Vidicode V-Tap ISDN BRI User manual

V-Tap ISDN BRI Manual EN v2.6 Dec 2018 © 2017-2018 Vidicode 1
V-Tap ISDN BRI
Manual
v2.6

V-Tap ISDN BRI Manual EN v2.6 Dec 2018 © 2017-2018 Vidicode 2
Contents
1Introduction....................................................................4
2Getting started...............................................................5
2.1 Hardware installation.......................................................5
2.2 Software installation ........................................................6
2.2.1 Call Recorder Apresa.............................................................. 6
2.2.2 Call Recorder VoIP on the PC ................................................. 7
2.3 Checklist for Tunnel connection ......................................8
3Web interface and Settings ...........................................9
3.1 IP address...........................................................................9
3.2 Web interface..................................................................10
3.3 Settings............................................................................12
3.3.1 General network settings .................................................... 12
3.3.2 Tunnel settings..................................................................... 14
3.3.3 Wi-Fi settings........................................................................ 16
3.3.4 FTP & Web settings .............................................................. 17
3.3.5 Telnet setting ....................................................................... 18
3.3.6 NTP settings.......................................................................... 19
3.3.7 Date and Time settings........................................................ 20
3.3.8 Button Mode setting............................................................ 21
3.3.9 ISDN settings ........................................................................ 22
3.3.10 SD Card settings ................................................................... 23
3.3.11 Special network settings ..................................................... 25
3.3.12 App Special Flags ................................................................. 26
3.3.13 Licenses & Versions .............................................................. 27
4LED’s .............................................................................28
4.1 Red Error LED ..................................................................28
4.2 Green Link LED................................................................29
4.3 Blue Data LED..................................................................30
4.4 Amber SD-Power LED .....................................................30

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5Button functions ..........................................................31
5.1 Start & Stop recording....................................................31
5.2 Remove SD Card safely ..................................................31
5.3 Enable DHCP temporary.................................................32
5.4Show IP address ..............................................................32
5.5 Factory settings...............................................................33
5.6 Default IP address...........................................................33
5.7 Firmware update ............................................................34
6Number-list (Black- or White-list) ................................35
7Remote control with UDP commands .........................36
8Revision History ...........................................................38
9Acknowledgements .....................................................39
9.1 Privacy..............................................................................39
9.2 Liability ............................................................................39

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1Introduction
The V-Tap ISDN BRI is a hardware and software solution for the
recording of telephone calls. The supplied hardware unit can record the
audio from an ISDN-2 BRI line. The recorded data is stored digitally onto
an SD card and is sent optionally over the network, in which case the
data is wrapped into a special Tunnel-format that can be received by the
Call Recorder Apresa (running on Linux) or by the Call Recorder VoIP
software (running on a Windows PC). The external Apresa recorder or
CR-VoIP software can both interpret the Tunnel-format and make
playable audio files from it, together with the original date, time and
call number information (meta data).
The use of an SD card is mandatory and must be FAT32 formatted. The
recorded data is stored in WAV file format on the card. Depending on
whether a Tunnel has been defined or not, the files are sent over the
network or can be read later by the CR-VoIP software.
Note that the V-Tap ISDN BRI does not produce WAV files or store any
data on the SD card, without a Channel License for Apresa or PC.
The V-Tap ISDN BRI can operate completely stand alone and when the
capacity of the SD card is big enough, it can store data for months or
even years.
Connection to the V-Tap BRI is made with a network cable or by using
Wi-Fi, when available. The web interface can be accessed by using a
browser. The LAN cable can be connected to any of the two Ethernet
ports. Both ports (100 Mbps) are equal and part of a build-in switch.
The V-Tap ISDN BRI is a member of a family of compatible products that
can be used to create all sorts of Call Recording solutions. There are
V-Taps for VoIP, Analog and ISDN telephony, there is an App for mobile
recording and all these products communicate with the Apresa
Corporate recording solution or Apresa cloud-based recording.
NOTE 1: The V-Tap ISDN BRI needs to be powered through USB and a
FAT32 formatted SD card must be inserted.
NOTE 2: The V-Tap ISDN BRI needs at least 1 Channel License for Apresa
or PC, else no calls are stored on the SD card.

