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LANCOM 1722 VoIP
LANCOM 1723 VoIP
LANCOM 1724 VoIP
LANCOM 1823 VoIP
© 2007 LANCOM Systems GmbH, Wuerselen (Germany). All rights reserved.
While the information in this manual has been compiled with great care, it may not be deemed an assurance of product
characteristics. LANCOM Systems shall be liable only to the degree specified in the terms of sale and delivery.
The reproduction and distribution of the documentation and software included with this product is subject to written per-
mission by LANCOM Systems. We reserve the right to make any alterations that arise as the result of technical develop-
ment.
All explanations and documents for registration of the products you find in the appendix of this documentation, if they
were present at the time of printing.
Trademarks
Windows
®
, Windows Vista™, Windows XP
®
and Microsoft
®
are registered trademarks of Microsoft, Corp.
The LANCOM Systems logo, LCOS and the name LANCOM are registered trademarks of LANCOM Systems GmbH. All other
names mentioned may be trademarks or registered trademarks of their respective owners.
This product includes software developed by the OpenSSL Project for use in the OpenSSL Toolkit http://www.openssl.org/
.
This product includes cryptographic software written by Eric Young (eay@cryptsoft.com
).
This product includes software developed by the NetBSD Foundation, Inc. and its contributors.
Subject to change without notice. No liability for technical errors or omissions.
LANCOM Systems GmbH
Adenauerstr. 20/B2
52146 Wuerselen
Germany
www.lancom.eu
Wuerselen, September 2007
110570/0907
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Preface
4
EN
Intelligent call routing and number translation
Support of point-to-point and point-to-multipoint connections to the
ISDN network
Multiple configurable ISDN interfaces (NT/TE), some with life-line support
and power relay to the internal ISDN bus
WLAN compliant to the standards IEEE 802.11a/h or IEEE 802.11b/g
Information about your model's functionality in detail is available from the
table 'Just what can your LANCOM VoIP Router do?'.
LANCOM products undergo continuous development. For precise
information about their features and for the latest version of the LCOS
operating system, please visit the LANCOM website.
Model variants
This documentation is to be used for different models:
LANCOM 1722 VoIP
LANCOM 1723 VoIP
LANCOM 1724 VoIP
LANCOM 1823 VoIP
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 clas-
sified under the general term LANCOM 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 protec-
tion) that were not already activated when you purchased the product. The
LANconfig Wizard 'Security Settings' will help you with this task. Further infor-
mation is also available in the chapter 'Security settings'.
We would additionally like to ask you to refer to our Internet site
www.lancom.eu
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 the following parts:
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Preface
5
EN
Installation guide
User manual
PBX Functions manual
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 PBX Functions manual gives you detailed step-by-step instructions on
commissioning a LANCOM VoIP Router as a PBX (private branch exchange) for
a single location. Also described are the main operating instructions for users,
and how to connect terminal equipment.
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 exam-
ple:
The system design of the operating system LCOS
Configuration
Management
Diagnosis
Security
Routing and WAN functions
Firewall
Quality of Service (QoS)
Virtual Private Networks (VPN)
Virtual Local Networks (VLAN)
Wireless networks (WLAN)
Voice communication in computer networks with Voice over IP (VoIP)
Backup solutions
LANCAPI
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
LANCOM
product.
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter :
6
EN
In case you encounter any errors, or just want to issue critics enhancements,
please do not hesitate to send an email directly to:
info@lancom.eu
Our online services www.lancom.eu 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 infor-
mation. The latest drivers, firmware, utilities and documentation are
constantly available for download.
In addition, LANCOM support is available. For telephone numbers and
contact addresses of LANCOM support, please see the enclosed leaf-
let or the LANCOM Systems website.
Information symbols
Very important instructions. Failure to observe this may result in damage.
Important instruction that should be observed.
Additional information that may be helpful but which is not required.
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Contents
9
EN
7 Providing dial-in access 74
7.1 Which information is required? 74
7.1.1 General information 75
7.1.2 Settings for TCP/IP 76
7.1.3 Settings for IPX 77
7.1.4 Settings for NetBIOS routing 77
7.2 Settings for the dial-in computer 78
7.2.1 Dial-up via VPN 78
7.2.2 Dial-up via ISDN 78
7.3 Instructions for LANconfig 78
7.4 1-Click-VPN for LANCOM Advanced VPN Client 79
7.5 Instructions for WEBconfig 80
8 Point-to-point connections 81
8.1 Antenna alignment for P2P operations 82
8.2 Configuration 84
8.3 Access points in relay mode 86
8.4 Security for point-to-point connections 86
8.4.1 Encryption with 802.11i/WPA 86
8.4.2 LEPS for P2P connections 88
9 Sending faxes with LANCAPI 89
9.1 Installation of the LANCOM CAPI Faxmodem 90
9.2 Installation of the MS Windows fax service 91
9.3 Sending a fax 91
9.3.1 Send a fax with any given office application 91
9.3.2 Send a fax with the MS Windows fax service 92
10 Options and accessories 93
10.1 Optional LANCOM WLAN antennas 93
10.1.1 Antenna Diversity 93
10.1.2 Installation of AirLancer Extender antennas 94
10.2 LANCOM Public Spot Option 94
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
11
EN
1Introduction
LANCOM 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.
