Swyx SwyxConnect 1722 User manual
SwyxConnect 1722
SwyxConnect 1723
SwyxConnect 1724
Documentation
SwyxWare Branch Office Solution
As of: September 2006
© 2000-2006 Swyx. All rights reserved.
Legal Information
Whilst Swyx attempt to convey accurate and current information relative to the creation of
SwyxWare and this documentation, the information provided in this user guide may contain
typographical or technical errors.
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warranty of any kind, whether expressed or implied, including, but not restricted to, any implied
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Swyx Solutions
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III
Preface
Thank you for your confidence in us!
Swyx VoIP Routers provide the comprehensive functions of an access
router, professional firewall and high-quality VPN gateway and
WLAN access point in a single, compact device. They thus combine
investment protection and cost savings as a reliable voice over IP
solution for small and mid-sized enterprises, home and branch
offices.
Standard features of the different models are integrated interfaces for
ADSL and ISDN, and a LAN switch. SwyxConnect 1723
additionally provides interfaces for analog telephone systems.
In addition to data communications functions, VoIP support
transforms SwyxConnects into fully fledged, integrated VoIP
communications solutions. Along with Quality of Service functions
which are optimized for VoIP, the Swyx VoIP Routers offer the full
range of options required for voice communications over data
networks and the step-by-step, cost-effective and simple migration
from existing telecommunications systems to corporate Voice over IP.
The particular characteristics of Swyx VoIP Routers include, among
others:
• SIP proxy for registration with providers and upstream VoIP
PBXs
• SIP trunking for multiple parallel lines with extension numbers
over a single account with a switchboard number.
• SIP gateway with transparent transition between SIP and
ISDN/analog telephony
• SIP remote gateway provides local SIP, ISDN or analog lines to
remote IP-PBXs.
• Intelligent call routing and number translation
• Support of point-to-point and point-to-multipoint connections
• Multiple configurable ISDN interfaces (NT/TE), some with life-
line support and power relay to the internal ISDN bus
Information about your model's functionality in detail is available
from the table 'Just what can your Swyx VoIP Router do?'.
SwyxConnect products undergo continuous development. For precise
information about their features and for the latest version of the
LCOS operating system, please visit the SwyxConnect website.
IV
Model variants
This documentation is to be used for different models:
• SwyxConnect 1722
• SwyxConnect 1723
• SwyxConnect 1724
Model restriction The sections of the documentation that refer only to a range of
models are marked either in the corresponding text itself or with
appropriate comments placed beside the text.
In the other parts of the documentation, all described models have
been classified under the general term Swyx VoIP Router.
Security settings
To maximize the security available from your product, we
recommend that you undertake all of the security settings (e.g.
firewall, encryption, access protection, charge limits) that were not
already activated when you purchased the product. The LANconfig
Wizard 'Security Settings' will help you with this task. Further
information is also available in the chapter 'Security settings'.
We would additionally like to ask you to refer to our Internet site
www.swyx.com for the latest information about your product and
technical developments, and also to download our latest software
versions.
User manual and reference manual
The documentation of your device consists of three parts: The
installation guide, the user manual and the reference manual.
You are now reading the user manual. It contains all information you
need to put your device into operation. It also contains all of the
important technical specifications.
The reference manual can be found on the LANCOM product CD as
an Acrobat (PDF) document. It is designed as a supplement to the
user manual and goes into detail on topics that apply to a variety of
models. These include, for example:
• The system design of the operating system LCOS
• Configuration
• Management
• Diagnosis
• Security
V
• Routing and WAN functions
• Firewall
• Quality of Service (QoS)
• Virtual Private Networks (VPN)
• Virtual Local Networks (VLAN)
• Voice communication in computer networks with Voice over IP
(VoIP)
• Backup solutions
• Further server services (DHCP, DNS, charge management)
This documentation was created by …
... several members of our staff from a variety of departments in order
to ensure you the best possible support when using your
SwyxConnect product.
In case you encounter any errors, or just want to issue critics
enhancements, please do not hesitate to send an email directly to:
Our online services www.swyx.com are available to you around the
clock should you have any queries regarding the topics discussed in
this manual or require any further support. The area 'Support' will
help you with many answers to frequently asked questions (FAQs).
Furthermore, the knowledgebase offers you a large reserve of
information. The latest drivers, firmware, utilities and documentation
are constantly available for download.