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2Getting started
2.1 Hardware installation
The V-Tap ISDN BRI is easy to setup. The following steps are involved:
•Connect the ISDN-2 line and phone to port 1 and 2 of the V-Tap.
•Insert an SD card (up to 32 GB, FAT32 formatted).
•Connect the USB to the V-Tap for power.
•Connect the local network. Not needed when Wi-Fi is used.
•Access the settings in the web interface by using a browser.

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2.2 Software installation
External software is needed to extract the recorded calls from the
Tunnel data that is produced by the V-Tap ISDN. Also, when the calls are
first stored on an SD card, external software is needed to interpret this
data from the card, especially when the data is encrypted.
The Tunnel data stream, coming from the V-Tap, can be send to the Call
Recorder Apresa or the Call Recorder VoIP software.
NOTE:
The V-Tap needs at least one Apresa or PC upload-channel license key
before the Apresa or CR-VoIP software can record your calls.
2.2.1 Call Recorder Apresa
The Call Recorder Apresa is recorder software running on the Linux
operating system. The Apresa can receive Tunnel data from the V-Tap,
convert this data into audio files and store these into its own database.
The Apresa can receive multiple data streams from many V-Tap units
simultaneously. In that case the recordings of different locations are
centrally stored in one database.
To setup the Apresa to act as a Tunnel server for a V-Tap, go to
System settings, Network tab and enable “V-Tap” as is shown below:
NOTE1: Apresa’s IP address is the “Tunnel Server Address” in the V-Tap.
NOTE2: Be sure the Encryption password is the same as in the V-Tap unit.

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2.2.2 Call Recorder VoIP on the PC
The Call Recorder VoIP software for the PC can also receive Tunnel data
from the V-Tap ISDN, convert this data into audio files and store the files
into its own database. The CR-VoIP software can also receive multiple
data streams from different V-Tap units simultaneously.
To setup the CR-VoIP software to accept connections from a V-Tap, go to
Options, Setup, Recording tab and enable as is shown below:
NOTE1: The PC’s IP address is the “Tunnel Server Address” in the V-Tap.
NOTE2: Be sure that the PC’s firewall is open for TCP port 2016, the
default “Tunnel Destination Port” in the V-Tap unit.
NOTE3: Be sure the Encryption password is the same as the
“Encryption Password” in the V-Tap unit.
NOTE4: The CR-VoIP software does not need licenses to receive from
the V-Tap unit.
The Call Recorder VoIP software for the PC has its own manual and is
therefore further not described in this manual.

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2.3 Checklist for Tunnel connection
A connection between V-Tap and Apresa or PC software is needed to
get the recorded data automatically into a user accessible database.
The following checklist can be used to setup this Tunnel connection:
1) Install the Hardware.
2) Install the Apresa or PC Software and enable V-Tap connections.
3) Assign an IP address to the V-Tap and open the Settings page.
4) The “Tunnel Server Address”must be filled in with the IP
address or name of the Apresa recorder or the PC.
5) Any firewall must be setup to let pass TCP port 2016, the default
“Tunnel Destination Port”.
6) The Tunnel connection to the Apresa or PC software is stable
when the GREEN LED is steady, not blinking!
7) For first tests, better turn off “Tunnel Data Encryption”.
Otherwise, be sure that the Encryption password is the same for
both V-Tap and Tunnel server.
8) When data is stored during a call then the BLUE LED blinks.
9) To see if the Apresa or PC receives something from the V-Tap, it
is possible to make a network trace for test purposes.
On the PC go to menu Action and select ‘Network trace’. The
'tunneltrace.pcap' file can be read afterwards with Wireshark.
10) The SD card in the V-Tap should contain “.WAV” files.
The SD card can be read by the PC software in menu File and
‘Import from V-Tap’.

