2N BRI Lite User manual

2N® BRI Lite/Enterprise
BRI-VoIP-GSM/UMTS Gateway
User Manual
Version 1.1
Firmware 1.5.0 www.2n.cz

The 2N TELEKOMUNIKACE a.s. joint-stock company is a Czech manufacturer and supplier
of telecommunications equipment.
The product family developed by 2N TELEKOMUNIKACE a.s. includes GSM gateways,
private branch exchanges (PBX), and door and lift communicators.
2N TELEKOMUNIKACE a.s. has been ranked among the Czech top companies for years
and represented a symbol of stability and prosperity on the telecommunications market
for almost two decades. At present, we export our products into over 120 countries
worldwide and have exclusive distributors on all continents.
2Nis a registered trademark of 2N TELEKOMUNIKACE a.s.. Any product and/or other
names mentioned herein are registered trademarks and/or trademarks or brands
protected by law.
2N TELEKOMUNIKACE administers the FAQ database to help you quickly find information
and to answer your questions about 2N products and services. On faq.2n.cz you can find
information regarding products adjustment and instructions for optimum use and

Declaration of Conformity
2N TELEKOMUNIKACE a.s. hereby declares that the 2NBRI Enterprise / Lite product
complies with all basic requirements and other relevant provisions of the 1999/5/EC
directive. For the full wording of the Declaration of Conformity see at www.2n.cz.
The 2N TELEKOMUNIKACE company is a holder of the ISO 9001:2008 certificate. All
development, production and distribution processes of the company are managed by this
standard and guarantee a high quality and advanced technical level of and a professional
approach to all of our products.

Table of Contents
1. Product Overview...............................................................7
1.1 Product Description....................................................................................................... 8
2N® BRI Enterprise / 2N® BRI Lite Differences............................................................... 8
Telephone Cost Cuts........................................................................................................ 8
2N®BRI Enterprise / 2N® BRI Lite Basic Features.......................................................... 9
DialThru (2N® BRI Enterprise) ....................................................................................... 10
1.2Safety Precautions....................................................................................................... 12
1.3 Upgrade......................................................................................................................... 13
1.4 Terms and Symbols Used ........................................................................................... 14
Manual Symbols............................................................................................................. 14
Future Functions, Innovations........................................................................................ 14
2. Description and Installation............................................15
2.1 Before You Start........................................................................................................... 18
Product Completeness Check........................................................................................ 18
Connector Lay-Out –Lower Side................................................................................... 19
Connector Lay-Out –Upper Side................................................................................... 20
Status LED Indicators –2N® BRI Lite............................................................................ 20
Status LED Indicators –2N® BRI Enterprise ................................................................. 21
Potential GSM/UMTS Troubles...................................................................................... 22
2.2 Brief Installation Guide................................................................................................ 23
Installation Conditions .................................................................................................... 23
SIM Card Inserting/Removing ........................................................................................ 24
Antenna Connection....................................................................................................... 25
Power Supply Connection.............................................................................................. 27
Ethernet Cable Connection............................................................................................ 28
NT and TE Connectors................................................................................................... 30
2.3 Available ISDN BRI Extension Configurations.......................................................... 32
Point-to-Point Configuration ........................................................................................... 32
Point-to-Multipoint Configuration.................................................................................... 33
2.4 Types of 2N® BRI Enterprise Connection................................................................... 34
ISDN TE –2N®BRI Enterprise Connection................................................................... 37
2N®BRI Enterprise Point-to-Point Connection .............................................................. 38
2N®BRI Enterprise Connection as DialThru Router...................................................... 39
3. Making Calls via BRI Gateway........................................41
3.1 Supported 2N BRI Gateway Functions ...................................................................... 42
3.2 Call Routing Principles................................................................................................ 43
LCR Table ...................................................................................................................... 44

