Gigaset N870 IP PRO Technical manual

Gigaset N870 IP PRO / LUG IE-UK_IM en / A31008-XXXXX-XXXX-X-XX / Cover_front.fm / 8/24/18
Version 2, 06.08.2010 / ModuleVersion 1.0
N870 IP PRO
Multicell System
Site Planning and Measurement Guide

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Version 2, 06.08.2010 / ModuleVersion 1.0
Table of Contents
Gigaset N870 IP PRO / LUG IE-UK_IM en / A31008-XXXXX-XXXX-X-XX / Measure_kitIVZ.fm / 8/24/18
Table of Contents
Safety precautions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
The Gigaset N870 IP Multicell System. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Criteria for an optimum DECT wireless network. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
How to proceed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Projecting the DECT network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Determining the requirements for the telephone network . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Conditions for the positioning of the base stations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
Preliminary identification of the positions of the base stations . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Taking measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Defining thresholds. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Measuring the wireless range of the planned base stations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Evaluating measurements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Working with the Gigaset N720 SPK PRO . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Checking the package contents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Further recommended accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Before you begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Setting up the measuring base station . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Starting up the measuring handset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
Operating the measuring handset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
DECT installations in special environments . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
Customer service and help . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Questions and answers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Environment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
Appendix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Care. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Contact with liquid . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Approval . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Technical details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 53
Glossary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 54
Index . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58

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Safety precautions
Safety precautions
Read the safety precautions and the user guide before use.
Comprehensive user guides for all telephones and telephone systems as well as for accessories
can be found online at gigasetpro.com in the Support category. We thereby help to save paper
while providing fast access to the complete up-to-date documentation at any time.
The device cannot be used in the event of a power failure. In case of a power failure it is also not
possible to make emergency calls.
Emergency numbers cannot be dialled if the keypad/display lock is activated!
The handset must not be operated if the battery cover is open.
Do not use the devices in environments with a potential explosion hazard (e.g. paint shops).
The devices are not splashproof. For this reason do not install them in a damp environment such as
bathrooms or shower rooms.
Use only the power adapter indicated on the device.
Whilst charging, the power socket must be easily accessible.
Use only the cable supplied for LAN connection and connect it to the intended ports only.
Remove faulty devices from use or have them repaired by our Service team, as these could interfere
with other wireless services.
Do not use the device if the display is cracked or broken. Broken glass or plastic can cause injury to
hands and face. Send the device to our Service department to be repaired.
Keep small cells and batteries, which can be swallowed, out of the reach of children.
Swallowing a battery can lead to burns, perforation of soft tissue and death. Severe burns can occur
within 2 hours of swallowing.
In the case of a swallowed cell or battery, seek medical care immediately.
Using your telephone may affect nearby medical equipment. Be aware of the technical conditions
in your particular environment, e.g. doctor's surgery. If you use a medical device (e.g. a pacemaker),
please contact the device manufacturer. They will be able to advise you regarding the susceptibility
of the device to external sources of high frequency energy (for the specifications of your Gigaset
product see "Technical data").

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Introduction
Gigaset N870 IP PRO / LUG IE-UK_IM en / A31008-XXXXX-XXXX-X-XX / intro.fm / 8/24/18
Introduction
This document explains the preparations necessary to install a multi-cell DECT network and take
measurements for the optimum positioning of the base stations. It also provides technical and
practical background information.
The Gigaset N870 IP Multicell System
The Gigaset N870 IP Multicell System is a DECT multi-cell system for connecting DECT base
stations to a VoIP PABX. It combines the options of IP telephony with the use of DECT telephones.
Components
The following figures shows the components of the Gigaset N870 IP Multicell System and how
they are embedded in the IP phone environment:
PABX
DECT base stations
Gigaset N870 IP PRO
Configuration from
web interface
LAN
IP phones
Gigaset
handsets
DECT integrator /
DECT manager
DECT integrator
(virtual machine)
Handover & roaming
Small/medium-sized installation
Large installation
DECT
manager

