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.
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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
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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.
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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.

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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.

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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

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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.

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Figure 7: The IP default routes entry page
Field name
Description
Command line
Configured
Enables or disables the default route.
Set Configured to Yes
Set Ip Route Default
Configured
Route Type
Indicates whether the route type is
over a numbered or unnumbered
link. A numbered link is a link that
has been assigned an IP address.
Set Route Type to unnumbered.
Ip Route Default Indexed
Numbered
Numbered Route
Next Hop IP
If you have set Route Type to
numbered, enter the IP address, in
dotted-decimal notation, of an
adjacent router to which to send
traffic when a route to a destination
is not known by the local device.
Ip Route Default Indexed
Next Hop Ip
Unnumbered Route
Next Hop Interface
If you have set Route Type to
unnumbered, select the interface
that provides a connection to the
next hop router. Set the Next Hop
Interface to one of the options from
the drop down list.
Ip Route Default Indexed
Next Hop Interface
Metric
Defines the RIP metric for the route.
Minimum
Value
1
Default
1
Ip Route Default Indexed
Metric

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Value
Maximum
Value
15
Units
Unspecified
Last Resort
Specifies that the route is to be used
only if all others are down. Usually
used with a route that is slow or
expensive, or both.
Ip Route Default Indexed
Last Resort
Table 2: The IP default route entry page fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears.
4.2.3 Configure the PPP interface
The GSM (3G) modem uses the modem-0 interface, so you must configure ppp-2 to send
and receive data using the modem-0 interface.
In the Expert View menu, select interfaces -> ppp-2 -> wan interface. The PPP WAN
Interface page appears.
Figure 8: The WAN interface page
On the PPP WAN Interface on ppp-2 page, select Modem -0 from the Wan Interface
drop-down list.
Field name
Description
Command line
WAN Interface
Defines the connection type on the
PPP WAN interface.
Ppp Interface Wan
Interface
Table 3: The PPP WAN interface field, its description and command line
Click Update. The Configuration Update Result page appears.

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4.2.4 Configure the IP interface
To configure the IP interface, in the Expert View menu, select interfaces -> ppp-2 ->
ip -> ip. The IP Interface page appears.
Figure 9: The IP interface on ppp-2 page
Field name
Description
Command line
Enabled
Enables or disables IP operation on
the selected interface.
Set to yes.
Set Ip Interface Enabled
Type
Select one of the following options to
define the point to point link
associated with the PPP interface as
operating in unnumbered IP mode or
numbered IP mode.
numbered
Configures an IP
point to point link
for numbered
operation. Default.
unnumbered
Configures an IP
point to point link
for numberless or
unnumbered
operation.
Note: when an interface is defined as
unnumbered, the IP Address field for
the interfaces(s) must be set to
0.0.0.0.
Set to unnumbered.
Set Ip Interface
Unnumbered Link Enabled
IP Address
Enter the IP address, in dotted
decimal notation, to be assigned to
the selected interface.
This field and the Mask provide the
Set Ip Interface Address

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network and host identification.
This configuration change does not
take effect until the device reboots.
Note: When the interface is defined as
unnumbered, this field must be set to
0.0.0.0
Set IP Address to 0.0.0.0.
Mask
Enter the subnet mask, in dotted
decimal notation, to be assigned to
the selected interface. The subnet
mask is used to determine the
network and host ID from the IP
address and is based on the network
class.
Set Mask to 255. 255. 255. 0.
Set Ip Interface Address
Mask
Remote IP
Address
Enter the IP address of the peer at the
opposite end of the point to point link
associated with the selected interface.
The IP router process establishes a
host route to the end point of each
point to point link based on the
remote address.
Remote IP Address to 0.0.0.0.
Set Ip Interface Remote
Address
Remote Mask
Specify the subnetwork mask, in
dotted decimal notation, to be
associated with the remote end point
of an unnumbered IP link.
Remote Mask to 255.255.255.0
Set Ip Interface Remote
Mask
MTU
Enter the size, in bytes, of the largest
IP datagram that can be sent by the
selected interface. The MTU value
includes the data link header, IP
header, and IP data field.
Minimum
Value
64
Default
Value
1500
Maximum
Value
1500
Units
Bytes
Set MTU to 1500
Set Ip Interface Mtu
BOOTP enabled
This option is used to enable or
disable BOOTP on the selected
interface.
yes
Enables BOOTP
no
Disables BOOTP
Set BOOT enabled to no.
Set Ip Interface Bootp
Enabled
Table 4: The IP interface on ppp-2 fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears.