Outgoing GSM Call Routing from Internal ISDN............................................................ 44
Incoming GSM Call Routing........................................................................................... 45
DISA Message................................................................................................................ 46
DISA Recording via PC and Web Interface ................................................................... 46
4. First Launch......................................................................47
4.1 Ethernet Interface......................................................................................................... 49
Ethernet Interface Factory Settings................................................................................ 49
MAC Address ................................................................................................................. 50
4.2 Licence .......................................................................................................................... 51
Restricted Use in GSM / UMTS Networks ..................................................................... 51
4.3 Firmware Version ......................................................................................................... 52
4.4 Factory Reset................................................................................................................ 53
4.5 Basic Configuration –Step by Step ........................................................................... 54
5. Introduction to Configuration Interface.........................56
5.1 Configuration Web Interface ....................................................................................... 57
Essential Data ................................................................................................................ 57
Login............................................................................................................................... 57
Web Icons....................................................................................................................... 58
Home Page..................................................................................................................... 58
Gateway ......................................................................................................................... 59
Utils................................................................................................................................. 79
Update............................................................................................................................ 79
Restart............................................................................................................................ 79
6. Configuration Via Terminal.............................................81
6.1 LAN Communication Setting....................................................................................... 83
6.2 GSM Gateway Behaviour............................................................................................. 83
6.3 List of Terminal AT Commands .................................................................................. 83
Basic AT Commands...................................................................................................... 83
Configuration AT Commands......................................................................................... 84
Tracing Commands........................................................................................................ 88
SMS Processing............................................................................................................. 89
6.4 Status Messages .......................................................................................................... 91
6.5 LOG Files....................................................................................................................... 94
6.6 Call Data Records (CDR) ............................................................................................. 95
6.7 Statistics - Description ................................................................................................ 96
7. Technical Parameters......................................................97
8. Supplementary Information ..........................................101

8.1 Directives, Laws and Regulations ............................................................................ 102
8.2 Troubleshooting......................................................................................................... 103
8.3 List of Abbreviations.................................................................................................. 105
8.4 General Instructions and Cautions .......................................................................... 107
Electric Waste and Used Battery Pack Handling......................................................... 108

7
1
1. Product
Overview
In this section, we introduce the 2N®BRI Lite / Enterprise product, outline its
application options and highlight the advantages following from its use.
Here is what you can find in this section:
Product Description
Safety Precautions
Upgrade
Terms and Symbols Used

Product Description
1.1
8
1.1 Product Description
The 2NEnterprise / BRI Lite GSM gateway provides direct interconnection of the
ISDN with GSM networks. It can also be used for direct interconnection of an ISDN
PBX with a GSM network, ISDN telephone set and, via a terminal adapter, with an
analogue apparatus or coin machine. The voice mode, i.e. outgoing and incoming
calls, is the basic function of the gateway. Moreover, the BRI gateway provides
connection to the VoIP-SIP networks. The gateway is equipped with all functions
necessary for this mode and is very user-friendly. In addition, 2NBRI Enterprise /
BRI Lite allows you to send and receive SMS messages. No additional devices (an
external telephone, e.g.) are required for normal operation. All gateway parameters
can be set using a configuration program (on an enclosed CD), or using the AT
commands. Programmable parameters are pre-set to make it possible to make calls
as soon as the supply cable, antenna a SIM cards are connected.
2N® BRI Enterprise / 2N® BRI Lite Differences
The 2NBRI Enterprise and 2NBRI Lite gateways are based on one and the same
type of hardware and apply identical firmware and control (configuration) software.
The only difference lies in the count of BRI ISDN interfaces:
Interface
2N® BRI Lite
2N®BRI Enterprise
BRI ISDN
1 (NT/TE)
2 (1 TE ; 1 NT)
Ethernet
YES*
YES*
* The VoIP-SIP support depends on Part No. (subject to licence).
Telephone Cost Cuts

make calls to the mobile network directly. This saves your PSTN - GSM
connection costs.
You do not pay for barred calls. You can set groups of barred numbers in
the gateway.
A flexible setting of the Least Cost Router helps you call GSM numbers at
minimum operational costs.
You can route calls to alte     VoIP/SIP
interface.
As all gateway user calls are added up for billing purposes, you are
advised to use the most advantageous tariff offered by your provider.