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Introduction
•DECT integrator
Central management and configuration unit of the DECT multi-cell system.
The DECT integrator
•integrates the base stations of multiple DECT managers in one roaming domain
•contains the central database for the DECT subscribers
•provides a web interface for configuring the subscribers
•enables access for configuration of all DECT managers and the synchronisation hierarchy
of the base stations
In small and medium-sized installations, the integrator and DECT manager are on the same device.
For large installations, the integrator is provided as a virtual machine.
•DECT manager
Management station for a group of base stations. At least one DECT manager must be used
in every installation. Up to 100 DECT managers can be used in large installations.
The DECT manager
•manages synchronisation of the base stations within clusters
•acts as an application gateway between SIP and DECT signalising
•controls the media path from the phone system to the relevant base stations
•DECT base stations
•form the wireless cells of the DECT phone network
•provide media processing from the handsets directly to the phone system
•make available connection channels for the handsets (the number is dependent
on various factors, such as bandwidth approved)
(refer to Section Capacity ¢P. 1 0 )
•Gigaset handsets
•Up to 250 handsets can be connected per DECT manager; up to 60 DECT calls can be held
simultaneously (VoIP calls, and phone book or Info Centre accesses). Information on the
functions of certain handsets on Gigaset base stations is available from
wiki.gigasetpro.com.
•Subscribers can accept or initiate calls in all DECT cells with their handset (Roaming),
and can also switch between the DECT cells during a call (Handover). A handover is only
possible when the cells are synchronised.
•Phone system
Connect your DECT phone system to a VoIP phone system, e.g.:
•your own PABX (on-premise solution)
•a virtual phone system from an external provider (Cloud solution, hosted PBX)
•VoIP provider
The phone system
•establishes the connection to a public phone network
•enables central management of phone connections, directories, network mailboxes, ...

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•Cluster forming
A cluster comprises a number of base stations of a DECT manager that synchronise with each
other to enable handovers, roaming and load balancing.
Handovers and load balancing can only be realised by base stations that are synchronised
with each other.
A DECT manager normally manages a cluster.
The DECT Manager is connected to the base stations and the PABX via the local network and
is therefore not dependent on DECT ranges. Base stations that are far apart can be grouped
into different clusters if synchronisation is barely, or not, possible, and is not required. All the
base stations of a DECT manager must belong to the same LAN subnet of the DECT manager.
For installations in different LAN subnets, multiple DECT managers with one DECT manager
per subnet are required. The DECT manager function can be installed in parallel on the same
device (depending on the capacity of the local base station). Multiple DECT managers are
also required when the requirement is to connect more than 250 handsets or provide more
than 60 connection channels.
Handover: The DECT connection of a handset is passed to another base station during
a call.
Roaming: A handset in idle mode is connected to the system via a new base station.
Load balancing: A DECT connection is not set up with the current base station for a call,
for administration or for other customer-specific purposes because it is
overloaded with active DECT or media connections. It is instead set up with
a neighbouring base station having free resources.
LAN
DECT
Manager
Cluster 1
LAN
DECT
manager
Cluster 1 Cluster 2

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Introduction
In installations with multiple DECT managers, handover and roaming between base
stations of different DECT managers are possible when the clusters are synchronised.
Load balancing is not possible. For more information on this, refer to Section Using multiple
DECT managers ¢P. 1 6 .
Installations
Different build levels of the Gigaset N870 IP Multicell System can be installed.
LAN subnet 2
DECT
manager 1
Cluster 1
Cluster 1
LAN subnet 1
DECT
manager 2
and base
station
Small
Device with INT + DM
with enabled
DECT base station
Medium
Device with INT + DM
without DECT base station
Large – XXL
Virtualised integrator
. . . . .
. . . . .
. . . . . . . . . .
DM
1DM 2DM 10 DM 100
20,000
INT
DM
. . . . .
. . . . . . . . . .
250
1
INT
DM
BS 1
BS
2. . . .. . . BS 10 BS 1BS 2BS 60 BS 1BS 60 BS 600 BS 6000
2... ...1 2 3
. . . . . . . . . .
50
12...
INT = Integrator, DM = DECT manager, BS = Base station

