user manual nt1+2ab+v24

1 Introduction1.1 Description of the NT1+2a/b+V.24 The NT1+2a/b+V.24 is the ISDN network terminating unit at subscriber´s side NTBA with two independent analog interfaces and an addition

© ELCON Systemtechnik GmbH 2000

ISDN Network Terminating Unit with two analog interfaces and one data interface V.24 (RS232)

User manual

Poland 7111-1

U ~ B1 B2

NT1+2a/b+V.24

30 Pin assignment of RJ45 jacks at analog interfaces

V

Y

• Select the language and press the button “Products”.

• Choose “E0” and select “NT1+2a/b+V.24”

• Now press the button “Drivers and software for configuration”

• There you can find the language you need

Contents

1.3 System prerequisites for installation of the NT1+2a/b+V.24 4

3.6 Operation of the NT1+2a/b+V.24 in case of local power-supply

Annex D.5 List of NT1+Configurator commands (Analog port AT commands) 37

1 Introduction

1.1 Description of the NT1+2a/b+V.24

The NT1+2a/b+V.24 is the ISDN network terminating unit at subscriber´s side (NTBA) with

two independent analog interfaces and an additional V.24 data interface that enables direct

connection of PCs The two ISDN interfaces (S/T interfaces) allow direct connection of your

ISDN-capable terminals Apart from this, it is possible to link to the NT1+2a/b+V.24 up to

eight ISDN terminals by establishing an ISDN S bus If you have at your disposal analog

terminals, for example telephones, fax devices, modems or answering machines, you can

connect them directly to the analog interfaces at the NT1+2a/b+V.24 Your existing analog

devices are now able to provide you with a wide range of ISDN services, such as Call

Forwarding, Three Party Service and Calling Line Identification Presentation Terminal

adapters (TA) for connecting the analog terminals to the ISDN are no longer required The

data interface V.24 integrated in the device NT1+2a/b+V.24 allows you problem-free

connection of your PC, of which you simply have to link the network termination to a free

COM interface Using the software delivered you can open the door to a variety of

application fields, for instance internet, E-mail or computer-based fax transmission

Figure 1: View of the NT1+2a/b+V.24

This command starts new firmware previously stored in the NT1+2a/b+V.24

The firmware stored in the upper part of the flash memory will be loaded into the executablepart of the FlashProm and started

Starting includes a hardware reset of the NT1+2a/b+V.24

Note: If new functionality has been added, your configuration stored last may be lost

All parameters stored in non-volatile RAM will be loaded

QUIT, EXIT, GO Activate parameter changesActivates the actual parameter settings and leaves the configurator (without storing theparameter in non-volatile memory)

Resets the whole functionality of the NT1+2a/b+V.24 by a forced hardware reset (likePower off / on)

Stores the actual set of parameters in non-volatile memory

Carries out configuration of S/T-bus type

U ~ B1 B2

1st analog interface

2 nd analog interface

D.6 NT1+Configuration commands

Sets up factory default parameter setting

DEFA 0: Setup all parameters concerning data port

DEFA 1: Setup all parameters including ISDN protocol and MSN settings

(Setting of emergency allowance/priority interface)

In emergency mode only that interface is available that has been given priority The other

interfaces are disabled

When assigning emergency allowance to the chosen S/T interface, please keep in mind that

on S bus only one ISDN-terminal shall be activated as emergency terminal (see also

operating instructions for the ISDN terminal)

EMERGENCY=0 S/T is emergency interface

EMERGENCY=1 a/b1 is emergency interface

EMERGENCY=2 a/b2 is emergency interface

EMERGENCY=3 a/b1 or a/b2 is emergency interface (dynamic)

(The dynamic allocation of emergency activates thea/b interface which is the first to receive the incomingcall, resp to start the outgoing call The other a/binterface is switched-off.)