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4.2.5 Configure address translation
In the Expert View menu, select interfaces -> ppp-2 -> ip -> address translation ->
outgoing. The Outgoing Address Translation page appears.
Figure 10: The outgoing address translation page
Field name
Description
Command line
Enabled
Enables or disables the translation of
outgoing IP datagrams on this
interface.
Yes
Enables translation of
outgoing IP datagrams on
the selected interface.
no
Disables translation of
outgoing IP datagrams on
the selected interface.
Ip Address Translation
Interface Enabled
Table 5: The outgoing address translation on ppp-2 field, its description and command line
On the Outgoing Address Translation page, set Enabled to no when using a routing
protocol such as RIP or BGP.
Click Update. The Configuration Update Result page appears.
4.2.6 Configure IPCP options
In the Expert View menu, select interfaces ->ppp-1 ->ip->ipcp options->local
address. The Local IP Address Negotiation page appears.

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Figure 11: The local IP address page
Field name
Description
Command line
Enabled
Enables or disables the IP address
negotiation on the local end of the
link.
Set Enabled to yes.
Set Ppp Interface Local
Option Ipcp Address
Enabled
Required
Specifies whether or not negotiation of
the local IP address is required.
Set Required to no.
Set Ppp Interface Local
Option Ipcp Address
Negotiation Required
Enabled
Negotiable
Indicates whether the IP address is
negotiable or not negotiable.
Negotiable to yes.
Ppp Interface Local
Option Ipcp Address
Negotiable Enabled
IP Address
If negotiation is enabled, enter the IP
address to use for local IP address
negotiation. Enter the IP address in
dotted decimal notation.
Set IP Address to 0.0.0.0
Ppp Interface Local
Option Ipcp Address Value
Table 6: The local IP address fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears.
In the Expert View menu, select interfaces ->ppp-1 -> ip -> ipcp options-> local
primary dns. The Local Primary DNS page appears.

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Figure 12: The local primary DNS negotiation on ppp-2 page
Field name
Description
Command line
Enabled
Enables or disables negotiation of the
primary DNS IP address on the local
end of the link.
Set Enabled to yes.
Set Ppp Interface Local
Option Ipcp Primary Dns
Address Enabled
Required
Enables or disables primary DNS
negotiation on the local end of the
link.
Set Required to no.
Set Ppp Interface Local
Option Ipcp Primary Dns
Address Negotiation
Required Enabled
Negotiable
Indicates whether primary DNS
negotiation is negotiable or not
negotiable by the local end of the link.
Negotiable to yes.
Set Ppp Interface Local
Option Ipcp Primary Dns
Address Negotiable
Enabled
IP Address
Enter the IP address of the primary
DNS server to be used by the local
end of the link. Setting the IP address
to 0.0.0.0 is an explicit request that
the remote end provides the address
information.
Address to 0.0.0.0.
Set Ppp Interface Local
Option Ipcp Primary Dns
Address Value
Table 7: The local primary DNS fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears.
In the Expert View menu, select interfaces ->ppp-2 ->ip->ipcp options->local
secondary dns. The Local Secondary DNS Negotiation page appears.

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Figure 13: The local secondary DNS negotiation on ppp-2 page
Field name
Description
Command line
Enabled
Enables or disables negotiation of the
primary DNS IP address on the local
end of the link.
Set Enabled to yes.
Set Ppp Interface Local
Option Ipcp Secondary Dns
Address Enabled
Required
Enables or disables primary DNS
negotiation on the local end of the
link.
Set Required to no.
Set Ppp Interface Local
Option Ipcp Secondary Dns
Address Negotiation
Required Enabled
Negotiable
Indicates whether primary DNS
negotiation is negotiable or not
negotiable by the local end of the link.
Negotiable to yes.
Set Ppp Interface Local
Option Ipcp Secondary Dns
Address Negotiable
Enabled
IP Address
Enter the IP address of the primary
DNS server to be used by the local
end of the link. Setting the IP address
to 0.0.0.0 is an explicit request that
the remote end provides the address
information.
Set Address to 0.0.0.0
Set Ppp Interface Local
Option Ipcp Secondary Dns
Address Value
Figure 14: The secondary DNS fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears.

