Asus ISDNLINK TA-200 User manual

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Chapter 1 Introduction
The proliferation of PCs and LANs with bandwidth intensive applications has generated
a powerful demand for high-speed connections. The worldwide standardization of
ISDN, combined in many countries with its growing availability and falling cost make it a
natural choice for enhancing data throughput.
ISDNLINK™ TA-200 terminal adapters provide high-performance solutions for Internet
access, file transfer, remote access service, and running existing modem
applications through the ISDN network.
ISDNLINK™TA-200 External Terminal Adapters
There are two ISDN interface options of ISDNLINK™ external TA (Terminal Adapter):
ST or U interface. If you purchased the ST interface terminal adapters (TA-200ST and
TA-200ST-D), you need an ISDN NT1 device to connect to the ISDN exchange (the
NT1 box should normally be provided by your phone company). If you purchased the
U interface terminal adapters (TA-200U and TA-200U-D), they can directly connect to
the ISDN switch. The TA-200ST and TA-200U devices support two a/b (POTS)
analog ports with connection through a supplied RJ-11 extension cable (in the UK
adapters are supplied for the standard BT connections). The TA-200ST-D and TA-
200U-D models provide the data port connection without a/b (POTS) ports.
All of the current analog devices, including telephone set, G3 fax, answering machine,
modem, and PBX trunk line can be connected to the a/b port (RJ-11 jack/POTS ports)1.
The data transmission rate can be up to 64 Kbps while a normal analog communication
is taking place on on-line, or up to 128 Kbps through Multilink PPP connection using
both digital lines.
Why ISDN?
The ISDN (Integrated Services Digital Network) is the standard for carrying both data
and voice simultaneously. ISDN BRI (Basic Rate Interface) line provides two B-
Channels for voice or data transmission. Each B-Channel can provide data
transmission of up to 64 Kbps. The ISDN network uses the same transmission lines
as the existing analog telephone network, but uses a digital signal and higher
bandwidth between the central office (telephone company) and the customer. ISDN is
not only much faster than standard modems; it also provides an extremely reliable and
stable digital connection.
1Please note that the POTS analogue ports on the TA200 device, in common with most PBX, terminal
adapters and fax switches, supply a reduced ring voltage. That is to say the ring voltage is lower than
that provided on a standard PSTN phone line. This does mean that in very rare circumstances some
analogue equipment may not be able to detect an incoming call.

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The ISDN network can set up a connection in about 3 seconds. This is much quicker
than the PSTN network. This feature alone can result in great timesaving in the long
term.
Why High Speed Analog Modems Can Not Compete With ISDN Digital
Connections?
“The high speed modem can run at 28.8 Kbps and will move data at ISDN-type speeds
when you consider data compression”. This assumes a noise-free telephone line and
that the data is easily compressed. Unfortunately, many image files cannot be
compressed easily, and many telephone lines are far from ideal. ISDN always
operates at its rated speed. Also, ISDN cards can also use data compression
technology to multiply its raw data transmission speed.
Telephone monopolies allowing, ISDN will inevitably replace the existing analog
telephone network. The conversion is being driven by applications such as
telecommuting, home working, remote LAN access, video conferencing and access to
the Internet. Today, ISDN is available almost everywhere so all users can should be
able to get the benefits from ISDN now.

