Topex MobiLink ISDN2GSM User manual

USER’S MANUAL
2008

TOPEX MobiLink ISDN2GSM User`s Manual
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TOPEX is a group of Romanian companies, founded in 1990, by 10
enthusiastic engineers experienced in telecommunications. Its
activity is directed to the research, development and production of
telecom equipment as well as service for them.
TOPEX becomes very quick the most important supplier of IT&C
solutions for small to large companies as well as for
telecommunications operators and providers in Romania. The
company designs equipment for all existing mobile systems
(GSM/GPRS, CDMA/EVDO, HSDPA), including 3G technologies.
TOPEX is represented all over Romania by a wide network of local
distributors through which the promotion, administration and
product maintenance are running.
Due to our innovation power, authentic flexibility, real respect for
our partners and secure solutions that we provide TOPEX
extended its business worldwide. Currently TOPEX delivers its
products through its distributors to: Italy, France, Spain, Bulgaria,
Greece, Niger, Russia, UK, Republic of Moldova, Turkey, Holland,
etc.
In order to achieve effective and flawless manufacturing for its
products, TOPEX has carefully organized its Research and
Development Department along with its production facility. This
allows TOPEX to have maximum control of all the processes
involved in the complex operations related to high-technology
electronic manufacturing. At the present time, the Research and
Development Department counts 30 specialists and the trend is
ascending.
TOPEX also considered the training and the service as part of the
solutions it provides. Therefore, comprehensive trainings are
organized at Topex Factory, complimentary for the company’s
clients. Service is also provided via Internet, as all Topex solutions
are designed especially to allow this, at the lowest cost.
TOPEX has implemented the quality management system
according ISO9001 standard certified by SRAC since 1997,
respectively by IQNET since 2002. TOPEX become a sector
member of I.T.U. (International Telecommunication Union) since
2001.

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The main lines of products of our company are:
•GSM/GPRS/UMTS/HDSPA/CDMA interfaces (analog,
ISDN BRI and PRI, GSM gateway, broadband wireless
routers)
•SIM Servers;
•VoIP gateways ;
•Signaling converters and Protocol Translators (SS7, SIP,
H323);
•ATC Voice Communication Systems (custom systems for
special applications: air traffic control, railway dispatching
center)
•Softswitches and media gateways.
For more details please visit www.topex.ro

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CONGRATULATIONS!
Dear client,
Thank you for buying MobiLink ISDN 2 GSM and
congratulations for your excellent choice!
By purchasing MobiLink ISDN 2 GSM you have opted for:
9cutting down the costs of your cellular calls
9mobile-2-ISDN interface with LCR capabilities
9excellent quality of audio signal
9availability of SMS and data functions
9convenient, easy to use e-mail to SMS and SMS to e-mail
feature
9perfect compatibility to ISDN private branch exchanges (PBX)
9routing functions assured even when used as standalone unit
9full compatibility with GSM 900/1800 or 850/1900 networks
9saving of ports in your PBX exchange
9easy and quick installation and usage
9small investment, it pays itself of in the first month, then you
achieve important savings of phone bills

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WEEE Directive Compliance
WEEE Directive
This symbol applied on your product or on its
packaging means that this product fulfils the
WEEE Directive. The product shall not be
recycled as household waste; it will be disposed
separately as sorted waste.
Regarding to WEEE Directive the recycling EE
equipments must be accomplish separately in
purpose of natural resources preserving and to
avoid the occurring negative effects about
human health and environment. The acquired
product shall not be treated like household waste
at the end of its life and will be returned to
TOPEX Company at the address: ROMANIA,
Bucharest, Feleacu Street no 10, code 014186
or given to a specialized firm.
!Please do not dispose your TOPEX product as
unsorted waste (household waste), recycle it to
protect the environment. Separate the packages
according to waste disposal options and sort it
for recycling.
For supplementary information contact us to:
Phone: [phone] or www.topex.ro