In addition, SwyxConnect support is available. For telephone
numbers and contact addresses of SwyxConnect support, please see
the enclosed leaflet or the Swyx website.
Information symbols
Very important instructions. Failure to observe this
may result in damage.
Additional information that may be helpful but
which is not required.
VI
Contents
Introduction 1-1
How do ADSL and ADSL 2+ work? ........................... 1-1
What does VPN offer? ............................................... 1-3
Firewall....................................................................... 1-4
Voice over IP .............................................................. 1-5
Example Applications .......................................................... 1-5
The central position of the Swyx VoIP Router ................... 1-10
VoIP characteristics of the Swyx VoIP Routers................. 1-13
Just what can your Swyx VoIP Router do? .............. 1-15
Installation 2-1
Package content ........................................................ 2-1
System requirements ................................................. 2-2
Introducing the SwyxConnect .................................... 2-2
Status displays .................................................................... 2-2
Device connectors ............................................................... 2-7
Hardware installation.................................................. 2-9
Configuring the ISDN and analog interfaces............ 2-11
ISDN interface in NT or TE mode...................................... 2-11
Bus termination, life-line support and power supply .......... 2-12
Protocol setting.................................................................. 2-14
ISDN connection timing ..................................................... 2-15
Software installation ................................................. 2-16
Starting Software Setup..................................................... 2-17
Which software should I install? ........................................ 2-17
Configuring the VoIP functions 3-1
LANconfig Wizards..................................................... 3-1
Configuration examples ............................................. 3-2
Using VoIP telephony as an extension to an analog PBX... 3-2
Using VoIP telephony to complement the ISDN PBX.......... 3-8
VoIP telephony with extension numbers (SIP trunking) .... 3-14
Configuring the VoIP terminal equipment ................ 3-19
Setting up the VoIP client to register itself with the
Swyx VoIP Router................................................. 3-19
Setting up the VoIP client to register at a PBX .................. 3-20
Setting up the VoIP telephone to register itself with the
Swyx VoIP Router................................................. 3-22
VII
Basic configuration 4-1
Which information is necessary? ............................... 4-1
TCP/IP settings ................................................................... 4-1
Configuration protection ...................................................... 4-3
Settings for the DSL connection.......................................... 4-3
Connect charge protection .................................................. 4-3
Instructions for LANconfig.......................................... 4-4
Instructions for WEBconfig......................................... 4-5
TCP/IP settings to workstation PCs ........................... 4-9
Setting up Internet access 5-1
Instructions for LANconfig.......................................... 5-2
Instructions for WEBconfig......................................... 5-2
Linking two networks 6-1
What information is necessary? ................................. 6-2
General information............................................................. 6-2
Settings for the TCP/IP router ............................................. 6-4
Settings for the IPX router................................................... 6-6
Settings for NetBIOS routing............................................... 6-7
Instructions for LANconfig.......................................... 6-7
Instructions for WEBconfig......................................... 6-8
Providing dial-in access 7-1
Which information is required? .................................. 7-1
General information............................................................. 7-2
Settings for TCP/IP ............................................................. 7-3
Settings for IPX ................................................................... 7-4
Settings for NetBIOS routing............................................... 7-4
Settings for the dial-in computer ................................ 7-5
Dial-up via VPN................................................................... 7-5
Dial-up via ISDN.................................................................. 7-5
Instructions for LANconfig.......................................... 7-5
Instructions for WEBconfig......................................... 7-6
Security settings 8-1
The security settings wizard....................................... 8-1
Wizard for LANconfig .......................................................... 8-1
Wizard for WEBconfig ......................................................... 8-2
VIII
The firewall wizard ..................................................... 8-2
Wizard for LANconfig........................................................... 8-3
Configuration under WEBconfig .......................................... 8-3
The security checklist................................................. 8-3
Troubleshooting 9-1
No DSL connection is established ............................. 9-1
DSL data transfer is slow ........................................... 9-1
Unwanted connections under Windows XP ............... 9-2
Appendix 10-1
Performance data and specifications ............... 10-1
Contact assignment ................................................. 10-2
ADSL interface .................................................................. 10-2
ISDN interface ⌧.............................................................. 10-3
ISDN interface .............................................................. 10-3
ISDN/Analog interface ⌧.................................................. 10-3
Analog interface ............................................................ 10-4
Ethernet interface 10/100Base-TX .................................... 10-4
Configuration interface (Outband) ..................................... 10-5
Declaration of conformity ......................................... 10-5
Introduction 1-1
1Introduction
Swyx VoIP Routers are fully functional routers with an integrated
firewall to provide local networks with secure access to the Internet.