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Chapter 2 Before Installation
Before installation of the ISDNLINK™ external TA-200 terminal adapter, you need to
check the package contents and ensure that you have an ISDN BRI line installed. If
you are using the TA-200ST(-D) device you will also require an NT1 termination device
(should be provided by your telephone company). If you intend to use the terminal
adapter for Internet access then you must also have an Internet access account from a
service provider.
You can now start to install and configure your ISDNLINK™ TA-200 terminal adapter.
Package Checklist
In your ISDNLINK™ external TA-200 package, you will find the following contents.
u
ISDNLINK™ terminal adapter 1 set
u
RJ-45 cable 1 piece (6 feet)
u
RJ-11 extension cable 1 piece (TA-200ST and TA-200U only)
u
RS-232 cable 1 piece
u
Power adapter 1 piece
u
Installation disk 1 piece
u
User’s manual 1 piece
u
RJ11-BTS adapter 2 piece phone adapter (UK only)
ISDN BRI Line
Before using the ISDNLINK™ TA-200 terminal adapter, you need to get an ISDN BRI
(Basic Rate Interface) line from your local telephone company. Sometimes, your ISP
may, upon your request, order an ISDN BRI line for you when you apply for an ISDN
Internet access account.
For the US you will also need to obtain from your ISDN telephone company details
concerning the ISDN central switch type and SPID (Service Profile Identifier) number.
What is SPID?
SPID stands for Service Profile ID. The SPID is applicable to the USA only. SPIDs
are a series of numbers that informs the central office switch (your local telephone
exchange) which services and features to provide to the ISDN device. The generic
SPID format comprises 14 digits. The first 10 digits are the main telephone number on
the terminal. The last 4 digits are dependent on the number of terminals on the

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interface and the services they support.
NT1 Connection
The ISDN U-loop is terminated by NT1 device at the customer premises. The
connection between the NT1 and Terminal Adapter (TA) is called point “T”. The NT1
drives a 4-conductor S/T-bus, which may be expanded, to 8 conductors to provide for
emergency power. If your ISDN product with a S/T outlet interface, you need an NT1
device connect to the ISDN switch. ISDNLINK™ST adapter needs an NT1 device to
connect to the ISDN switch, but ISDNLINK™U adapter does not require NT1 device.
In the UK, and in many European countries, your telephone company supplies an NT1
device. Therefore the ST adapter are required for these countries.
Internet Access Account
If you want to use ISDNLINK™TA-200 adapter to connect to the Internet, you must get
an Internet access account from an ISP (Internet Service Provider) around your
location. You must also confirm with your ISP that they support ISDN access (either
single channel 64K or 128K MLP).
Environment Setup
1. Please refer to the following pictures of the ST interface of the TA-200ST and TA-
200ST-D, and the U interface of the TA-200U terminal adapter for the appropriate
cable and device connections. You can get more detailed information from the
following section. TA-200ST
SERIAL PORT
OFF
S/T
ONAC IN TEL
AC inlet
Line 1
S/T
Line 2
U
NT--1
Analog line
AC/AC
Power Adapter
Terminators Setting

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TA-200ST-D
TA-200U
SERIAL PORT
OFF
S/T
ONAC IN
AC inlet
S/T
U
NT--1
AC/AC
Power Adapter
Terminators Setting
AC IN
SERIAL PORT
U
TEL
AC inlet
Line 1
AC/AC
Power Adapter
Line 2
Analog Line
U

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2. Terminator setup of ISDNLINK™“ST”interface terminal adapter
*Please jump to the next section (3.) if you are the user of U interface terminal
adapter, TA-200U or TA-200U-D.
The ISDN S/T interface can support up to 8 ISDN terminals and through a single
NT1 device for connection to the ISDN line. Only one ISDN S/T device should
have the terminator enabled. This is normally the ISDN terminal, which is the
furthest from NT1.
The ISDNLINK™ ST interface terminal adapters (TA-200ST and TA-200ST-D) have
DIP switches on the back of the device for the terminator setup. The default
setting of ISDNLINK™ TA is with the terminator enabled (The positions “1”and“2”of
DIP switch are set to “ON”). If there is any other ISDN device connected to the
NT1, and you do not require ISDNLINK™ TA as terminator, then please set the DIP
switch “1”and “2”to “OFF”.
3. Analog device connection
The TA-200ST (TA-200U) supports a/b (POTS) connection through RJ-11 jack
(adapters supplied in the UK). You can use this POTS port to connect to standard
analog phone devices. The RJ-11 extension cable supplied allows for two
analog devices to be simultaneously connected. Users can connect the
analog telephone set, G3 fax, modem, or answering machine directly on the TA
back plane or through RJ-11 extension cable with the standard RJ-11 connection.
In the UK an adapter is supplied to convert from the UK type 103 plug to the US
RJ-11 plug. The REN (Ringer Equivalence Number) drive capability or parallel
ring number is 3 for a/b analog interface connection2.
4. ISDN connection
Connect the ISDNLINK™ S/T interface TA and NT1 with the RJ-45 cable supplied
and connect the other end of the cable to the ISDN BRI line NT1 socket.
OR
If you have the U interface models (not in Europe) directly insert the RJ-45
connector cable into the ISDN BRI line and the other end of the cable into the RJ-
45 jack on the ISDNLINK™ U interface TA. Please note that even though the RJ-
45 connector has 8 pins and RJ-11 has 4 or 6 pins you can still plug the cable from
the wall jack with RJ-11 connector into RJ-45 jack on the ISDNLINK™ U interface
TA.
2Please note that the POTS analogue ports on the TA200 device, in common with most PBX, terminal
adapters and fax switches, supply a reduced ring voltage. That is to say the ring voltage is lower than
that provided on a standard PSTN phone line. This does mean that in very rare circumstances some
analogue equipment may not be able to detect an incoming call.