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Several problems:
•Any call from a fixed phone to a mobile network includes
two kinds of charges: the fee of the wireless carrier
(operator) and the fee for the fixed telephony operator
•Additionally, the calls to your headquarters from the mobile
phones of your employees at remote locations are also
charged twice
•You have to pay several mobile subscriptions with high
tariff per call
•If you use a vocal mailbox, you must pay for checking your
messages
•When you have a ISDN exchange, the ISDN features and
services are not directly connected to the GSM network
•GSM phone bill may be difficult to control; you may end up
paying large costs for the calls performed.
One solution:
MobiLink ISDN 2 GSM achieves a direct link between the ISDN
phone exchange in your office and the wireless phone network.
Consequently, it is easier to connect and the costs of fixed-to–
mobile calls will be cut down by as much as 60%. You will avoid
telephone fees for the interconnection between GSM network and
the PSTN carrier. Also, calls coming from the cell phones of your
personnel out in the field will be cheaper as well.
Since all mobile calls are now brought together, you may use the
most convenient tariff rate of your GSM operator (low cost per call
for high volume of traffic).
When you connect your own voice mailbox to the ISDN 2 GSM
interface you no longer have to pay for listening to voice messages
or for reading the messages.
The MobiLink interface allows you to restrict outgoing calls to
certain phone numbers, so you won’t have to pay anymore for the
calls that you restricted.
By means of the MobiLink ISDN 2 GSM unit, you can use the ISDN
services together with the GSM services, it enables several kinds of
ISDN connection. You have a simple means to use conditioned and
unconditioned call forwarding. You easily can send and receive
SMS messages from your computer.
The device can also provide detailed records of time and duration
of outgoing calls, so you keep your phone costs under control.

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TABLE OF CONTENTS
TABLE OF CONTENTS.................................................................. 7
TABLE OF FIGURES...................................................................... 8
1. What is MobiLink ISDN 2 GSM? ........................................... 9
2. Package content.................................................................. 10
3. Installation ........................................................................... 12
3.1. Identifying the connectors.......................................... 12
3.2. Configuring the SIM cards ......................................... 13
3.3. Inserting the SIM cards .............................................. 14
3.4. Connecting the cables ............................................... 16
3.5. Installing the external antennas ................................. 18
3.6. Jumper settings ......................................................... 20
3.7. Bootloader enable...................................................... 20
3.8. Terminal resistors ...................................................... 21
3.9. Power up MobiLink ISDN 2 GSM............................... 22
3.10. Significance of LED indicators ................................... 23
3.11. Pinout for the connectors........................................... 24
3.12. Mounting the MobiLink ISDN 2 GSM equipment ....... 27
4. Installing the OAM program................................................. 29
5. Operation and modes of connection.................................... 30
5.1. Routing for least costs ............................................... 30
5.2. Four modes of connection ......................................... 31
5.2.1 MobiLink connected via NT to a TE junction of the
PABX 31
5.2.2 MobiLink connected via TE to NT local of PABX and
via NT to TE junction of the PABX....................................... 32
5.2.3 MobiLink connected to PBX on NT interface and to
public ISDN via TE interface ............................................... 33
5.2.4 MobiLink connected to PABX via TE only............. 34
5.2.5 Using several MobiLink ISDN 2 GSM units........... 35
6. Technical specifications ...................................................... 37
7. Operating environment........................................................ 38
8. Benefits ............................................................................... 40

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TABLE OF FIGURES
Figure 3-1 Identifying the connectors............................................ 12
Figure 3-2 Location of SIM slots ................................................... 14
Figure 3-3 Connecting the cables ................................................. 16
Figure 3-4 Connecting external antennas. .................................... 18
Figure 3-5 Location of jumpers. ................................................... 20
Figure 3-6 JP5 jumper location ..................................................... 21
Figure 3-7 Location of JAT1, JAT2, JAN1 and JAN2 jumpers ...... 21
Figure 3-8 Location of the LED status indicators .......................... 23
Figure 3-9 Serial connector........................................................... 24
Figure 3-10 Usage of SY connector.............................................. 27
Figure 3-11 Mounting MobiLink on a wall ..................................... 28
Figure 4-1 Configuring MobiLink via serial connection.................. 29
Figure 5-1 MobiLink connected to TE junction of PBX.................. 31
Figure 5-2 MobiLink connected to PBX with both NT and TE
interfaces............................................................................. 32
Figure 5-3 MobiLink inserted between PBX and public network ... 33
Figure 5-4 MobiLink connected to NT local of PBX ...................... 34
Figure 5-5 Cascading several MobiLink units ............................... 35
Figure 5-6 Location of JAT1, JAT2, JAN1 and JAN2 jumpers ...... 36
This manual is Revision F, June 2008 and contains 39 pages.

