the ISDN line.
Figure 3. Signal Lights
Table 2 explains the significance of each light.
Table 2. Explanation of the Signals
Light State Explanation
L-BK Off Normal.
On Your ISDN service provider is
conducting a loopback test.
LINE On The S/T and U interfaces are not active.
Flashes 8 times The NT1 is trying to activate the
U-interface link.
Flashes once per second The S/T interface is not fully active.
Off The S/T and U interfaces are fully active.
PWR On The power supply is connected.
Off The NT1 is not receiving power.
L-BK LINE PWR
8 Eicon Network Termination (NT1) Installation Guide
Appendix A: Illustrated Scenarios
Find the illustration which matches how you plan to use the Eicon
NT1, then consult the appropriate row in Table 1 on page 5 to find the
required settings for the NT1 and for your other ISDN devices.
Row #1 and #2: One device up to 75 meters from the NT1.
Figure 4. One device up to 75 meters from the NT1
Row #3: One device up 75 to 900 meters from the NT1, without an
EiconCard attached.
Figure 5. One device up to 900 metres from the NT1
Row #4 and #5: Two devices up to 75 meters from the NT1, with or
without an EiconCard attached.
Figure 6. Two devices up to 75 metres from the NT1
Row #6: Two devices located from 75 to 150 meters.
Figure 7. Two devices up to 75 - 150 meters from the NT1
Up to 75
NT1
Up to 900 meters
NT1
Up to 75
NT1
75 to 150
NT1
Eicon Network Termination (NT1) Installation Guide 9
Appendix B: Pin Assignments
Pin assignments for each port are given below.
S/T interface Ports
Each port consists of an RJ-45 connector with the pin assignments
listed in Table 3.
Table 3. RJ-45 Pin Connector Assignments
U-Interface Port
The U-interface port consists of an RJ-45 connector with the pin
assignments listed in Table 4.
Table 4. U-Interface Pin Assignments
Power Connector
The power connector is a minijack as described in Table 5.
Table 5. Power Connector Pin Assignments
Pin Function
3RX+
4TX+
5TX-
6RX-
Pin Function
4TIP
5RING
Component Function
Center pin +9 VDC
Outer casing GND
10 Eicon Network Termination (NT1) Installation Guide
Appendix C: Switches
The significance of each switch on the rear panel of the ISDN NT1
is given in Table 6.
Table 6. Significance of the Switches
Technical Specifications
Safety
• Use with a certified Class 2 power supply.
Typical Power Requirements
•80mAat+9Volts
Environmental Requirements
• Operating temperature: 0°C to 50°C
• Operating humidity: 0 to 90% (non-condensing)
• Barometric operating pressure: 86 to 106 kPascals
Value Switch Positions
12345
No termination off off off off
Termination of 50 Ωon on on on
Termination of 100 Ωoff on off on
Devices located less than 75 m
from the ISDN NT1
on
Devices located more than 75 m
from the ISDN NT1
off
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