With the VPN option included, these devices work as powerful
Dynamic VPN gateways for external locations or mobile users.
Along with the ADSL connection, these devices also feature ISDN
connections, and some feature analog telephone connections. An
ISDN line can be used to backup the WAN connection, for remote
management of the router, as a basis for office communications via
LANCAPI, and for establishing Dynamic VPN connections to
external locations that use dynamic IP addresses.
By using the Voice over IP function, these devices can transfer voice
data over broadband Internet as well as over ISDN and analog
telephone connections.
1.1 How do ADSL and ADSL 2+ work?
ADSL (Asymmetric Digital Subscriber Line) is currently the most
common technology for broadband Internet connections. Standard
and almost ubiquitous telephone lines (analog or DSL) are the basis
for DSL data transfer to the nearest telephone exchange. From here,
the data is passed directly on to the Internet over high-speed
connections.
The asymmetric DSL variant ADSL was developed for applications
where users receive large amounts of data but transmit only small
amounts, such as when surfing in the WWW. ADSL subscribers can
receive data at up to 8 Mbps ("downstream") and transmit at up to
800 kbps ("upstream"). ADSL providers are able to reduce these
maximum rates as they please.
To satisfy the strongly increasing demand for higher bandwidths, the
standards ADSL 2 and ADSL 2+ provider higher data rates as a basis
for applications such as video streaming or high-definition TV
(HDTV) over the Internet. Depending on the Internet provider,
ADSL 2 devices support downstream data rates of up to 12 Mbps,
and ADSL 2+ devices support up to 24 Mbps. Handshake routines
during connection establishment ensure that the standards ADSL,
ADSL 2 and ADSL 2+ are intercompatible.
Parallel to data transfer, ADSL also provides full and unlimited
support for the classic applications in telephony (telephone, fax,
1-2 How do ADSL and ADSL 2+ work?
answering machine, PBX). This is facilitated by splitters which
separate the voice frequencies from the data frequencies.
The Swyx VoIP Router features an integrated modem for
ADSL/ADSL 2+. It can be directly connected to the splitter with the
supplied cable.
ADSL can operate over both ISDN- and analog telephone lines
(POTS – Plain Old Telephone Service). Devices with an integrated
modem are supplied in two versions. Information about the supported
telephone system is to be found on the type designation on the
underside of the device. The device name is marked on the label
along with a suffix which indicates the supported telephone system:
Annex A-type devices are exclusively to be operated at ADSL-over-
POTS connections. Annex B-type devices are exclusively to be
operated at ADSL-over-ISDN connections. Your network operator
will be able to inform you of the version you need. These devices
cannot be altered or upgraded to a system other than that for which it
is equipped.
There are even ADSL-over-ISDN connections which are not
combined with an ISDN connection, but with a standard analog
telephone connection instead. In Germany, for instance, all T-DSL
connections from Deutsche Telekom AG are implemented as ADSL-
over-ISDN connections.
Suffix Supported telephone sys-
tem
'Annex A' ADSL-over-POTS
'Annex A' ADSL-over-ISDN
Internet
Splitter
Router with integrated
ADSL modem
Telephone
PSTN
Splitter
ADSL prover
Switching
nodes
DSLAM
Subscribers
What does VPN offer? 1-3
1.2 What does VPN offer?
A VPN (Virtual Private Network) can be used to set up secure data
communications over the Internet.
The following structure results when using the Internet instead of
direct connections:
All participants have fixed or dial-up connections to the Internet.
Expensive dedicated lines are no longer needed.
1. All that is required is the Internet connection of the LAN in the
headquarters. Special switching devices or routers for dedicated
lines to individual participants are superfluous.
2. The subsidiary also has its own connection to the Internet.
3. The RAS PCs connect to the headquarters LAN via the Internet.
The Internet is available virtually everywhere and typically has low
access costs. Significant savings can thus be achieved in relation to
switched or dedicated connections, especially over long distances.