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1. What is MobiLink ISDN 2 GSM?
It is an advanced interface for your profit!
By interfacing between an ISDN phone exchange and the mobile
telephony network (GSM 900/1800 or 850/1900) it cuts down the
costs of fixed-to-GSM and GSM–to-fixed calls. ISDN 2 GSM was
designed to be connected to any ISDN phone exchange so it meets
standard ISDN PBX requirements.
It may be used as GSM interface for an ISDN a phone exchange.
Even when used as standalone unit with an ISDN phone set it can still
perform routing of the calls for minimum costs. Also, by means of a
terminal adapter it can be used with analog (standard) telephones or
with a payphone.
The unit works primary in voice mode, that is re-routes incoming
or outgoing calls through the corresponding wireless network. This
way you will pay just the cost of a mobile-to-mobile call inside the
same carrier network, instead of the cost of fixed-to-mobile call.
The interface enables several types kinds of ISDN connection
and may be used for services such as call forwarding (conditioned or
unconditioned), DISA and voice messages.
When connected to a computer, you may use the MobiLink ISDN
2 GSM equipment to receive and send out SMS.
By connecting MobiLink ISDN 2 GSM to an ISDN phone
exchange, all local extensions can make calls to GSM networks while
keeping down the costs. Also, when making a call the subscriber is no
longer subjected to RF radiations from the cell-phone. Also, the
external antennas can be located in a place for optimal reception
(higher intensity of the radio signal).
Since MobiLink ISDN 2 GSM can send billing pulses, you may
also use a public telephone (payphone) with it, by means of terminal
adapter.
Finally, ISDN 2 GSM may be used as small ISDN phone
exchange by itself, since it can interconnect up to 8 ISDN local
phones and perform automated routing of calls for minimum cost.
The unit includes the GSM modules, so it does not need
supplementary devices (such as a external GSM phones) to work. Its
two SIM cards allow routing the call through the corresponding GSM
operator, for least cost.
Its installation is simple; you just insert the SIM cards and plug in
the cables (serial configuration, ISDN lines, external antennas, power
adapter). This comes very useful for the SOHO (small office/ home
office) market.

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2. Package content
When you unpack the MobiLink ISDN 2 GSM unit from its
protective cardboard box you should identify the components
described in the table below. Pease ensure that you received the
suitable contents; also check that all components are accounted for
and that no damage has been sustained during the transport.
Item Image
Pcs/
Note
MobiLink ISDN 2
GSM equipment
1
Serial programming
cable for MobiLink
ISDN 2 GSM
1/*
Power supply adapter
12VDC / 2,08A
1
External antennas
1-2/ **
Wall mounting kit - 1 /***
CD with OAM
software 1/ ****
User’s manual -
Warranty certificate -

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Notes:
*) The package also contains two connecting cable for TE
and NT interfaces
**) Depending on what MobiLink ISDN 2 GSM model of
equipment it is (with one or two GSM modules) you will
have one or respectively two antennas.
***) The kit for mounting MobiLink on a wall includes
dowels, woodscrews, etc.
****) OAM software supplied with MobiLink (isdncfg)
includes functions for configuring (programming) the ISDN
to GSM interface, routing of calls, sending and receiving
SMS. It also includes online help with examples

