virtual access GW2040 Series User manual

Configuring a GSM (3G) modem on
a GW2040 Series Router
Issue
1.5
Date
10 May 2012

Table of contents
Copyright 2011 Virtual Access (Irl) Ltd. This material is protected by copyright. No part of this material may be reproduced,
distributed, or altered without the written consent of Virtual Access. All rights reserved. Third party trademarks are the property
of the third parties.
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 2 of 34
1About this document ............................................................................... 3
1.1 Scope ..................................................................................................... 3
1.2 Readership ............................................................................................. 3
1.3 More information.................................................................................... 3
1.3.1 Assigned interface number ...................................................................... 3
1.3.2 References to GSM (3G) .......................................................................... 3
1.4 Terminology ........................................................................................... 3
1.5 Prerequisites .......................................................................................... 3
1.5.1 Inserting the SIM card ............................................................................ 3
1.5.2 Internet Service Provider details............................................................... 4
2Introduction ............................................................................................ 5
2.1 3G overview ........................................................................................... 5
2.2 Typical uses of the GSM (3G) modem ..................................................... 5
2.3 Types of data bearers that the GSM (3G) modem supports .................... 6
2.3.1 GPRS .................................................................................................... 6
2.3.2 HSDPA .................................................................................................. 6
2.3.3 HSUPA .................................................................................................. 6
2.3.4 UMTS.................................................................................................... 6
2.3.5 Edge ..................................................................................................... 6
3Configuring the GW2040 series ............................................................... 7
4Setting up the GSM (3G) modem for a primary WAN link ........................ 8
4.1 PPP layer structure ................................................................................ 8
4.2 Configuring the GW2040 series to use the GSM (3G) modem interface .. 8
4.2.1 Configure the GSM (3G) modem and APN .................................................. 9
4.2.2 Configure the IP default route .................................................................10
4.2.3 Configure the PPP interface.....................................................................12
4.2.4 Configure the IP interface .......................................................................13
4.2.5 Configure address translation..................................................................15
4.2.6 Configure IPCP options...........................................................................15
4.2.7 Select asynchronous PPP operation ..........................................................19
4.2.8 Configure 3G Username and Password .....................................................20
4.2.9 Set dialling options for GSM only .............................................................24
4.2.10 Configure the modem interface ...............................................................25
4.2.11 Save the configuration ...........................................................................26
4.2.12 Reload the configuration.........................................................................27
5Performing GSM (3G) monitoring and diagnostics................................. 28
5.1 View the connection monitor................................................................ 28
5.1.1 Call history ...........................................................................................28
5.1.2 Active data connections..........................................................................30
5.1.3 Trace analyzer ......................................................................................30
5.1.4 Modem statistics and signal quality ..........................................................33

1: About this document
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 3 of 34
1About this document
1.1 Scope
This configuration guide explains how to set up and configure a primary link using the
GSM (3G) modem on a GW2040 Series router.
1.2 Readership
This document is for engineers who have previous experience configuring and managing
GW Series routers.
1.3 More information
1.3.1 Assigned interface number
Throughout this guide we have used ppp-2 as the assigned interface number. You can
configure any PPP interface number for connections. For example, ppp-1 could be
substituted for each ppp-2 task covered in this document.
1.3.2 References to GSM (3G)
The GW2040 web interface refers to GSM, not 3G, so screen grabs of the web interface
will vary.
1.4 Terminology
Abbreviation
Description
APN
Access Point Name
GSM
Global System for Mobile communications
HSDPA
High-Speed Downlink Packet Access
UMTS
Universal Mobile Telecommunications System
EDGE
Enhanced Data rates for GSM Evolution
1.5 Prerequisites
1.5.1 Inserting the SIM card
Ensure the unit is powered off.
Hold the SIM card with the chip side facing down and the cut corner top left.
Gently push the SIM card into SIM slot 1 until it clicks in.
To remove the SIM card, gently push the SIM card. The card will click out.
WARNING
The SIM card MUST be inserted into the SMG before the unit is powered on.

1: About this document
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 4 of 34
Do not insert or remove the SIM card after the unit has been powered on.
1.5.2 Internet Service Provider details
Before you configure the GSM (3G) modem, check with your Internet Service Provider for
the following information:
Number
Username and password
PIN
PUK, and
Access Point Name

2: Introduction
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 5 of 34
2Introduction
2.1 3G overview
3G is the third generation of mobile phone standards and technology. It is based on the
International Telecommunication Union (ITU) family of standards under the International
Mobile Telecommunications programme, IMT-2000.
3G technologies enable network operators to offer users a wider range of more advanced
services while achieving greater network capacity through improved spectral efficiency.
Services include wide-area wireless voice telephony, video calls, and broadband wireless
data, all in a mobile environment.
The GW2040 Series router contains a GSM (Global System for Mobile communications)
3G wireless modem. The modem in connection with a SIM card establishes a WAN
connection to the Internet.
The GW2040 Series router supports a maximum download speed of 7.2 Mbps and a
maximum upload speed of 384 kbps.
2.2 Typical uses of the GSM (3G) modem
You can use the GSM (3G) modem on the GW2040 Series in two ways.
You can create a primary WAN link over the GSM (3G) modem.
Figure 1: A primary WAN link over the 3G modem
You can use the GSM (3G) modem as a backup WAN link. If the primary interface
link fails, the GW2040 Series router uses its GSM (3G) modem to automatically
route traffic across the Internet via its alternative interface. This set up is not
covered in this document. For further information contact Virtual Access.