Nur LANCOM 1823
VoIP
LANCOM Wireless Routers and LANCOM Access Points can be oper-
ated either as self-sufficient access points with their own configura-
tion (WLAN modules in "Access Point mode") or as components in a
WLAN infrastructure, which is controlled from a central WLAN Con-
troller ("managed mode"). Please observe the corresponding notices
in this documentation.
1.1 How do ADSL and ADSL 2+ work?
ADSL (Asymmetric Digital Subscriber Line) is currently the most common tech-
nology for broadband Internet connections. Standard and almost ubiquitous
telephone lines (analog or DSL) are the basis for DSL data transfer to the near-
est telephone exchange. From here, the data is passed directly on to the Inter-
net 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 stand-
ards ADSL 2 and ADSL 2+ provider higher data rates as a basis for applica-
tions 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. Hand-
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
13
EN
In Germany, for instance, all T-DSL connections from Deutsche Telekom AG are
implemented as ADSL-over-ISDN connections.
1.2 What does VPN offer?
A VPN (Virtual Private Network) can be used to set up secure data communi-
cations over the Internet.
The following structure results when using the Internet instead of direct con-
nections:
All participants have fixed or dial-up connections to the Internet. Expensive
dedicated lines are no longer needed.
All that is required is the Internet connection of the LAN in the headquar-
ters. Special switching devices or routers for dedicated lines to individual
participants are superfluous.
The subsidiary also has its own connection to the Internet.
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 ded-
icated connections, especially over long distances.
Headquarters
Computers using remote access
Internet
LAN
LAN
Branch office
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
24
EN
The precise number of users and lines available varies between mod-
els and software options.
1.4.3 VoIP characteristics of the LANCOM VoIP Routers
Multiple ISDN/analog interfaces
The ISDN/analog interfaces of the LANCOM VoIP Router can be switched as
internal or external connections and, depending on the model, offer up to
eight parallel voice channels. This allows, for example, an existing PBX to be
additionally equipped with SIP and connected to an upstream VoIP PBX. Sub-
scribers can simultaneously make calls via ISDN and analog telephones, SIP
equipment, or softphones to other telephone subscribers, both internally and
externally. The transition between SIP and ISDN/analog is automatic and
invisible to the user.
Telephone even during a power cut
With life-line support and power relay to the internal ISDN port, it remains
possible to telephone over the conventional telephone network even in case
of a power outage. ISDN backup, load balancing and VRRP in combination
with Ethernet ports as WAN interfaces provide SIP connections with redun-
dancy and high reliability. If a SIP remote station should fail, switching auto-
matically reverts to the conventional telephone network. This ensures that
telephony is just as reliable as ever, even with VoIP.
Point-to-multipoint and point-to-point connections with ISDN
For ISDN, LANCOM VoIP Routers support point-to-multipoint and
point-to-point connections:
Point-to-multipoint connection (point-to-multipoint): Up to 8 ISDN termi-
nal devices can be connected to this type of connection. Terminal equip-
ment can include ISDN telephones and ISDN PBXs, which can be used for
connecting yet more equipment. As an alternative, a LANCOM VoIP
Router can be connected to a point-to-multipoint connection.
Point-to-point connection (point-to-point): This type of device is suitable
for the connection of one ISDN device only, generally an ISDN PBX. As an
alternative, a LANCOM VoIP Router can be connected to a point-to-point
connection.
To connect a LANCOM VoIP Router, the interface that is used is set up for the
type of line in use.
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
25
EN
Equipment connected to an ISDN connection can be addressed in two ways:
The devices are addressed with a multiple subscriber number (MSN) that
is linked to the ISDN connection and cannot be influenced.
Terminal devices are addressed via a Direct Dialing In-Number (DDI).
However, only the main external number is associated with the telephone
line; the extension numbers that address the individual terminal devices
can be chosen at will and are merely suffixes to the main number. The
main number, extension and area selection code (not including the lead-
ing zero) can be at the most 11 characters long.
The terms "point-to-multipoint connection" and "point-to-point con-
nection" are used in many countries to describe the technical imple-
mentation of point-to-multipoint with MSN and point-to-point with
DDI. Other countries may use different types of connection and other
combinations of protocol and call-number type, or even different
names. Please refer to your telephone network operator for the tech-
nical specifications of your ISDN connection.
Bandwidth reservation with failover
High-performance VPN functions allow the reliable transmission of voice and
data between company sites. This spares the telephone bill from internal com-
munications. A professional firewall, versatile routing functions and excellent
Quality of Service mechanisms make the LANCOM VoIP Router a comprehen-
sive solution for secure voice and data communication in a single compact
device. All functions are integrated into the central management functions.