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For further information about the options provided by the Gigaset N870 IP Multicell System,
and about installing, configuring and operating the Gigaset devices mentioned, see the relevant
user guide. These are provided on wiki.gigasetpro.com.
Gigaset offers the Gigaset N720 SPK PRO (Site Planning Kit) to help you with measuring the
wireless coverage and quality of your DECT network. For information on setting up and using
the Gigaset measuring equipment, refer to Section Working with the Gigaset N720 SPK PRO
¢P. 3 7 .
Criteria for an optimum DECT wireless network
A carefully planned DECT wireless network with adequate coverage is the prerequisite for
operating a telephone system that offers good call quality and sufficient call options for
all subscribers in all buildings and areas belonging to the PABX.
It is difficult to assess the technical wireless conditions of a DECT installation in advance as they
are influenced by many environmental factors. Therefore, the specific circumstances on-site
must be determined by taking measurements. This leads to a reliable conclusion about the
material required as well as the locations of the wireless units.
Various aspects need to be taken into consideration when planning a DECT wireless network.
The following requirements must be considered when deciding how many base stations are
required and where they should be placed:
•Sufficient DECT wireless coverage of the entire site so that every subscriber can be reached.
•Sufficient wireless channels (DECT bandwidth), in particular in "hotspots", to avoid capacity
bottlenecks.
•Sufficient overlap of cells to enable synchronisation of the base stations and to guarantee
freedom of movement for subscribers when making calls.
Component Small Medium Large
Base stations Up to 10
BS functionality can be
enabled on the INT/DM
Up to 60 Up to 6,000
Up to 60 per DM
Handsets Up to 50 Up to 250 per DM Up to 20,000
DECT manager Integrator and DECT manager on the same device Up to 100
Integrator Virtual machine

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Introduction
Wireless coverage
The selection of locations where the base stations are to be installed should guarantee optimum
wireless coverage and enable cost-effective wiring.
Optimum wireless coverage is achieved if the required reception quality is delivered at all points
of the wireless network. If costs need to be considered, this should be done with a minimum
number of DECT base stations.
To ensure an interference-free switch of call connections from one cell to another (handover),
there must be an area where good reception is ensured for both base stations. To achieve this,
a minimum quality for reception must be defined.
Signal transmission
The ideal signal transmission of a base station
is shaped like a ring, i.e., so that the registered
handsets can be the same distance away from
the base station in all directions without the
wireless signal being interrupted.
The range is actually influenced by a variety of
environmental conditions. For example, obstacles
such as walls or metal doors can impede the wireless
signals or interfere with their uniform transmission.
You should investigate the actual conditions that
the planned wireless network will be subjected
to by measuring the signal transmission of the
measuring base station at appropriate positions.
Wireless cell
Base station
Overlap

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Capacity
The capacity of the cells must be high enough to guarantee that the subscribers can be reached
in high-density traffic. A cell is at full capacity when the number of connections required for each
base station is higher than the number of possible connections.
On the one hand, the number of parallel connections possible is dependent on the approved
codecs that can be used for the connections. Which codecs are approved can be set from the
web interface. The device function also has a bearing on capacity. A Gigaset N870 IP PRO can
only be deployed as a base station, a DECT manager with base station, or an integrator with
DECT manager and base station. Also note that a DECT manager can manage a maximum
of 60 connection channels in parallel.
The following table shows the maximum number of possible connections in relation to the
device function and approved codecs.
Narrowband mode ¢P. 57 ; Broadband mode ¢P. 5 4
There are two options for increasing capacity:
•Reducing the distance between the base stations.
This means that the cells overlap more, giving
the subscriber access to the base stations
of the neighbouring cells. This results in more
even wireless quality. However, this can result
in considerable installation costs for an
existing system.
•Installing parallel base stations.
The cell size remains generally constant but
the number of possible connections increases.
Installing the base stations close to one another
means that the additional assembly costs are
low. A minimum distance between base
stations must be observed however
(£Technical conditions, P. 16).
To keep the costs low for the devices, and for installation and maintenance, the typical requirement
is to keep the number of base stations as low as possible. Despite this, as much as necessary needs
to be planned to safeguard capacity and wireless coverage.
Approved codecs Only BS BS + DM Base + DM + INT
G.711 only 10 8 5
G.729 and G.711 8 5 5
G.722 and G.729 and G.711 5 5 5
When the system is first delivered, all codecs are approved in the configuration.
Broadband codec G.722 needs to be enabled explicitly however.