The physical connection no longer exists directly between two
participants; instead, the participants rely on their connection to the
Internet. The access technology used is not relevant in this case:
Broadband technology such as DSL (Digital Subscriber Line) is
ideal. A conventional ISDN line can be used, too.
The technologies of the individual participants do not have to be
compatible to one another, as would be the case for conventional
Headquar-
Computers using remote access
Internet
LAN
LAN
Branch office
1-4 Firewall
direct connections. A single Internet access can be used to establish
multiple simultaneous logical connections to a variety of remote
stations.
The resulting savings and high flexibility makes the Internet (or any
other IP network) an outstanding backbone for a corporate network.
1.3 Firewall
The integrated stateful-inspection firewall is an effective barrier to
unwanted data traffic as it only permits the entry of data as a response
to outgoing data traffic. The IP masquerading function in the router
conceals LAN workstations accessing the Internet behind a single
public IP address. The true identities (IP addresses) of the individual
workstations remain masked. Router firewall filters allow the
blocking of individual IP addresses, protocols and ports. MAC
address filters also offer effective control over the access of LAN
workstations to the IP routing functions in the device.
Further important features in the firewall are:
• Intrusion detection
Attempts to break in to the local network or central firewall are
recognized, repelled and recorded by the Intrusion Detection
System (IDS) in the SwyxConnect. There is a choice of alarms
including in-device logging, e-mail messaging, SNMP traps or
SYSLOG alarms.
• Denial-of-Service protection
In addition to conventional break-ins, attacks from the Internet
may aim to block the availability of individual services. For this
reason, the SwyxConnect router is equipped with appropriate
security mechanisms to recognize popular hacker attacks and
guarantee router functionality.
Firewall
Internet
LAN
SwyxConnect
Voice over IP 1-5
• Quality of Service/traffic management
The term Quality of Service (QoS) embraces a range of func-
tions in your SwyxConnect. QoS functions consider the power-
ful classification methods used by firewalls (e.g. restriction to
subnets, individual workstations or certain services). These
enable Quality of Service to be very precisely controlled.
By guaranteeing a minimum bandwidth, precedence can be assi-
gned to enterprise-critical applications, VoIP telephony or cer-
tain user groups.
Details about the functions of the SwyxConnect stateful-inspection
firewall are available in the reference manual.
1.4 Voice over IP
The term Voice over IP (VoIP) refers to voice communications over
computer networks based on the Internet protocol (IP). The core idea
is to provide the functions of traditional telephony via cost-effective
and wide-spread networking structures such as the Internet. VoIP
itself is not a standard, rather it is a collective term for the various
technologies (equipment, protocols, voice encoding, etc.) which
make voice communications in IP networks possible.
1.4.1 Example Applications
Voice over IP solutions offers advantages across a broad spectrum of
applications, starting with small companies and extending to large
corporations with extensive networks of subsidiaries. In the following
section, we will demonstrate a number of examples.
Detailed information about configuration is available in the chapter
'Configuration of VoIP functions' or in the LCOS reference manual.
1.4.1.1 Supplementing existing PBXs
VoIP functions can be conveniently added in to existing telephone
structures by using a Swyx VoIP Router. The Swyx VoIP Router is
simply connected between the public exchange line (e.g. ISDN
NTBA or analog telephone line) and the PBX.
1-6 Voice over IP
Telephone calls over the PBX and the telephones connected to it
remain possible just as before; the telephones remain available under
the familiar telephone numbers. This application additionally offers
the following options:
• In addition to the ISDN and analog telephones, VoIP telephones
or VoIP softphones can be included in the telephone
infrastructure.
• VoIP subscribers in the internal LAN are also able to call
external PSTN subscribers.
• The ISDN and analog telephones continue to function, and
additionally they can call all of the internal VoIP telephones
and softphones in the LAN.
• Calls to external SIP subscribers who use the same Internet
provider are often available at no cost.
• With the appropriate connection to a public SIP provider, any
other SIP subscriber worldwide can be called, irrespective of the
provider network. As an alternative to a direct telephone
connection, public telephone network subscribers can also be
reached over a diversion via the SIP provider. The costs depend
on the provider's particular tariff models. Frequently, long-
distance and overseas calls via an SIP provider are significantly
cheaper than the traditional telephone connection.