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5. Serial and power connection
Use the gray serial cable supplied to connect between the 9 pin D connector on the
back of the adapter to a spare serial port connector on the rear of your computer.
The supplied cable has both 9 pin and 25 pin connectors so it can be used with
either size connector on your PC. You should then also connect the power lead
from the power supply and then plug the power supply into your main power.
Now, your TA-200 adapter is ready for installation.

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Chapter 3 Installation
After you have setup your ISDN line as described in Chapter 2you can now, turn on
your computer power ON and start the driver installation. The ISDNLINK™ TA-200
terminal adapters are communicated with by the PC as a standard modem. This
means that the terminal adapter will operate on any computer or operating system,
which supports standard modem operation (including MAC, UNIX and PC). Below
shows installation of the TA-200 using Microsoft Windows 31, 95, and NT.
How to Configure TA-200
Your TA-200 adapter should have been supplied to you correctly setup for your
particular country and environment for immediate operation. There should be no need
to alter the configuration of the device. However if you need to alter some of the
advanced settings of the TA then basic setup and configuration can be done through
any terminal program including ProComm, Telex, HyperTerminal and so on. To alter
the setup then configure your terminal program with the following setting values.
Baud Rate: Up to 115200
Data Bit: 8
Parity Check: None
Stop Bit: 1
Flow Control: RTS/CTS
Then, on the terminal screen enter the AT command, AT@. A menu should then
appear allowing you to alter your ISDN TA settings. Please note, if you are familiar with
AT command set then you may refer to Chapter 4 for details on the necessary AT
commands to allow you to control these system parameters directly.
After entering AT@, the following screen is shown below.
*************************** ISDN Utility Program ******************************
* 1. Upgrade New Firmware *
* 2. Set System Parameter *
* 3. Set Protocol Parameter *
* ESC. Exit *
************************************************************************************
Please select one item :
Please see the appropriate section below which describes each menu item.

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Upgrade New Firmware
1. From time to time ASUSCOM may issue updated and improved versions of the TA-
200 firmware in the form of a data file. Using this option allows the end user to
upgrade the firmware using the supplied firmware file. Please note you must have
a valid firmware upgrade file before proceeding with this procedure. The user then
follows a simple procedure as described below.
Are you sure to upgrade the new firmware <Y/N>:_
If you press “Y”, this ISDN Utility Program will exit automatically and go into
upgrade procedure (2.). If you press “N”, then it returns to the ISDN Utility
Program.
2. The following prompts then appear.
ISDN TA upgrade procedure starts:
Erase current driver <Y/N>:_
If you press “Y”, then go to step (3.). If you press “N”, you will exit this upgrade
procedure and the current version number, selected protocol and speed of B
channel will be printed on the screen. If there is no driver (firmware) in flash
memory, it will inform you to proceed with the upgrade procedure.
3. Once the TA starts to erase the driver in flash memory the following messages are
displayed.
Erasing ISDN driver ……(wait about 5 seconds)
Finish erase procedure
Waiting for new firmware through ASCII mode transmission
If you want to exit upgrade procedure, press “$”to exit now.
From the terminal program now select transmission with ASCII mode (text mode) and
specify the new firmware file, e.g. if you use HyperTerminal in Windows 95 then choose
Transfer àSend Text File àand then input the file name and located directory of the
new firmware. During the file transmission the following message is shown.
Compare S0-record OK
Load Addr = ######
If you press “$”then the programme returns to step 2 to restart the upgrade
procedure.
4. After file is transferred completely, the following message is shown.
Compare S5-record OK
Finish upgrade procedure
Press “N”to exit this program and go into AT command mode.