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
26
EN
1.5 Just what can your LANCOM do?
The following table provides a comparison of the properties and functions of
your device.
LANCOM
1722 VoIP
LANCOM
1723 VoIP
LANCOM
1724 VoIP
LANCOM
1823 VoIP
Applications
Internet access
✔✔✔✔
LAN-LAN coupling over VPN
✔✔✔✔
LAN-LAN coupling over ISDN
✔✔✔✔
RAS server (over VPN)
✔✔✔✔
RAS server (over ISDN)
✔✔✔✔
IP router
✔✔✔✔
IPX router (over ISDN), for example for coupling Novell net-
works or for dialing in to Novel networks
✔✔✔✔
NetBIOS proxy for coupling Microsoft peer-to-peer networks
over ISDN
✔✔✔✔
DHCP- and DNS server (for LAN and DMZ)
✔✔✔✔
Advanced Routing and Forwarding (ARF networks) 8 8 8 8
N:N mapping for routing networks with the same IP-address
ranges over VPN
✔✔✔✔
Configuring LAN ports as additional WAN ports
✔✔✔✔
Policy- based routing
✔✔✔✔
Load balancing for bundling multiple DSL channels 4
channels
2
channels
2
channels
2
channels
Backup solutions and load balancing with VRRP
✔✔✔✔
PPPoE server
✔✔✔✔
WAN RIP
✔✔✔✔
Rapid Spanning Tree Protocol
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
27
EN
Layer-2 QoS Tagging
✔✔✔✔
802.1p
✔✔✔✔
NAT Traversal (NAT-T)
✔✔✔✔
DMZ with configurable IDS checks
✔✔✔✔
ISDN leased lines
✔✔✔✔
LANCAPI server to provide office applications such as fax or
answering machine via the ISDN interface.
✔✔✔✔
VoIP functions
SIP proxy and
registrar
Management of local SIP users (registra-
tion/authentication)
✔✔✔✔
Mapping of public SIP-provider accounts
as telephone lines
✔✔✔✔
SIP trunking for mapping SIP accounts
with external root numbers and exten-
sions.
✔✔✔✔
Registration at and switching to upstream
SIP PBXs
✔✔✔✔
Individual/shared password for authentica-
tion
✔✔✔✔
Automatic registration and forwarding of
SIP users
✔✔✔✔
Automatic bandwidth management and
prioritization of SIP connections
✔✔✔✔
Number of local SIP subscribers (on deliv-
ery, upgrade for 32 SIP subscribers with
LANCOM VoIP-32 Option)
8888
SIP gateway Free choice from available ISDN S
0
buses
✔✔✔✔
Operation at exchange lines or extension
lines
✔✔✔✔
Operation at ISDN point-to-multipoint
lines or ISDN point-to-point lines
✔✔✔✔
Automatic registration and authentication
of local ISDN subscribers as SIP users, max.
number of mapping entries
40 40 40 40
LANCOM
1722 VoIP
LANCOM
1723 VoIP
LANCOM
1724 VoIP
LANCOM
1823 VoIP
LANCOM 1722 VoIP – LANCOM 1723 VoIP – LANCOM 1724 VoIP – LANCOM 1823 VoIP
Chapter 1: Introduction
28
EN
Automatic registration and authentication
of analog users as SIP users at upstream
SIP PBXs, max. number of mapping entries
–2–2
Switching between local and remote ISDN,
analog and SIP users
✔✔✔✔
Remote gateway function for mapping
local exchange lines to a remote SIP PBX
✔✔✔✔
ISDN supplementary services CLIP, CLIR
✔✔✔✔
En-block and individual dialing with
adjustable wait time until completion
✔✔✔✔
Inband tone signaling according to Euro-
pean and German standards with country
profiles
✔✔✔✔
Call router Central switching of all connections (SIP
and ISDN/analog)
✔✔✔✔
Number translation by mapping, numeral
replacement and number supplementation
✔✔✔✔
Rules for routing according to dialed, out-
going call number, line and domain
✔✔✔✔
Multiple cycles, also forced after number
replacement
✔✔✔✔
Up to three destinations per routing rule
(double backup)
✔✔✔✔
Rule-based rejection of calls
✔✔✔✔
Supplementation of call-number prefixes
per line
✔✔✔✔
Supplement/remove root numbers per line
✔✔✔✔
Voice process-
ing
Echo canceling and de-jitter buffer for SIP
connections
✔✔✔✔
Transparent pass-through for negotiated
codecs
✔✔✔✔
Interaction on codec negotiation (filter,
quality, bandwidth)
✔✔✔✔
WAN connections
Connector for DSL or cable modem
✔✔✔✔
LANCOM
1722 VoIP
LANCOM
1723 VoIP
LANCOM
1724 VoIP
LANCOM
1823 VoIP
4


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