2: Introduction
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 6 of 34
Figure 2: A primary link using the 3G modem on the GW2040 series router
2.3 Types of data bearers that the GSM (3G) modem supports
Data bearers are frame protocols that transport data streams. The GSM (3G) modem
supports GPRS, HSDPA, and CSD.
2.3.1 GPRS
GPRS (General Packet Radio Service) uses packet-switched technology to transmit small
bursts of data. The maximum data rate available to the 3G modem depends on
provisioning by the network operator.
2.3.2 HSDPA
HSDPA (High-Speed Downlink Packet Access) uses circuit-switched technology to
transmit data at speeds of up to 7.2Mbps.
2.3.3 HSUPA
HSUPA (High-Speed Uplink Packet Access) is a 3G mobile telephony protocol with up link
speeds of 5.76Mbps.
2.3.4 UMTS
UMTS (Universal Mobile Telecommunications System) is a 3rd generation technology
providing higher transfer rates.
2.3.5 Edge
Edge uses the same frequencies as GPRS but offers better speeds. It is used when the
signal strength for 3G is not sufficient.

3: Configuring the
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 7 of 34
3Configuring the GW2040 series
The GW2040 Series contains an internal web server that is used to configure the router.
Before you can access the internal web server and start the configuration, you must
ensure that your PC has the correct networking set up.
When your GW2040 Series router is correctly connected to your PC, type fast.start into
the URL line of your browser to display the start page. Alternatively, you can type in the
IP address of the gateway.
Figure 3: The GW2040 series web interface start page
If a login page appears type in the login password you received from your administrator.
If you have not received a password, contact the Virtual Access Support team.
Access the Fast Start Wizard by clicking the Fast.Start icon on the start page of the
embedded web.
The Fast Start Wizard will guide you through a series of forms that you must complete to
configure your GW2040 Series router.

4: Setting up the GSM (3G) modem for a primary WAN link
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 8 of 34
4Setting up the GSM (3G) modem for a primary WAN link
4.1 PPP layer structure
Figure 4 shows the PPP layer structure required to configure a primary WAN link.
Figure 4: PPP layer structure
4.2 Configuring the GW2040 series to use the GSM (3G) modem
interface
To configure the GW2040 Series to use the GSM (3G) modem interface, follow the steps
in sections 4.2.1 to 4.2.10. You do not have to save each configuration until you have
updated all your settings. When you have completed all your configuration changes, you
must save the configuration as described in section 4.2.11.

4: Setting up the GSM (3G) modem for a primary WAN link
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 9 of 34
4.2.1 Configure the GSM (3G) modem and APN
Set up the GSM (3G) modem for a primary WAN link in the Expert View of the Advanced
section of the web of the GW2040 Series router.
On the Start page, click Advanced.
In the Advanced menu, click Expert View.
In the Expert View menu, select interfaces -> modem-0 -> gsm. The Modem
Interface GSM page appears. Click Advanced to view advanced options.
Figure 5: The GSM on modem page
Set Access Point Name, PIN, PIN2, PUK, and PUK2 according to your ISP settings.
Field name
Description
Command line
APN (Access
Point Name)
For GPRS operation only. An access
point name is given by a network
operator for connection into the GPRS
network. Enter your service provider’s
Access Point Name (APN).
Set Modem Interface Gsm
Apn
PIN
<SIM PIN number>. This may or may
not be required, depending on SIM card
type. Check with your service provider.
Set Modem Interface Gsm
Pin
PIN2
<SIM PIN2 number>. This may or
may not be required, depending on SIM
card type. Check with your service
provider.
Set Modem Interface Gsm
Pin2
PUK
<SIM personal unlock key>. This
may or may not be required, depending
on SIM card type. Check with your
service provider.
Set Modem Interface Gsm
Puk
PUK2
<SIM personal unlock key 2>. This
Set Modem Interface Gsm
Puk2

4: Setting up the GSM (3G) modem for a primary WAN link
Configuring a GSM (3G) modem on a GW2040 Series Router © Virtual Access Ltd.
Issue: 1.5 Page 10 of 34
may or may not be required, depending
on SIM card type. Check with your
service provider.
Radio Access
Technology Mode
2G=GSM, 3G=UTMS, Auto sets to 3G. If
there is no 3G access, radio access
automatically defaults to 2G.
Set Radio Access to auto.
Set Modem Interface Gsm
Rat
Table 1: GSM on modem-0 fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears. You do not have to save
your configurations until you have updated all your settings.
4.2.2 Configure the IP default route
In the Expert View menu, select system -> ip -> ip routing -> default routes list.
The IP Default Routes List page appears.
Figure 6: The IP default routes list page
In the Operation column, click add in the Index 1 row. The IP Default Routes Entry page
appears.