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ISDN TA upgrade procedure starts:
Erase current driver <Y/N>:_
Press “N”to finish and exit upgrade procedure and then the version number, current
selected protocol and speed in B channel will be shown. If you press “Y”then the
program returns to step 2 to restart the upgrade procedure.
Set System Parameter
The system parameter screen is shown below.
***********************[ System Parameter Table ]************************
* SWITCH TYPE: *
* CODEC: STANDBY TIME: *
*===========Msn and Subaddress for Incoming call ======== *
* MSN (POTS-1): SAD(POTS-1): *
* MSN (POTS-2): SAD(POTS-2): *
* MSN (DATA-1): SAD(DATA-1): *
* MSN (DATA-2): SAD(DATA-2): *
* MSN (DATA-3): SAD(DATA-3): *
* MSN (DATA-4): SAD(DATA-4): *
*===========Msn and Subaddress for Outgoing call ========= *
* MSN (POTS-1): SAD(POTS-1): *
* MSN (POTS-2): SAD(POTS-2): *
* MSN (DATA): SAD(DATA): *
*=================================================== *
* SPID-1: SPID2: *
****************************************************************************** *
Esc key: Exit Ctrl-U key: move to previous item
Ctrl-W key: Save Ctrl-D key: move to next item
+, - key: Select next parameter Ctrl-L key: move cursor left
Ctrl-E key: Delete character Ctrl-R key: move cursor right
SWITCH TYPE Set the country or ISDN switch type, which is suitable for your local
telephone company (this setting should have been preset before the
adapter was supplied). Please also refer to the ATP command.
CODEC Countries that conform to the European telecommunication standard
should choose A-Law. Countries that follow the US
telecommunication standard should choose U-law. ATCODEC=0 for
A_Law and ATCODEC=1 for U_Law. Please refer to the ATCODEC
command.
STANDBY TIME A time period between dialing the last digit and sending a call request,
please just leave it as default. Please refer to the ATSTBY command.
MSN (Incoming) MSN parameter is used for ISDN systems supporting the MSN
(Multiple Subscriber Number) service. MSN service is supported by