Product Description
1.1
9
2N®BRI Enterprise / 2N® BRI Lite Basic Features
Integration of the best features of two communication technologies: ISDN and
GSM
VoIP-SIP telephony support with G.711a/u and G.729ab codecs1
Intelligent routing of incoming and outgoing calls
Web interface for gateway configuration and SMS sending/receiving
Automatic no answer SMS sending for GSM networks
Automatic missed call SMS in the GSM network
Simple recording of a welcome note, DISA voice message
Automatic recording of call data and detailed statistics (CDR)
ENBLOCK/OVERLAP ISDN dialling switch option
Monitoring of ISDN BRI line statuses and alarm SMS sending option
Automatic sending of Alive SMS in user-defined intervals
Easy firmware upgrade via a configuration program
External synchronising source connection option (BRI Enterprise)
Mobility Extension2support.
1Depending on the licence
2Will be available in early 2013

Product Description
1.1
10
DialThru (2N® BRI Enterprise)
The difference between 2N®BRI Enterprise and 2N®BRI Lite lies in the DialThru
functionality. DialThru enables the gateway to be connected between the PBX and the
voice service provider line, i.e. PSTN. The GSM gateway in the DialThru mode routes,
based on the LCR, calls into the PSTN or GSM/UMTS networks.
Refer to the figure below for a schematic diagram of the 2N®BRI Enterprise
connection.
The gateway works as a dial-through router (using both the TE and NT ports in the
DialThru
mode) for calls to a mobile network, and a monitoring system, which, with the
appropriate licence, sends SMS to the provider (in the case of line unavailability, e.g.).

Product Description
1.1
11
The 2N®BRI Lite GSM gateway contains just one ISDN BRI port and thus cannot
work in the DialThru mode. It can be connected to a PBX on a trunk line or extension
and route calls to the GSM/UMTS networks only see the figure below.

Safety Precautions
1.2
12
1.2 Safety Precautions
It is prohibited to use any transmitters, including the GSM/UMTS gateways, in areas
where explosives are used, such as quarries.
It is prohibited to use the 2NBRI Enterprise / BRI Lite GSM gateways at petrol
stations where mobile telephones are also prohibited.
GSM phones may affect sensitive life-saving devices in medical centres. Therefore, it is
forbidden to use GSM/UMTS devices, including the GSM gateways, in such facilities.
In general, any prohibition regarding mobile phones based on RF energy radiation
applies to GSM/UMTS devices too.
If necessary, the GSM gateways may be installed at a safe distance from the
prohibited area and connected with the original place through an Ethernet cable.
Although GSM gateways are not intended for cars or aeroplanes, all relevant
prohibitions and regulations regarding mobile phones apply to them too.

Upgrade
1.3
13
1.3 Upgrade
The manufacturer reserves the right to modify the product in order to improve its
qualities.

the software contained in the product (firmware). For the latest 2NBRI Enterprise /
2NBRI Lite firmware version and the User Manual refer to the 2N web sites.
Refer to the S. 2, Description and Installation, for a detailed description of the 2N
BRI Enterprise / 2NBRI Lite firmware upgrade.
Manual
Version
Changes
1.0
The User Manual relates to the 2NBRI Enterprise / BRI Lite
firmware version 1.5.0.

Terms and Symbols Used
1.4
14
1.4 Terms and Symbols Used
Manual Symbols
Safety
Always abide by this information to prevent persons from injury.
Warning
Always abide by this information to prevent damage to the device.
Caution
Important information for system functionality.
Tip
Useful information for quick and efficient functionality.
Note
Routines or advice for efficient use of the device.
Future Functions, Innovations
The grey-marked text in this document designates the functions that are under
preparation or development at present.
.