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3. Installation
3.1. Identifying the connectors
The bottom of the case of MobiLink ISDN 2 GSM unit features all
the supply/voice/data connectors:
Figure 3-1 Identifying the connectors
□PWR – female connector, jack type, for the power supply
adapter
□SERIAL – female RJ-11 connector with special pin-out, for
the serial cable used for configuration (for the connection
to PC is used a DB9 muffle)
□NT – Network Termination for 4-wire ISDN phone line.
Connects MobiLink ISDN 2 GSM to the TE of the ISDN
PBX or the ISDN phone set (analog phone may be used
via terminal adapter)
□SY – synchronization, connections paralleled with TE slot.
Used for clock signal synchronization, when cascading
several ISDN 2 GSM units together
□TE – Terminal Equipment connector for ISDN is used for
connecting to an ISDN phone exchange or to the ISDN
public telephony network and also, for connecting more
than one MobiLink ISDN 2 GSM unit to the same PBX.
□The two FME connectors for the external antennas are
located on top of the MobiLink ISDN 2 GSM equipment,
while the slots for the SIM cards and their pushbuttons
can be found on the right side of the case, under the LED
indicators.

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3.2. Configuring the SIM cards
The SIM cards that will be used with MobiLink ISDN 2 GSM must
be activated by the corresponding GSM operator. Also, they must
be properly configured before insertion in the GSM slot of the
equipment. The configuration of the SIM cards is performed using a
GSM phone.
□Disable request for PIN code – If the “PIN Code
Request” option is disabled, you can insert any value in
the “Pin Code” field of the OAM program. When you enter
the correct PIN code, it will be stored in the equipment
memory and afterwards you need no more bother about
PIN code. The MobiLink unit must be connected with the
computer that runs the OAM program thru a serial
connection in order to modify the “PIN Code” (for more
details check the “User manual” for the isdncfg program).
□Disable GSM services – most GSM operators assure
several services (redirection of calls, vocal mailbox)
concerning treatment of incoming calls. These are very
useful in case you cell-phone is busy or disconnected; it is
advantageous to use the call forwarding features provided
by the GSM carrier. But when you use the MobiLink ISDN
2 GSM interface together a phone exchange it is generally
better to disable those services, because you perform
them locally with smaller costs.
□Disable Auto-redialing and Auto-answer – you
must disable these options, if they are provided by
your GSM operator.
□Turn off roaming - international roaming services allows
you to make calls with the same GSM subscription when
you travel in other countries (where the service provider
has signed a signed roaming contract with your GSM
operator). The roaming option should be disabled,
because MobiLink was designed to work with PBX or
ISDN phones in stationary applications. You won’t take it
in overseas trips! If roaming remains enabled, it is
possible that when the local GSM carrier is interrupted,
the ISDN 2 GSM interface will connect to a foreign mobile
operator and the costs of the calls will be much higher.

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Settings for configuration of the SIM cards
Description Option
Select “OFF” for “Dial again – Interval”. If this option exists
Select “OFF” for “Auto Answering” required
Select “OFF” for “Call Waiting” required
3.3. Inserting the SIM cards
The ISDN 2 GSM interface needs SIM cards for the corresponding
GSM operators.
Each SIM card must be inserted in the corresponding slot of the
MobiLink ISDN 2 GSM unit. Depending upon the equipment model,
it may feature one or two GSM modules, hence one or two slots for
SIM cards.
The slots for SIM cards are located on
the upper right side of the MobiLink
case, under the LED indicators. To
insert/ remove the SIM, use the
removable tray (SIM holder) which is
activated by a small yellow
pushbutton.
Figure 3-2 Location of SIM slots
Note:
To push the ejector button, because of its small size,
you may need to use a tool with a small, hard tip (keys,
pen, screwdriver or tweezers). Handle the SIM cards
with care!
WARNING!
Unplug the MobiLink unit from the main outlet before
insert or replace a SIM card!
For each of the SIM card, follow these steps:

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1. Press the little button to eject the SIM holder.
2. Pull out (extract) the tray (SIM holder)
3. Insert SIM card into the holder, as shown – with cut corner
upwards and with contacts facing you

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4. Push the holder tray with the SIM inside back into the
corresponding slot of the MobiLink unit
You should follow the steps described above also when you need
to replace the SIM cards already installed into MobiLink.
3.4. Connecting the cables
Connect the data, phone and power cables as shown in the
drawing below:
11
To other ISDN interfaces
Figure 3-3 Connecting the cables