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3Web interface and Settings
There are two ways to access the web interface of the V-Tap:
1) When a Wi-Fi module is available and enabled on the V-Tap:
Searching for Wi-Fi apparatus on a mobile phone or laptop, will
show the name “V-Tap_......”. The last 6 digits of the name are
the last digits of the MAC address. The first 6 digits of the MAC
address are always 000349. The complete 12 digits are used as the
default Wi-Fi password.
2) Connect a network cable to one of the network ports on the unit.
The other side of the cable can be connected to a LAN or directly
to a PC. There is no need to use a cross-cable.
3.1 IP address
By default, the V-Tap unit listens to the IP address 192.168.55.66 and
DHCP is disabled for the cable. This IP address can be entered directly in
the address bar of your browser.
In the case of using Wi-Fi, the IP address 192.168.55.66 always works as
soon as the connection is made over the air. To connect, you need to
enter the Wi-Fi password first, which is the 12 digits MAC address of the
unit, also found on the bottom of the case.
In the case of using a cable, entering the IP address only works when
your PC has an IP address that lies in the same range as the IP address of
the V-Tap. The IP address of your PC must therefore lie in the range
192.168.55.0 till 192.168.55.255 and the IP mask should be 255.255.255.0.
Default IP address: 192.168.55.66
Default Web User name: admin
Default Web Password: admin
Default Wi-Fi Password: 000349xxxxxx [12 digits MAC address]
DHCP on the cable can be enabled temporary by pressing the button for
1 second. The LED’s will flash shortly as soon as an IP address is obtained,
and the V-Tap is then reachable on that address.
See also Enable DHCP temporary and Show IP address.
It is also possible to set a new fixed IP address or enable DHCP for the
cable by using an SD card: ( see next page )

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Defining a fixed IP address with an SD card:
. Create a text file on your PC, named “IP.TXT”.
. The first line in this file must hold the IP address.
. The second line is optional and can hold the IP mask.
. Copy “IP.TXT” to the root directory of an SD card.
. Insert the SD card into the V-Tap unit.
. The IP address has now changed and can be accessed.
. The file “IP.TXT” is deleted from the card by the V-Tap.
. Note: The IP address 0.0.0.0 enables DHCP on the V-Tap.
3.2 Web interface
Entering the IP address in your browser will show the following screen:
Now enter “admin” for the User name and “admin” for the Password,
then press the Login button and the Settings menu appears ( see picture
on the next page ).
(The settings on the next page are not the default settings, but just an example.)

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By pressing the Save & Logout button, the settings are sent to the V-Tap
unit. Any ongoing recording is stopped, the file on SD card is closed, and
after a few seconds the new settings are activated.

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3.3 Settings
The settings are divided into groups that are described in the following
paragraphs.
3.3.1 General network settings
Device Name
This field can be filled in with any name you like and is used for
remote recognition of the V-Tap unit. The name is shown in the web
interface and after connecting with ftp or telnet. The name is also
shown when searching for Wi-Fi apparatus on your mobile or laptop.
The maximum length is 30 characters.
The single and double quotation marks (‘ and “) cannot be used !
DHCP Server
Default, the DHCP feature is disabled and the V-Tap unit has a fixed
IP address. When a DHCP server is available on the network, the IP
address, Subnet Mask, Gateway and DNS addresses are automatically
assigned. Without DHCP you must enter them manually.
With default settings, DHCP can be enabled temporary by pressing
the button for 1 second, see Enable DHCP temporary.
The DHCP setting is not used for Wi-Fi connections.
Device IP Address
As part of the network, the V-Tap needs an IP address. In case a
DHCP server is used, the DHCP server will assign the V-Tap an IP
address. In case a DHCP server is not used, a static IP address must be
filled in. The default static address is “192.168.55.66”.
Subnet Mask
The subnet mask is used for so called ‘subnetting’, a way to logically
divide one network into more networks. The logical AND of the IP
address with the mask must be the same for the device and the
computer connecting to it. The default mask is “255.255.255.0”.
In case DHCP is used, the mask is automatically obtained.

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Gateway Address
The Gateway address is used by the V-Tap unit when access outside
the local network (LAN) is required. This sort of access can be needed
by the Tunnel protocol for streaming to a remote computer and/or
by the NTP feature for obtaining the current date and time.
In case DHCP is used, the gateway address is automatically obtained.
DNS Server Address
The Domain Name Service (DNS) is needed in case a name is entered
instead of an IP address for the Tunnel server and/or the NTP server.
The default DNS address 8.8.8.8 is the Google Public DNS, but the
Gateway must be defined also before this address is reachable.
In case DHCP is used, the DNS address is automatically obtained.