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some of the European telephone companies. If you enter your MSN
number then the telephone number of caller will be required to match
the MSN value3. If there is no match then the appropriate line will not
answer or accept this incoming call. If you want to answer any
incoming calls, please leave it with blank. Please refer to the AT&ZI
command.
MSN (Outgoing) This Parameter is used for telling the ISDN exchange which number
made the call. This allows you to configure your system so that you
can get individual call charge bills for particular phone numbers.
Please refer to the AT&ZO command.
SPID SPID parameters are only required in some areas of the USA. Please
check with your telephone company if it is necessary. Please refer to
the ATSPID command.
SAD Abbreviation for Sub-ADdress.
Notes:
For an incoming data call the TA-200 will get the B channel protocol, called party
number and subaddress from the ISDN layer 3 SETUP packet. If there is no protocol
type assigned in the incoming SETUP packet the TA-200 will automatically detect the
protocol type (e.g. V.120, X.75, or HDLC, etc. - please refer to the AT&AP command).
If the TA-200 has the parameter values for MSN, Subaddress, and Protocol (please
refer to the AT&ZIr=m*n*p command), then these parameter value(s) will be used to
check the compatibility between the incoming SETUP packet’s value. If the MSN
values are matched (please refer AT&ZI? command), then TA-200 will accept the
incoming call, otherwise it will be rejected.
Set Protocol Parameter
The protocol parameter screen is shown as below.
************************[ Protocol Parameter Table ]*************************** *
*==================== Profile 0 ========================== *
* BIT TRANSPARENT -- Packet Size : 2048 *
* HDLC -- Packet Size : 1024 *
* V.120 -- Packet Size : 256 Window Size : 7 *
* X.75 (Transparent) -- Packet Size : 2048 Window Size : 7 *
* X.75 (T.90NL) -- Packet Size : 128 Window Size : 7 *
* X.75 (ISO8208) -- Packet Size : 1024 Window Size : 7 *
*==================== Profile 1 ========================== *
3In the UK, using ISDN2 or ISDN2e only the significant digits of the MSN number are sent to the
terminal adapter. Usually this is the last digit only e.g. if your ISDN phone number is 01234
496778 then the number to be entered in the MSN field is 8, not the full ISDN number. This
means that this line will only respond to your particular ISDN phone number that ends in 8. All
other numbers will be rejected. If your telecomms company sends down the last two digits for the
MSN number then you must enter both the last digits.

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-- Packet Size : 2048
* HDLC -- Packet *
* V.120 Size : 256 Window Size : 7
* X.75 (Transparent) -- Packet Window Size : 7 *
-- Packet Size : 128 *
* X.75 (ISO8208) Size : 1024 Window Size : 7
************************************************************************************ *
key: Exit
Ctrl-W
Ctrl-U key: move to previous item
key: move to next item
+, -
These protocols are used in the B channel and are used to set the packet size and
window size to meet the remote site configuration for connection compatibility or better
performance. For convenience you may store different settings into profiles 0 or 1.
You can select either of these profiles to speed up the configuration and usage.
Please refer to Chapter 4 for details of the AT command set and related information.
Installation for Windows 3.1 Environment
Installing and Configuring the Drivers
Run any terminal program such as Terminal, ProComm …and configure the parameters
as follows.
Baud Rate: Up to 115200
Data Bit: 8
Parity Check: None
Stop Bit: 1
Flow Control: RTS/CTS
If you need to alter the default settings then please refer to the above section (How to
Configure TA-200). Please note, the set values of Country or switch type, SPID0 and
SPID1, CODEC, MSN, and Outgoing telephone number will be stored in the adapter and
will not alter until customer changes them using the AT@ configuration screen.
Application Environment Setup
The ISDNLINK™ TA-200 terminal adapter provides operation using standard AT commands
through the COM port interface on you computer. It is therefore a simple matter to set up
existing application software to the appropriate COM ports to communicate with ISDNLINK™
TA-200 terminal adapter. If you use TRUMPET to connect to Internet, you should add the
AT command (ATB4) before TRUMPET makes a connection to Internet. You can edit the
login.cmd file and add this command (ATB4) for Async-to-Sync conversion. If you do not

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want to change the login.cmd file, you can dial into the ISP by manual login (enter ATB4 or
ATB41 first, and then ATD######).
Installation for Windows 95 Environment
The TA-200ST is a Windows 95 PnP compatible device so Windows 95 will prompt a
message and request you to install the driver when boot up. When requested insert
the installation disk into the floppy drive and select the option for Hardware Vendor
providing device driver. If your Windows 95 is OSR2 version, you will see the screen
shown below. Windows 95 will then automatically process the driver installation
procedure and install an “ISDN TA (Async. to Sync. PPP, 64K) Modem”for Internet
access. (Please note that this modem is really just a ‘standard’modem but modem
properties set to 115K baud and the initialization command ATB4 set in the advanced
settings. All the TA-200 modem drivers are basically the same but with different
initialization commands.)
Installing and Configuring the Drivers
1. Run any terminal program such as Terminal, ProComm …and configure the
parameters as follows.
Baud Rate: Up to 115200
Data Bit: 8
Parity Check: None
Stop Bit: 1
Flow Control: RTS/CTS
If you need to alter the default settings then please refer to the above section (How to
Configure TA-200). Please note, the set values of Country or switch type, SPID0
and SPID1, CODEC, MSN, and Outgoing telephone number will be stored in the
adapter and will not alter until the customer changes them using the AT@