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Use ISDN cables to connect the Topex unit to your ISDN PBX (or
other ISDN terminals). Connect the cables from your corresponding
ISDN device to the MobiLink unit. More detailed information on
correct connections can be found in chapter 4.2. “Modes of
connection”.
For each MobiLink ISDN interface, insert one end of the 4-wire
ISDN phone cable in the TE or NT connector of the MobiLink ISDN
2 GSM. The opposite other end of the cable must be connected to
the coresponding local or junction interface of the ISDN PBX or to
the ISDN phone. The pinout of RJ-45 connectors for TE and NT
interfaces is shown in tables at Chapter 3.9 “Pinout for connectors”
You should always select the individual NT, TE or SY connections
in accordance with chapter 4.2. „Modes of connection”. In order to
achive a good operation, you have to know the pattern of
connections required for the application (links required by the ISDN
phone exchange or telephone terminals).
Serial programming connection – To be able to adjust
configuration of your ISDN 2 GSM interface using of the OAM
program, you must connect your equipment to a PC. The
connection is performed by means of a special cable that connects
to the „SERIAL” slot of the MobiLink device. The serial connection
is also necessary for sending and receiving SMS messages from
your PC.
Insert the jack of the power supply adapter (shipped in the
MobiLink package) into the PWR connector. Do not yet plug the
adapter into the receptacle of the 230V ac mains outlet!
Note:
If you start up MobiLink ISDN 2 GSM and the antennas
are not connected, the transmitter of the GSM module
could be damaged.

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3.5. Installing the external antennas
MobiLink ISDN 2 GSM features two RF connectors on top, for
connecting the antennas for the wireless network. You may use:
□the wideband antenna supplied with the package, with cable
and magnetic base (see below characteristics)
□or other kinds of external antennas with higher gain or
directivity (Yagi), if the need arises.
The following table shows the main characteristics of the dual-band
stick antennas with magnetic base (currently supplied with the
MobiLink ISDN 2 GSM package).
Frequency bands
GSM 890-960 MHz
PCN 1710-1880 MHz
PCS 1850-1990 MHz
Gain 2 dBi
Polarization Vertical
Base Magnetic, 2,8cm
Cable Type RG174, length 2,5 m
Connector Female FME
The two antennas must be threaded to the FME male connectors
located on top of the MobiLink ISDN 2 GSM unit, as shown in the
following drawing.
Figure 3-4 Connecting external antennas.

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Plug the cable connector and tighten the flange lightly, by hand.
Do NOT use a spanner or screw key, which could damage the
antenna connectors!
The external antennas must be installed in a place with a good
strength of the GSM signal. The antenna has vertical polarization; it
must be placed in vertical or horizontal position, depending of the
local field condition.
If the SIM cards used are for different GSM operators, you may need
to place each antenna in a location with maximum strength of the
received signal from the respective GSM carrier.
MobiLink ISDN 2 GSM and its antennas must be located as far as
possible from equipment that is sensitive to electromagnetic
interferences (radios, audio or video appliances, computer monitor,
TV receivers etc). If you place the MobiLink interface or its antennas
too near radio, TV, or other sensitive appliances, their operation could
be affected.
Note1:
The antennas of the MobiLink ISDN 2 GSM interface
sends out RF energy so they should NOT be placed
very close to people. Since the GSM interface transmits
for longer periods of time, being used by several people
(most of the calls of local subscribers are routed through
it) the radiation will be accordingly higher than for a cell-
phone used only infrequently, by a single person.
Note2:
Remember to connect the antennas before
powering up MobiLink, to avoid damage to the
transmitters of the GSM modules

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3.6. Jumper settings
MobiLink ISDN 2 GSM features several jumpers located on the
printed circuit board, inside the plastic case of the equipment. These
jumpers control functions seldom accesses, so that in normal
operation you do not need to change the settings.
Figure 3-5 Location of jumpers.
3.7. Bootloader enable
Use
If an abnormal interruption occured in the loading of an image file, you
must use the JP5 jumper.
To fix this problem, you must set the jumper on the JP5 pins to force
the bootloader to start. In order to load a new image file please refer to
the isdncfg OAM manual.
Note:
Remember to take the jumper off pins JP5 before
resuming normal operation of the ISDN 2 GSM
equipment.