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3.3.2 Tunnel settings
Tunnel Server Address
Here you fill in the IP address or host name of the Tunnel server that
is going to receive the streamed data coming from the V-Tap ISDN.
Leaving this field empty will disable the Tunnel function all together,
in which case the V-Tap unit must store its data onto an SD card.
The receiving server can be an Apresa recorder or a PC running the
Call Recorder VoIP software. In both cases, the V-Tap needs a license
to allow Tunnel data to be uploaded/streamed to the Tunnel server.
Without a license, the receiving server will discard the Tunnel data.
Tunnel Destination Port
The Tunnel protocol is based on the TCP protocol and that involves a
Destination Port and a Source Port. Both are numbers from 0 till
65535 that are included in each packet and are very important for
the receiving end of the Tunnel data. The receiving Tunnel server
must be setup to look for the same port number as is installed in this
Tunnel Destination Port.
Not all TCP port numbers are available for tunnelling, because some
are officially used by other protocols. For example, port 80 is used for
HTTP in all browsers to communicate over the World Wide Web. A
list of known port numbers can be found on the internet.
The default port number 2016 is not an official port and can be used
safely for this Tunnel protocol. The only drawback that comes by
using an unknown port is, that a firewall will block this port. For that
reason, it is important that any firewall that is passed by the Tunnel
stream must be setup right.
Firewalls must have a rule to let through TCP port 2016.
Tunnel Source Port
The Source Port also has an important role in the Tunnel protocol.
The default number 0 selects randomly a port number between
49152 and 65535. This range of port numbers is recommended by
IANA to be used for dynamic ports.

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Once a connection has been established between the V-Tap and the
receiving Tunnel server, the chosen port number is kept active for
the duration of the communication session. When connection is lost
for some reason, a new source port is chosen for the next
connection. This ensures fast reconnection, because the TCP protocol
does not allow the same source port to be used again within a short
time. After an OS specific timeout of normally a few minutes, the
port numbers become available again for reuse.
Tunnel Connect Timeout
This timeout is used when the V-Tap tries to connect to the Tunnel
server. The default 22 seconds is enough to send 4 requests. If no
reply comes from the remote side within this time, the V-Tap starts
trying again after a few seconds with a new source port number.
Storage onto SD card just continues and is not interrupted by any
connection or disconnection of the Tunnel.
Tunnel Idle Timeout
This timeout is used to disconnect the active tunnel to the server,
only when no data must be sent anymore. Default, the idle-timeout
is disabled and the tunnel stays connected forever.
The timeout is added for (yet) unknown situations where it is not
allowed to have an open TCP connection for a long time.
Tunnel Data Encryption
The data inside the Tunnel protocol is sent encrypted over the
network. The used method is AES with a 256-bit Cryptographic Key.
For privacy reasons it is advised to leave the encryption enabled.
Encryption Password
This parameter is used for the encryption of the Tunnel data and the
file on SD card (see below). The receiving side of the Tunnel data, the
Apresa or CR-VoIP software, must use the same password. Leaving
the password empty is still doing the encryption but is less secure.
The single and double quotation marks (‘ and “) cannot be used !

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3.3.3 Wi-Fi settings
The Wi-Fi module in the V-Tap may not be enabled by default. To
enable, enter “FACTORY WIFI” in the App Special Flags field. After
pressing Save and log in again, the below 3 parameters become visible.
Once Wi-Fi is enabled, you can use your mobile phone or a laptop to
connect to the V-Tap over the air to access the settings. The following
steps must be taken:
•Search for Wi-Fi apparatus on your smartphone or laptop, the device
name “V-Tap_BRI_xxxxxx” is then shown.
•Select it and when asked for a password, use the 12 digits MAC
address of the unit, found on the bottom of the case. The first 6
digits of the MAC are always 000349 and the last 6 digits are also
part of the Wi-Fi name.
•Open a browser and enter the IP address 192.168.55.66. The web
login page should appear. After login with admin/admin, the
settings page appears.
The internal Wi-Fi works as an Access Point (AP) for web access and, at
the same time, can act as a station to connect to an external AP for the
tunnel function. DHCP is always enabled for Wi-Fi.
See App Special Flags for more Wi-Fi options.
Wi-Fi Access Point
This enables or disables the internal AP mode and therefore enables
or disables the web access using Wi-Fi. The password to connect with
Wi-Fi can be changed in the FTP & Web & Wi-Fi Password field.
Wi-Fi Tunnel AP Name
Wi-Fi Tunnel AP Password
To setup a tunnel connection over Wi-Fi, the V-Tap must connect to
an external AP. In most of the cases this will be a router somewhere
in the building. The AP’s name and password must be filled in here.
The Wi-Fi module can be disabled completely by turning the Wi-Fi Access
Point option off in the settings AND the Tunnel AP fields must be left
empty. All further access must then be done through a LAN cable.
Sending tunnel data with Wi-Fi is slower than using a LAN cable. So,
some delay must be considered.