This command loads new firmware into the NT1+2a/b+V.24 without starting

The firmware will be stored into the unused upper part of the flash memory During the

uploading procedure the NT is working normally

1.2 The NT1+2a/b+V.24 in use

The user of the ELCON NT1+2a/b+V.24 can dispose of three different interface typesdesigned for connection of a variety of terminals These are:

• 1 the S/T interface

• 2 both a/b interfaces

• 3 the data interface V.24 (RS232)The S/T interface offers connection of two digital ISDN terminals via RJ45 connectors.Apart from this, you can establish an S bus, thus linking up to eight digital ISDN terminalswith the NT1+2a/b+V.24, whereby four of these terminals can be powered at the same timefrom the NT1+2a/b+V.24 via S bus

With help of the RJ 11 plug connector, one analog terminal can be directly connected to each

of both a/b interfaces Besides, establishing a hard-wired connection is also possible at theanalog interfaces

The data interface V.24 (RS232) allows direct connection of personal computers via their COM interface For establishing a data transmission line, a 9-pole SUB D-cable is used that

is linked at one side with a free COM interface at the computer, and at the other – with the

NT1+2a/b+V.24 For connection with a 25-pole SUB D COM port at the computer, anadapter DB 9 - DB 25 has to be used

The figure below shows some application fields of the NT1+2a/b+V.24

Figure 2: Sample application NT1+2a/b+V.24

DECT

analog digital

1.3 System prerequisites for installation of the NT1+2a/b+V.24

To offer usage of the whole range of services provided by the NT1+2a/b+V.24, the

following conditions should be fulfilled:

• For local power supply, an appropriate 230 VAC mains connection is required

• For connection to the ISDN you need an ISDN subscriber line (U) with line code

2B1Q and transfer protocol Euro ISDN DSS 1, provided by your

telecommunications network operator

Regarding the configuration of your NT1+2a/b+V.24, please ask your

telecommunications network operator.

• Only such devices that will meet the electric safety requirements according to EN

60950 and that are marked with the CE symbol shall be connected to the interfaces

of the NT1+2a/b+V.24

• The terminals shall be equipped with appropriate connectors, otherwise adequate

adapters can be used

• The terminals shall be connected only to the corresponding interfaces that have

been designed for them

Using the data interface V.24 requires below given additional conditions:

• IBM-compatible computer running at a clock frequency of > 75 MHz

• Operating memory 16 Mbyte

• Free hard disc memory 50 Mbyte

• CD-ROM disc drive

• Operating system Windows `95 or Windows `98

• Free serial interface (COM- Port) with interface module UART 16550 (Data

transfer rate > 115 kbps; better > 230 kbps)

Most of the personal computers manufactured in 1996 are already equipped with the

required serial interface module In case of questions or problems related to this topic, please

contact the manufacturer or seller of your computer

Please execute the following steps to update the NT1+2a/b+V.24 locally:

• Get a new software release for the NT1+2a/b+V.24 from your supplier and copy it

to your PC

• Start a terminal emulation on your PC with the capability to run an X-MODEMfile transfer (i.e HyperTerminal)

• Enter the AT command “AT**FWLOAD“.

• Wait for end of erasing the Flash-EPROM and the prompt to start your MODEM transfer

X-• Start the 1kX-MODEM file transfer (send file or upload) by selecting the Transfer/ Send File menu point in your terminal emulation and select the new software

• After completion you will get the information whether the software update endedsuccessfully or erroneously

• Give the NT1+2a/b+V.24 about 20 seconds to activate the new software

• Due to new functionality, the configuration setting stored last may be lost, pleasecheck this before using the device To set factory default values please use the

command "AT&F1".

Note: Due to an error it may happen that no firmware is active within the NT1 This will

be indicated by flashing of the LEDs L1, L2, B1, B2 (Bootloader active) To store

a new firmware correctly, you have to enter the command AT**FLASH and to load

a firmware using the XMODEM protocol as described above

Note: After altering one of the profile values marked by (#1) you have to enter the

additional commands SAVE and GO This is necessary to save and activate these

new parameters

D.5 List of NT1+Configurator commands (Analog port AT commands)

AB/1.APLUGSWITCH Enable plug switching

AB/2.APLUGSWITCH

After going on hook the line will not be disconnected for the time adjusted in

APLUGSWITCHTIME This makes it possible to change the analog devices.