15
2
2. Description and
Installation
This section describes the 2N®BRI Enterprise / 2N® BRI Lite product and its
installation.
Here is what you can find in this section:
Before You Start
Brief Installation Guide
Available ISDN BRI Extension Configurations
IP Voice Transmission
IP Voice Transmission
Speech Encoding Methods
Voice transmission is strictly separated from signalling in VoIP networks. Modern VoIP
networks mostly use the RTP (Realtime Transport Protocol) for voice transmission. The
purpose of the RTP is only to transmit data (voice) from a source to a destination at
real time.
Codecs are used to save the channel data capacity. Codecs process the voice signal
using variable algorithms to minimise the volume of user data. The degree of
compression used by the codec affects the quality of voice transmission. Thus, the
better voice transmission is required, the wider data range (the higher transmission
rate) is needed. The MOS (Mean Opinion Score) scale is used for rating voice
transmission quality, where 1 means the worst and 5 the best quality. For a survey of
the codecs supported by 2N BRI gateway refer to the table below.
Codecs supported
Standard
Algorithm
Transmission rate [kbps]
MOS
G.711a
PCM
64
4.1
G.711u
PCM
64
4.1
G.729
CS-ACELP
8
3.92

16
For 2N BRI gateway, quadruple the above mentioned rates (two fully duplex calls) and
add the TCP and IP header transmission rate to the result to get the resultant
transmission rate.
It is important to keep both a stable appropriate transmission rate during connection
and a small and identical transmission time per data packet in order to maintain a
high-quality voice transmission.
G.711 this codec is used in digital telephone networks. The PCM (Pulse Code
Modulation) is used for voice signal encoding. The sampled signal is encoded
in 12 bits and then compressed using a non-linear scheme into the resultant 8
bits. Europe uses the A-law compression system while North America and
Japan obey the -law. The resultant data flow is 64 kbps.
G.729 this codec uses the CS-ACELP (Conjugate-Structure Algebraic-Code-
Excited Linear-Prediction) algorithm with the resultant transmission rate of 8
kbps. The speech signal is split into blocks of 10 ms each. The parameters of
these blocks are then inserted in frames of the size of 10 bytes. 2-byte
frames are generated for noise transmission.
During call set-up, a codec is selected automatically for voice transmission. 2N BRI
gateway supports the codecs included in the table above. The type of codec to be used
depends on your VoIP network (individual devices) and your 2N BRI gateway
configuration. 2N BRI gateway is designed primarily for VoIP corporate networks and

incompatible with 2NVoiceBlue Next, the call will be rejected.
The SIP and ITU-T H.323 recommended protocols are mostly used for connection
establishing, maintaining and cancelling. 2N BRI gateway uses the SIP (Session
Initiation Protocol) signalling.
Tip
In the case of separated direct connection of your SIP Proxy and 2N
VoiceBlue Next, use the G.711 codec to achieve a high voice quality.
SIP Components
The following components are involved in the SIP message exchange:
UAC (User Agent Client) the terminal device client, which initiates SIP
signalling.
UAS (User Agent Server) the terminal device server, which responds to SIP
signalling from the UAC.
UA (User Agent) a SIP network terminal (SIP phones, gateways to other
networks, etc.), which contains the UAC and UAS.
Proxy server receives connection requests from the UA and transfers them
to the next Proxy server if the given station is not under it administration.
Redirect server receives connection requests, but, instead of sending them
to the called line, sends them back to the requesting device asking for where
to route the request.