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3.3.4 FTP & Web settings
The V-Tap has a build in FTP (File Transfer Protocol) server that allows
you to access the internal filing system. At this moment, this is only used
for updating the firmware remotely (see chapter Update Firmware). FTP
can be disabled by setting the FTP Port to 0 (zero).
FTP & Web User name
User name to log in with FTP and the Web service.
The single and double quotation marks (‘ and “) cannot be used !
The default user name is “admin”.
FTP & Web & Wi-Fi Password
Password to log in with FTP and the Web service.
Also used as the password to connect to the V-Tap with Wi-Fi, only
when this field contains 8 characters or more. Less than 8 characters
will use the MAC address for the Wi-Fi password.
The single and double quotation marks (‘ and “) cannot be used !
The default password is “admin”.
FTP Port Number
By default, the FTP Port is on 21 for normal FTP access.
The PC tool ‘vcUpdater’ uses FTP to update the firmware of the V-
Tap. This tool can be found on the Vidicode website in the menu
Service and Support => Firmware.
By setting the FTP Port to 0 (zero), FTP is disabled completely.

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3.3.5 Telnet setting
TelNet Connection
The V-Tap unit can be accessed with the Telnet network protocol.
Telnet is an older protocol to access devices remotely with a simple
terminal and then perform maintenance or change settings. Telnet
also uses the TCP protocol with the fixed port number 23.
Running a Telnet client program on the PC makes it possible to
connect to the V-Tap. After connecting, the Device Name is shown,
and some debug information is constantly sent to Telnet; Opening
and closing of the Tunnel connection and, when an SD card is used,
the opening and closing of files.
Further there are two commands
The command ATMENU will first ask you to enter the web access
password and then brings you in a remote maintenance menu. Once
inside the menu, the tunnel function and SD card storage are
stopped.
The menu gives the user the possibility to change the settings, reset
the SD file counters, reset to factory settings and change the clock.
Normally, there is no need to use any of these functions over Telnet.
The command ATDEBUG is a toggle to enable and disable the output
of more debug information. This is further not described in this
manual.

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3.3.6 NTP settings
NTP (Network Time Protocol) can be used to synchronize the internal
clock. The V-Tap also has an internal battery to keep the clock running
when power fails, but this is not as accurate as the clock on an NTP
server. NTP gets the exact date and time from the server and the
internal clock is then updated with this.
The clock is added to each recording and is therefore very important to
get the date and time right for all recorded calls.
The V-Tap synchronizes the clock 6 times per day (each 4 hours).
NTP Server Address
The IP address or the host name of the NTP server. Default, the
address is set to “pool.ntp.org”, but the Gateway and the DNS server
must be defined also for this to work.
Leave this field empty when no NTP is used.
NTP Port Number
The used port number for NTP in the TCP protocol. This is always 123.
GMT Minutes Correction
The time correction in minutes to the GMT (Greenwich Mean Time)
zone. The number can start with the minus sign when needed.
For example, enter “-300” for Eastern Time (that is -5 hours for east-
coast US & Canada).

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3.3.7 Date and Time settings
The current date and time are shown on top of the page. A new date
and/or time can be set with the below parameters.
New Date (DD-MM-YYYY)
New Time (HH:MM:SS)
For the date, the entered format must be day, month and year,
separated by the minus-sign and always 10 characters long in total.
For the time, the entered format must be hour, minutes and seconds,
separated by the colon-sign and always 8 characters long in total.
The new date and time are set after pressing Save & Logout.