AB/<n>.APLUGSWITCH=1 Enable plug switchingAB/<n>.APLUGSWITCH=0 Disable plug switching

AB/1.APLUGSWITCHTIME Plug switching time

AB/2.APLUGSWITCHTIME

AB/<n>.APLUGSWITCHTIME=1 Plug switching time

The value shall be entered in 50 ms steps

Note: If you are not sure, in which format the calling number will be presented with an

incoming call, please use the command ATV2 to identify the format of the calling number in

the RING message This number can be entered into the ACCTAB.

D.3 Subaddressing

With outgoing and incoming calls the transmission of subaddresses can be performed using

the ISDN supplementary service SUB The subaddress is transmitted transparently from the

calling party to the called party before the B-channel connection is established

Please note, that this ISDN service typically has to be enabled by the ISDN service provider

and may be charged additionally

The subaddress is separated from the called number by a slash “/“.

The functionality Subaddressing can be used with the dialling procedures AT-command set,

PAD X.3 and automatic call

Examples:

ATDisdnnumber[/subaddr]

isdnnumber Dialling called party number

subaddr Called subaddress

RING [<rn>[/subaddr]]

CONNECT [<rn>[/subaddr]]

rn Calling party number

subaddr Calling party subaddressThe own subaddress (calling subbaddress) can be setup using the configuration command

SUB.

Note: The subaddress can be entered additionally into all tables that contain

ISDN numbers for dialling or checking an ISDN address

D.4 Local software update

The NT1+2a/b+V.24 uses a Flash-EPROM for software updates to store the operational

software This software can be updated from a locally connected PC via the COM port or via

a remote configuration connection

1.4 Safety precautions

Before installing and commissioning the NT1+2a/b+V.24, please read these operatinginstructions thoroughly These instructions will help you to use the device to its full extentand to avoid damage resulting from improper application

• The NT1+2a/b+V.24 has been manufactured according to state-of-the-art technologyand corresponds to well-accepted safety regulations

• Please make sure that the device is operated only in faultless condition and that theseoperating instructions are observed

• Only authorized specialists are allowed to operate the NT1+2a/b+V.24

• After connecting the device, install the right supply voltage (→ Technical data)!

• The NT1+2a/b+V.24 has no individual component for interrupting the supplyvoltage The device must be placed within 1.5 meters from the mains socket

• Care should be taken when installing the power supply and the connection cables toavoid the risk of accidents (such as tripping over the cables)

• The device shall be operated only within a temperature range from 0 °C to +40 °C

• In case of device failure please contact the manufacturer or the representative in yourvicinity

Apart from these safety precautions, installation and operation instructions are also given inthe respective chapters

We reserve the right to modify the contents of these operating instructions

2 Mounting

2.1 Scope of delivery

• NT1+2a/b+V.24 – ISDN network terminating unit with two analog interfaces and

one data interface V.24 (RS232)

• Mounting accessories (dowels, screws, drilling template)

• Mounting and operating instruction

• Software for configuration of the NT1+2a/b+V.24 (optional)

• Floppy disk with installation software Windows 95/98 and Windows NT (optional)

• V.24 Standard modem cable SUB-D 9-pole (1:1) (optional)

• V.24 COM port adapter DB 9 - DB 25 (optional)

2.2 Selection of mounting site / Fastening the device NT1+2a/b+V.24

The NT1+2a/b+V.24 is designed for wall mounting Select an appropriate mounting spot for

the device near to the U-subscriber line from your network operator Apart from this, the

device has to be installed near the 230 V mains socket, since the power plug represents the

link to the supply mains Make sure that the power plug is always easy accessible The cable

length is 1.5 m Please make sure that there are no other concealed supply lines (e.g power,

water, gas, telecommunication supply lines) and that the device is not exposed to direct

insolation Apart from this, the device shall be protected from moisture

The hints required for mounting the device are to be found directly on the drilling template