In this constellation, the Swyx VoIP Router takes over the switching
of the calls. The device can be individually configured, for example,
ISDN PBX
Swyx VoIP Router bet-
ween NTBA and PBX
Internet
Example: ISDN PBX
ISDN telephones
VoIP telephoneVoIP softphone
ISDN net-
work subscri-
bers
Public SIP provider
ISDN NTBA
Analog fax
machines and
telephones
PSTN
Voice over IP 1-7
to use the access codes to decide upon the switching of a call either
via the ISDN interface, or via the Internet as a VoIP call.
1.4.1.2 Connecting subsidiaries or home offices to the headquarters
Many subsidiaries or home offices already have a connection to the
network at headquarters over VPN. These connections are normally
limited to conventional data transmission. By using VoIP, internal
company calls can be made for free over the existing VPN connection
and— thanks to the VPN encryption —these calls are secured against
eavesdropping.
With a Swyx VoIP Router located in the branch or home office, the
two worlds of traditional (ISDN and analog) and VoIP telephony can
be united in a single telephone: A VoIP telephone or an existing
analog or ISDN telephone can be used for free telephone calls via
VPN to the headquarters, or to make standard calls via the
conventional telephone network.
The advantages of a telephone connection to headquarters:
• The configuration of telephone functions can be carried out
centrally in the VoIP PBX at headquarters.
• Subscribers at their branch or home offices connect with the
central PBX.
• Calls within the company network are free.
• Outgoing calls are automatically directed to the optimal line for
cost optimization.
Swyx VoIP Router
Internet
VoIP telephone
VoIP PBX connected to
the ISDN network
VPN tunnel
VoIP telephones
SwyxConnect
Analog tele-
Branch office Headquarters
PSTN
Example: Branch office with analog telephone connection, headquarters with VoIP-capable PBX
1-8 Voice over IP
1.4.1.3 VoIP for companies through SIP trunking
One of the biggest hurdles for companies that fully migrate to VoIP is
to maintain the existing telephone numbers. Normal provider SIP
accounts come with a telephone number for the transition to the
landline telephone network, but generally these numbers are selected
from a pool of numbers available to the provider. However, for
companies with a large number of telephone subscribers and
numbers, it is of decisive importance that existing telephone and
extension numbers are maintained after migrating to VoIP.
With the SIP trunking function, entire ranges of telephone numbers
made up of external numbers and their associated extensions can be
mapped by Swyx VoIP Routers over a single connection to a SIP
provider, assuming that the provider also supports Direct Dialing In
(DDI) and can provide multiple connections simultaneously.
Generally speaking, SIP providers that offer SIP trunking can acquire
the existing telephone numbers from the former telecomms provider.
1.4.1.4 Connecting local exchange lines with a remote SIP gateway
Companies with nation-wide and internationally distributed sites are
often interconnected with VPN already. A Swyx VoIP Router can be
used not only to connect the SIP, ISDN and analog telephones at a
branch office to the SIP-PBX at headquarters; it can also integrate the
branch office's local telephone lines into corporate communications
with help of the "SIP Remote Gateway" function.
The SIP remote gateway is active for outgoing and incoming calls.
• A company headquarters in New York can, for example, use a
Swyx VoIP Router with SIP gateway located at the Los Angeles
branch office to telephone with customers and suppliers located
in Los Angeles at local rates ("local break-out").
• For improved availability to customers located abroad, the New
York headquarters can, for example, use a Swyx VoIP Router
with SIP remote gateway located at their sales office in Italy.
Customers can then reach support or service numbers via a
standard national telephone number. Calls over the local
exchange line are received and directed within the company
network to the responsible employee. Call routing can be used
which identifies the customer's calling number and
automatically selects the appropriate connection to be used for
forwarding the call.
Voice over IP 1-9
Advantages of the SIP remote gateway:
• The local telephone connection at any site is available for use by
any of the offices throughout the entire company.
• National and international long-distance calls can be mapped to
local or regional calls, so saving costs.
• Automatic routing of incoming calls to the responsible
employee.
1.4.1.5 Connecting sites without a SIP PBX
Companies with widely disperse offices and without their own SIP
PBX can also take advantage of VoIP site coupling. In this "Peer-to-
Peer" scenario, a Swyx VoIP Router has been implemented at both
locations.