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4.2.7 Select asynchronous PPP operation
All PPP interfaces by default are configured for synchronous data transfer. The GSM (3G)
modem however uses asynchronous data transfer so you must configure the PPP
interface to operate asynchronously.
In the Expert View menu, select interfaces -> ppp-1 -> ppp -> ppp. The PPP Interface
page appears. Click Advanced to view advanced options.
Figure 15: The PPP interface page
Set Enabled to yes, and set Asychronous Link Enabled to yes. You can leave all other
settings at their default values.
Field name
Configuration
Command line
Enabled
Enables the ppp-2 interface.
Set Ppp Interface
Enabled
Maximum Receive
Unit (MRU)
The SMG sends the MRU to the end
device or peer to inform it that the
router can receive larger packets, or to
request that the peer send smaller
packets. Enter the MRU for the
specified PPP interface. Minimum value
is 512 bytes. Default/Maximum value is
1524 bytes.
Set Ppp Interface
Maximum Receive Unit
Maximum Remote
Receive Unit
The peer sends the Maximum Remote
Receive Unit (MRRU) to the SMG to
inform it that the remote router can
receive larger packets, or to request
Set Ppp Interface
Maximum Remote Receive
Unit

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that the peer send smaller packets.
Enter the MRRU for the specified PPP
interface. Minimum value is 512 bytes.
Default/Maximum value is 1524 bytes.
Period
Authentication
Timer
Indicates the length of time, up to
3600 seconds, between successive
attempts to authenticate the PPP peer
associated with the selected PPP
interface.
Set Ppp Interface
Periodic Authentication
Timer
Maximum
Authentication
Retries
Indicates the maximum number of
authentication retries after the first
authentication attempt fails. When the
maximum number of retries is
exceeded, the connection is terminated
on the selected PPP interface. The
maximum number of retries allowed is
64; the default is 3. Minimum value is
0 and maximum value is 64.
Set Ppp Interface
Maximum Number Of
Authentication Retries
IP Enabled
Enables IP on the interface.
Set Ppp Interface Ip
Enabled
Bridging Enabled
Enables or disables bridging
negotiation and operation on the
selected PPP interface.
Set Ppp Interface Stp
Enabled
Time to Send LQR
Indicates the length of time in seconds
to send the LQR. The maximum
allowed is 3600 seconds; the default is
0 seconds.
Set Ppp Interface Time
To Send Lqr
Send Time
Remaining Enabled
Enables or disables the option to send
a notice indicating the amount of time
remaining for the connection on the
selected interface.
Set Ppp Interface Send
Time Remaining Enabled
Send Identifier
String Enabled
Enables or disables the option to send
an identifier string on the selected
interface. When this option is enabled,
enter the identifier string in the
Identifier String field.
Set Ppp Interface Send
Identifier String
Enabled
Identifier String
Used to enter the identifier string when
Send Identifier String Enabled is set to
yes.
Set Ppp Interface
Identifier String
Asynchronous Link
Enabled
Enables the interface to communicate
in asynchronous mode.
Set Ppp Interface
Asynchronous Link
Enabled
Primary DNS IP
Address
Address of the primary DNS server.
Set Ppp Interface Dns Ip
Address
Secondary DNS IP
Address
Address of the secondary DNS server.
Set Ppp Interface
Secondary Dns Ip Address
Table 8: The PPP Interface fields, their descriptions and command lines
Click Update. The Configuration Update Result page appears.
4.2.8 Configure 3G Username and Password
Access to each PPP interface can be restricted, based on a username and password. The
username and password for the local interface are entered in the Local Username and