Due to the chosen mounting holes it may be necessary to remove the cover Before removing

the cover, make sure that the circuit is dead To remove the cover, press the locking pins on

both sides of the device inwards and at the same time remove the cover In case you want to

implement hardwiring of your terminals, connect the cables before closing the device

Mounting of the cover shall be performed in reverse way, slipping on the upper cover part

until the locking pins will audibly snap into place

Important note: After mounting and cabling the device do not forget to replace the cover

again Operating the device without protective cover is not allowed, due

to the danger of voltage-carrying parts being contacted by mistake

The active configuration will be reset to the stored configuration

This must be the last command in an AT command string

ATZ

D.2 ISDN access control

Using these commands you can setup a table, to allow only definite callers to get aconnection to the NT1

If this list is empty (default) or one entry is set to star (*), any incoming call is allowed

Every incoming call that does not fit to one of the entries of ACCTAB will be ignored The

received calling party number is compared to every entry beginning at the last digit and isstopped when the shorter number is completely compared

acctabx nn/ss set entry number x to ISDN number nn and subaddress ss acctabx - clear entry number x

acctabx * allow all incoming calls to be accepted

acctabx show entry number x

acctab show all entries

Maximum number of entries = 5; x = 1 5

Maximum length of ISDN number = 20 digitsMaximum length of subaddress = 20 digits

The ISDN number nn can contain wildcards:

* : represents one or more digits

? : represents exactly one digit

Note: If a subaddress is set, the received calling subaddress must be identical with

the subaddress that has been set

Examples: acctab1 1234567890 accept only specified number

acctab2 *456* accept all numbers with 456 somewhere in the middleacctab3 ?2345678?? accept all number with 2345678 in the middle

peceeded by one digit and followed by two digits.acctab2 *1234/987 accept all numbers that end with 1234 and have the

subaddress 987acctab3 * accept all incoming calls without subaddressacctab3 - clear entry no 3

H Disconnect

Disconnects existing ISDN data connection after issuing the Escape sequence

ATH

Displays different information about version number and settings:

ATI Returns the "Modem"-type; name of the terminal adapter

(“NT1+2a/b+V.24“)ATI1 Returns internal checksum (“64“)

ATI2 Returns “OK“

ATI3 Returns version string: "NT1 5.xy.z0"

ATI4 Returns manufacturer´s name: "ELCON Systemtechnik GmbH"

ATI5 Returns ISDN-selected protocol: "0 - DSS1"

ATI6 Returns copyright string: "(c) Copyright ELCON Systemtechnik

GmbH"

ATI9 Returns plug-and-play ID string

ATI99 Returns software creation date

If the NT1+2a/b+V.24 is in the command mode after issuing an escape sequence out of an

existing connection, ATO brings the NT1+2a/b+V.24 back to the data phase This must be

the last command in AT string

ATO

The active configuration will be stored in non-volatile memory

AT&W

2.3 Connection facilities and realization of cable coupling

Below figure shows the connecting sockets of the NT1+2a/b+V.24 with the correspondingdesignation At the cable bushing points the inside device is equipped with terminal blocksfor hard wiring (except for the power supply connection) These terminal blocks areaccessible after opening the casing cover

Figure 3: Connection facilities

As shown in above figure, three different types of interfaces for terminal connection areavailable to the user of the ELCON NT1+2a/b+V.24 These are:

• the S/T interface

• both a/b interfaces

• the data interface V.24 (RS232)The S/T interface offers connection of two digital ISDN terminals via RJ45 connectors.Apart from this, you can establish an S bus, thus linking up to eight digital ISDN terminalswith the NT1+2a/b+V.24, whereby four of these terminals can be powered at the same timefrom the NT1+2a/b+V.24 via S bus When establishing the S bus, keep in mind to terminate

the bus by terminating resistors (100 Ω) (see below scheme) For establishing the S bus inY-configuration, both ends of the bus shall be terminated by terminating resistors