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configuration screen.
2. Install ASUSCOM ISDN modems.
Please use the following steps to add proprietary virtual modems in Windows 95.
1) Select Start àSettings àControl panel àModems àAdd àCheck “do not
detect my modem, I will select it from a list”.
2) Click “Have Disk”, and browse to the modem sub-directory on the TA-200
installation diskette such as A:\MODEM. Select the mdmasuta.inf file.
3) Select the modem type that you require from the list shown (as described below)
and then click on Next, link this modem to the Com port which connects to the
TA-200 terminal adapter.
You should manually add in turn the modem types that you require. Each
modem will automatically issue the appropriate protocol command to
ISDNLINK™ TA-200 terminal adapter when you use it to make a connection.
The purpose of each modem type explained as follows:
lThe ISDN TA (Async to Sync PPP, 64K) or (Internet PPP, 64K) modem
is used for 64K Internet Access, and the protocol in B channel is Async.-to-
Sync. PPP conversion.
lThe ISDN TA (MultiLink PPP, 128K) or (Internet MLPPP, 128K) modem

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is used for 128K Internet Access, and the protocol in B channels is MultiLink
PPP.
lThe ISDN TA (MultiLink PPP with BOD, 128K) or (Internet MLPPP with
BOD, 128K) modem is used for 128K Internet Access, and the protocols in
B channels are MultiLink PPP with Bandwidth on Demand (BOD).
Through BOD capability, you can have a voice call while 2B channels are
used by MultiLink PPP Internet Access. The ISDN driver will then drop one
B channel and make the voice call through this B channel. After finished
the voice call, the ISDN driver will count the data flow used in the B channel
and bundle another B channel back if the usage rate is high.
Initially the ISDN driver will only make a single 64K connection. It will then
monitor the data traffic in this channel. If it is higher than the setting value
(default is 4K bytes/second) for a preset time (see the AT commands S53
and S54) then the driver will setup another 64K call for 128K connection.
Please refer to the ATS53 and ATS54 commands.
lThe ISDN TA (X.75 Transparent, 64K) modem is used for BBS Access
and file transfer, and the protocol in B channel is X.75 Transparent.
lThe ISDN TA (X.75 T.70NL, 64K) modem is used for BBS Access and file
transfer, and the protocols in the B channel are X.75 and T.70NL.
lThe ISDN TA (X.75 ISO8208, 64K) or (X.75 EFT, 64K) modem is used for
BBS Access and file transfer (EFT: Euro File Transfer), and the protocols in
the B channel are X.75 and ISO8208.
lThe ISDN TA (Universal-1, 64K) modem is the multi-purpose modem
but the protocol used in the B channel must be assigned through the ATBn
command (see the Modems/Advanced/ Extra Settings) before making a
connection. The Universal modem chooses the HDLC as the default
protocol in B channel.
Please now check (and modify if necessary) the default modem setting pertaining to
each of the ISDN modems. Select Start àSettings àControl panel àModems
àISDN modem, Properties àConnection, set Data bit to 8, Parity to None, and
Stop bits to 1. Select to use FIFO buffers in Port Settings tab and select flow
control, RTS/CTS in Advanced tab. ISDN modem, Properties àGeneral, set
Maximun speed to 115200.
a.

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Configure the Dial-Up Networking to Access Internet
Now you have correctly installed the relevant modem drivers you are ready to access
the Internet through the Windows 95 Dial-Up Networking. You can make a new
connection from the following steps.
Select Start àPrograms àAccessories àDial-Up Networking àMake New
Connection, then choose the appropriate configuration for 64K or 128K connection.
64K Access for Windows 95
1. Select the ISDN TA (Async to Sync PPP, 64K) MODEM as shown above.