Along with data transfer via VPN, it is also possible to use VoIP
functions between the two locations.
The advantages of peer-to-peer site coupling
• ISDN and analog PBXs at different locations can form a
common internal telephone network.
• An SIP PBX is not necessary.
• Calls within the company network are at no charge.
• Outgoing calls are automatically directed to the optimal line for
cost optimization.
• Incoming calls can be switched directly to the appropriate
employee at a different location.
Swyx VoIP
Router
Internet
Local telephone net-
work
VoIP PBX
VPN tunnel
VoIP telephones
SwyxConnect
Branch office Headquarters
1-10 Voice over IP
1.4.2 The central position of the Swyx VoIP Router
Swyx VoIP Router take up a central position in the switching of
telephone calls between internal and external subscribers over the
different channels of communication. Depending on the model and
equipment, the devices interconnect the following communication
participants and channels into a common telephone infrastructure.
1. Internal VoIP terminal devices connected to LAN, WLAN and
DMZ, such as SIP telephones and SIP softphones
2. The internal telephone infrastructure with ISDN or analog PBX
and ISDN and analog telephones
3. Analog terminal devices, internally connected either into the
ISDN network via a PBX with a/b ports, or alternatively into the
VoIP network over an ATA (Analog Telephone Adapter)
4. External SIP providers and all of the external subscribers attai-
nable via them
5. Upstream SIP PBXs with all of the internal and external subscri-
bers attainable through it
6. The external telephone world via an exchange line or upstream
PBX, and all of the external subscribers available via the land-line
network
Swyx VoIP Router
Internet
VoIP subscribers
VPN tunnel
VoIP subscribers
Swyx VoIP Router
ISDN PBX
ISDN telephones
Analog fax
machines and
telephones
Analog PBX
PSTN
Example: Sites with ISDN or analog lines
Analog
telephones
Voice over IP 1-11
1.4.2.1 Users and lines
Telephony subscribers in internal areas can take part in voice
communications and, in the SwyxConnect VoIP environment, are
referred to as "users". The SwyxConnect differentiates between:
• ISDN users
A maximum of 40 terminal devices connected over the ISDN
network, including ISDN and analog devices connected to an
upstream ISDN PBX.
When connecting downstream PBXs to point-to-point lines, the
number of possible ISDN subscribers is determined by the
length of the extension number (DDI). In this case, all of the
telephones and terminal equipment connected to the PBX can be
mapped with a single ISDN user entry.
• Analog users
Two devices connected to the analog interfaces
• SIP users
A maximum of 32 SIP terminal devices connected over LAN,
WLAN and DMZ and analog devices connected with an ATA.
The external paths of communication available to the users are
known as "lines". The SwyxConnect differentiates between the
following lines:
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1-12 Voice over IP
•ISDN
A connection to an ISDN NTBA over the TE interface. The NT
interface can additionally be used to connect ISDN terminal
devices directly or via a downstream ISDN PBX.
•Analog
A connection to an analog exchange line or to an extension line
of an upstream analog PBX.
• SIP lines
Maximum 16 SIP lines There are three different types of SIP
line:
• A "Single account" line acts like a normal SIP account with a
single telephone number. The internal users can all make use
this account for making SIP calls, although only one call can
be conducted at a time.
Depending on the provider services, these lines can be used to
reach subscribers in the provider networks, subscribers in other
SIP networks (partner networks), or even land-line subscribers.
Your own availability at your own telephone number or even
solely with an SIP name over the Internet also differs from pro-
vider to provider.
• A "trunk" line acts like an extended SIP account with a main
external telephone number and multiple extension numbers.
Internal users use this account in parallel and several calls can
be made simultaneously (until the maximum available
bandwidth is exhausted).
• As a "SIP gateway" line, the Swyx VoIP Router provides a
remote SIP PBX with a transition to the local ISDN network.
The SIP gateway is registered at the SIP PBX with a single
number, although several calls can be conducted at once
(until the maximum available bandwidth is exhausted). The
connection between the SIP PBX and the Swyx VoIP Router
is normally established over a VPN connection.
• A "link" line acts like a trunk line without limitation to one
main external telephone number and multiple extension
numbers. Internal users use this account in parallel and
several calls can be made simultaneously (until the maximum
available bandwidth is exhausted).
This manual suits for next models
2
Table of contents