17
Location server receives registration requests from the UA and updates the
terminal database accordingly.
All the server components (Proxy, Redirect, Location) are mostly on one physical
device called Proxy server, which is responsible for keeping a client database and
connection establishing, maintaining and terminating, as well as call routing.
The 2N BRI gateway VoIP-GSM gateway acts as a UA in any case (has the same
functions as a VoIP phone), i.e. receives call set-up requirements and, on the basis of
its inner LCR table, routes calls to GSM networks.
None of the SIP-defined server components are integrated in the 2N BRI gateway
gateway.
SIP Signalling Messages
Below is a list of messages sent via the SIP:
INVITE connection set-up request;
ACK INVITE confirmation by the final message addressee;
BYE connection termination;
CANCEL failed connection cancellation;
REGISTER UA registration with the SIP Proxy;
OPTIONS server capability query.
The answers to the SIP messages are numerically coded as the case is with the http
protocol. Below are the most important ones:
1XX information messages (100 trying, 180 ringing, 183 -
progress);
2XX successful request completion (200 OK);
3XX request forwarding needed (302 temporarily moved, 305 use
Proxy);
4XX error (403 forbidden, 486 busy here);
5XX server error (500 Server Internal Error, 501 not implemented);
6XX global failure (606 not acceptable).
Types of 2NBRI Enterprise Connection

Before You Start
2.1
18
2.1 Before You Start
Caution
Make sure that you are equipped with all system components necessary
for putting 
and/or duly configured ISDN BRI line of your PBX or PSTN, an available
Ethernet/USB socket and a PC for initial gateway configuration).
Product Completeness Check
Before installing this product, check whether the 2N BRI gateway delivery complies
with the following packing list:
Package
BRI Lite
BRI Enterprise
2NBRI Enterprise / Lite
1
1
Power supply adapter
1
1
Long antenna
1 2*
1 2*
Ethernet cable
1
1
BRI ISDN cable
1
2
Wall mounting set
1
1
*depends on the Part No.

Before You Start
2.1
19
Connector Lay-Out –Lower Side
The following connectors are available on the BRI gateway bottom:
Connector type
BRI Lite
BRI Enterprise
DC Jack 2.1mm supply connector
YES
YES
10/100BaseT Ethernet connector
YES
YES
ISDN BRI TE interface
NO
YES
ISDN BRI NT interface
NO
YES
ISDN BRI NT/TE interface
YES
NO
Caution
2N®BRI Lite has two RJ45 connectors, which, however, are cross-
connected into one ISDN BRI. Be sure to connect just one ISDN BRI line to
make the system work properly. Which of the RJ45 connectors will be used
depends on the type of the equipment to be connected (NT/TE) and the
interconnecting cable (cross/straight).
Supply connector
SIM 1 and SIM 2
10/100BaseT
ISDN BRI NT/TE (Lite)
ISDN BRI NT a TE (Enterprise)
RESET button

Before You Start
2.1
20
Connector Lay-Out –Upper Side
There are SMA female antenna connectors to each GSM/UMTS module on the 2NBRI
Enterprise / Lite upper side.
Status LED Indicators –2N® BRI Lite
The 2NBRI Lite status is indicated by five LEDs on the front side. BRI 1 and BRI 2
indicate the status of ISDN BRI B-channels and CH 1 and CH 2 indicate the status of
each GSM/UMTS module. Refer to the table below for the statuses
* If the devices have been interconnected, the layers will not be connected until the first call.
LED Indicators
Power supply
green lightmains powered
no light device switched off
GSM/UMTS
network
green light call in progress
red light –error
green flashing –network registration, SMS
red flashing –module restart
Red/green flashing signal intensity indication
ISDN port
green light 2 calls in progress
green flashing ISDN synchronisation/active call
red light ISDN disconnected
red flashing synchronisation of lower ISDN layers
Ethernet port
green light + no orange light disconnected
green light + orange flashing –100BaseT
connected, in operation
no green light + orange light 10baseT connected, no
operation
green flashing + orange flashing 10BaseT connection,
in operation
Signal intensity
Signal intensity indication:
one segment = less than -109dbm
two segments = more than -95dbm
three segments = more than -81dbm
four segments = more than -65dbm