The exact pin assignment of the RJ45 connectors is described in Annex A

Furthermore, it shall be mentioned that the S/T interface, resp the S bus, can be operated intwo different configurations: The first configuration type is the so-called „short passive bus“,and the other – the „extended passive bus“ with the „point-to-point“ configuration Thetransmission range that can be reached with either of above mentioned variants, as well asthe form of the two bus types, are presented in below figure

Supply cord ISDN U interface S/T interface RJ 45

Figure 4: Short passive bus

Figure 5: Y configuration

Figure 6: Extended passive bus

Figure 7: Point-to-point configuration

Dials the number (D for Dial) The dial modifiers "W", ">", "T", ";", "@" can be freelyinserted in the dial string; they have no influence on the dial procedure of theNT1+2a/b+V.24

This must be the last command in an AT command string

Any character input during the NT1 dialling procedure will cancel the dialling

ATD<CALLEDnumber>[/<subaddr>]

CALLEDnumber: ISDN call number for a dialled B channel connection or

X.25 number for X.31 D channel

subaddr dialled subaddressATDL Dial the last dialled numberNote 1: To setup the own subaddress see configuration command SUB.

Note 2: Adding an "e" to CALLEDnumber indicates that a connection to the

internal remote access of a NT1+2a/b+V.24 shall be performed, the

protocol X.75 (ATB10) has to be used.

Selects the local echo in command mode

ATE No local echo

ATE1 Local echo on in command phase (default)

Factory default will be loaded, ISDN protocol setting and MSN´s will not be overwritten

(For storing in non-volatile memory please use the command AT&W).

AT&F Setup all parameters concerning data portAT&F1 Setup all parameters including ISDN protocol and MSN settings

NT1+2a/b+V.24T

R

TR

R

TR

R

TR

R

TR

The parameter settings of the NT1+2a/b+V.24 obtained when using the AT commands can

be permanently stored (AT&W) and are not lost when resetting or by leaving the AT

command mode

To enter the AT command mode during an active data connection, use the following

sequence ("Escape sequence"):

at least 1 sec pause <+><+><+> 1 sec pause

The time gap between all three plus signs shall not exceed 1 sec

The escape sequence is transmitted transparently to the remote device

Supported ISDN and NT specific AT commands

This command repeats the commands of the last entered command string

Note: No prefix AT is required.

A/

With this command you can accept an incoming call if automatic call acceptance is not set

(Register S0 = 0) An incoming call is displayed by the message “RING“ or the code “2“

This must be the last command in an AT command sequence

ATA

Transmission protocol for data transfer

With help of RJ 11 plug connector, one analog terminal can be directly connected to each ofboth a/b interfaces Besides, establishing a hard-wired connection is also possible at theanalog interfaces However, the length of such a hard-wired line shall not exceed 250 m.You will find the exact pin assignment of the RJ 11 connectors in Annex B

The data interface V.24 (RS232) allows direct connection of personal computers via theirCOM interface For establishing a data transmission a 9-pole SUB D-cable is used that is

linked at one side with a free COM interface at the computer, and at the other – with the

NT1+2a/b+V.24 A „1 to 1“ modem cable is recommended to be used as data transmissioncable The cable shall be fixed to the devices by appropriate screws and protected fromtensile loads The pin assignment at the connectors is shown in the Annex C

Attention: The cables for connecting the terminals to the NT1+2a/b+V.24 interfaces

shall be protected against overvoltage, since this may cause damage to theterminals connected or the NT1+2a/b+V.24!

• Your ISDN terminals can be connected to the corresponding jacks (S/T) by means

of the RJ45-plugs Alternatively, you can establish an S bus to which the terminalscan be linked

• Now plug-in your mains plug in a 230 VAC power supply socket YourNT1+2a/b+V.24 with all terminals connected is now ready for operation, offeringthe manufacturer´s default settings

• If you want, you can connect your PC with the NT1+2a/b+V.24 as describedabove