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2. For the other fields such as Server Type, please input the values provided by your
ISP. Ensure that you enter a valid ISDN connection telephone number for your ISP,
remember that many ISP use a different number for normal modem and ISDN
access.
These setup procedures should give you connection speeds of 64Kbps.
128K/MLP Access for Windows 95
1. On the New Connection select the “ISDN TA (MultiLink PPP, 128K) Modem”or
“ISDN TA (MultiLink PPP with BOD, 128K) Modem”.
2. For the other fields such as Server Type, please input the values provided by your
ISP. Ensure that you enter a valid ISDN connection telephone number for your ISP,
remember that many ISP use the different number for normal modem and ISDN
access.
These setup procedures should give you connection speeds of 128Kbps. Before make
the 128K connection, please confirm that your ISP supports 128K or not. Some ISP
don’t or may levy an extra charge for this service.
Accessing the Outside World Using Dial-Up Networking
Now you have crated a dial-up connection you are now ready to make a connection with
your ISP server. Open Dial-Up Networking icon, and then select the name configured
above in the folder and click “Dial”. The system should then dial and connect to your
ISP at either 64K or 128K depending on how you setup the call. The server will verify
your login name, password, and register you on the server.
If you double-click the small icon of Dial-Up Networking at the right-bottom of the
Windows, the Dial-Up Networking Monitor shows your connection status including
connection speed, server type, etc. You are now ready to use the Internet tools to
access the Internet or network tool to access remote network.
If you find problems after connecting such as the line is dropped or you cannot access
the Internet, or you cannot access your remote network, please go back to check your
network settings with your ISP or network administrator.
Install the CAPI20 device drive
With the CAPI2 interface you can use any CAPI application such as RVS-COM, ZOC to
access TA-200 as if it were an internal ISDN card. You can therefore use the Soft-
G3Fax, Telephony, File Transfer …functions supplied by the RVS-COM package.
Before you install the CAPI20 device driver, the TA-200 should be correctly installed and
configured by Windows 95 as described above. Please refer Appendix B for further
information.

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Installation for Windows NT 4.0 Environment
Installing and Configuring the Drivers
1. Run any terminal program such as Terminal, ProComm …and configure the
parameters as follows.
Baud Rate: Up to 115200
Data Bit: 8
Parity Check: None
Stop Bit: 1
Flow Control: RTS/CTS
If you need to alter the default settings then please refer to the above section (How to
Configure TA-200). Please note, the set values of Country or switch type, SPID0 and
SPID1, CODEC, MSN, and Outgoing telephone number will be stored in the adapter
and will not alter until the customer changes them using the AT@ configuration screen.
2. Install ASUSCOM ISDN modems for Dial-up Networking and RAS.
Please use the following steps to add the virtual modems under Windows NT.
1) Select Start àSettings àControl panel àNetwork àServices àRemote
Access Service, Properties àAdd àInstall Modem àCheck “do not detect
my modem, I will select it from a list”. Click “Next”.
2) Click “Have Disk”, and browse to the modem sub-directory (A:\MODEM) on the

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TA-200 installation diskette. Select the mdmasuta.inf file.
3) Select the modem type that you require from the list shown (as described below)
and then click on Next, link this modem to the Com port which connects to TA-
200 terminal adapter.
4) After you install the desired modem, select the virtual modem in the RAS
Capable Devices field. Click “OK”.
5) Select this virtual modem and click the Configure Tab to set the parameter (Port
Usage) to this ISDN1port for “Dial out only”, “Receive calls only”, or “Dial out
and Receive calls”then click OK.

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6) If you check “Dial out only”and then click the network tab, you will get a window
like below, check the protocol you want. If you are going to access Internet,
check “TCP/IP”usually.
7) If you check “Receive calls”, or “Dial out and Receive calls”and then click the
network tab, you will get a window like below. Please check your ISP or
network administrator for TCP/IP settings. Also check that you have enabled,
“allow any authentication including clear text”, in the Security settings. Then
click OK.