SpectraLink IP-DECT SERVER 400 Quick reference guide

Spectralink DECT/IP-DECT Server 400/6500/2500/8000
Synchronization and Deployment Guide
14169000 Version 9.3
October, 2016

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Introduction
Scope ......................................................................................................................................................3
About Synchronization.......................................................................................................................3
Types of Synchronization ..............................................................................................................................3
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documentation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Terminology and Acronyms . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4
4
4
Off-site planning, prior to visit
If the customer wants to replace existing DECT/IP-DECT system: . . . . . . . . . . . . . . . . .
6
Is it an IP-DECT base station or a digital base station?: ..........................................................................6
Investigate site ................................................................................................................................................6
“Conclusion”.....................................................................................................................................................8
On-site Investigation
Aligning expectations with customers...........................................................................................9
On-site Deployment
Deployment Tools . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Important parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deployment rules of thumb . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
IP Base Station using Synchronization Over The Air . . . . . . . . . . . . . . . . . . . . . . . . .
11
13
13
14
Deployment procedure.................................................................................................................................14
Placement of base stations.........................................................................................................................16
Digital Base Stations and IP Base Stations using LAN Synchronization...........................17
Deployment procedure.................................................................................................................................18
Placement of base stations.........................................................................................................................20
LAN Based Radio Synchronization
Precision Time Protocol Background . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deployment of Base Stations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Network Requirements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
24
25
25
Multicast.........................................................................................................................................................26
Timing and Jitter ...........................................................................................................................................26
Network topology ………………………………………………………………………………………..…27
Traffic Load ….……………………………...………………………………………………………………27
Quality and Configuration of the Switches ………………………………………………………………28
Traffic Priority ……………………………………………………………………………………………….28

Configuration and Administration.................................................................................................28
DECT/IP-DECT Server System Settings ..................................................................................................28
Base Station Individual Settings.................................................................................................................29
Base Station Synchronization Status.........................................................................................................29
Troubleshooting
Troubleshooting - Deployment.......................................................................................................31
Troubleshooting - Synchronization ..............................................................................................31

Synchronization and Deployment Guide
Chapter 1: Introduction
This guide is intended for qualified technicians who are looking to will deploy Spectralink
DECT/IP-DECT Server Solutions.Toqualifyto deploy a DECT/IP-DECT Server Solution, you
must have understoodandcompleted the technical training successfully. This guide covers both
1G8 and 1G9deployment.
Scope
This Synchronization and Deployment Guide provides instructions and best practices
for deployment of the following solutions:
•
•
Spectralink DECT/IP-DECT Server 8000 and 2500
Spectralink DECT/IP-DECT Server 6500 and 400
The purpose of this guide is to familiarize you with the procedures that are needed to carry out a
site survey as well as understand the requirements to ensure synchronization is successfully
implemented. At the completion of this guide you should be comfortable with the following:
•
•
•
Using a handset to measure and record Q - and RSSI values (RF values) Selecting a
proper mounting location for base stations and repeaters
Making sure that the company LAN meets the LAN Synchronization requirement limits, and
documenting the deployment.
About Synchronization
In a multi-cell DECT system the base station radios must be synchronized to each other in order
to achieve the optimum handover experience, when handsets are moving around among base
stations. Spectralink supports synchronization of digital base stations via the wire and IP base
stations via the radio. Further, IP base stations can use corporate LAN for synchronization as
well.
Types of Synchronization
•
•
•
LAN Based Radio Synchronization (Server 400/6500/2500/8000)
Air/Radio Based Synchronization (Server 400/6500/2500/8000)
Digital Base Stations (Server 2500/8000)
—Synchronization of digital base stations is controlled by the server and requires no
configuration. Therefore, configuration of digital base stations will not be described
further.
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Before You Begin
This guide assumes the following:
•
•
You have a working knowledge of deployment in general
You have completed the technical training
Related Documentation
For information about Spectralink DECT/IP-DECT Server Solutions not covered by this manual,
refer to the following documentation.
Table 1
Terminology and Acronyms
Table 2 refers to common terms and acronyms that are related to the Spectralink DECT/IP-DECT
solutions that are found through this document.
Table 2
Terminology andAcronyms
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Term
Definition
Deployment
The act of locating the mounting location and installing
base stations and repeaters
Handover
A process initiated by the handset in which the speechchannel
carrying an active conversation is passed from one base station
to another.
Erlang
The erlang is a dimensionless unit that is used in telephony as
a measure of offered load or carried load on service-providing
elements such as telephone circuits or telephone switching
equipment.
LED
Light Emitting Diode
Ni-MH
Nickel -Metal Hydride
Q Value
Signal Quality Factor value. An expression of the bit failure rate
in the communication between the handset and a base station.
The value has a max. of 64, equal to no bit errors measured.
Subject
Documentation
Spectralink Handsets
User Guides on http://spectralink.com
Spectralink DECT/IP-DECT Servers
User Guides on http://spectralink.com
Spectralink Technical News
Newsletter that describes software
changes, bug fixes, outstanding issues,
and hardware compatibility
considerations for new software
releases. To subscribe, go to
www.spectralink.com

Synchronization and Deployment Guide
Table 2
Terminology andAcronyms
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Term
Definition
LAN
synchronization
Method for synchronizing IP base stations over LAN
Synchronization
Over the Air
(OTA)
Method for synchronizing IP base stations over Air
(radio)
RF
Radio Frequency
RSSI Value
Radio Signal Strength Indication value.Arelative expression for
the signal strength of a base station as measured by the
handset at a given location.
Site survey
A site survey comprises the act of locating the mounting
location and noting the cabling requirements for all base
stations and repeaters.
Speech channel
A speech channel is used to carry communication between the
handset and the base station or repeater.

Synchronization and Deployment Guide
Chapter 2: Off-site planning, prior to visit
Below you will find at list of questions and considerations to take into account during the planning
phase prior to visiting a site.
If the customer wants to replace existing DECT/IP-DECT
system:
Is it an IP base station or a digital base station?
•
IP base station:
—
—
—
consider PoE, Active equipment, Switch PoE.
Is this reusable for the new system?
Do LAN switches support LAN synchronization?
•
Digital base station:
—Can the cabling be reused? (yes/no/partly)
Investigate:
»
»
»
»
Is all cabling twisted pair end to end (recommended equal to CAT5e)?
Is cabling present where DECT coverage is needed?
Are all junction points of good quality?
From these investigations the costs to get cabling up to a satisfactory
standard can be estimated.
Note
Today new systems can be a combination of wired and IP.
Investigate site
•
What is the site?
—Are there more buildings?
» If there are more buildings -consider the distance between the buildings, and whether
it is possible to establish synchronization between base stations.
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— Are there more sites (sub-sites)?
» If there are several sites - the remote site(s) (i.e. those where it will not be
possible to establish synchronization) must be DECT/IP DECT system(s)
Study blueprints of building
— Consider the building materials
•
»
»
»
More dense materials means less radio propagation and therefore more base stations
Environment
Moving interior (warehouse, production facility). Much equipment moving around will
influence the propagation
Metal can cause reflections which will influence propagation (i.e. metal blinds, metal
beams, metal shelves, rebars, shielding foils)
Where are fire doors/walls placed? These will influence propagation
»
»
•
System usage
— Where are people placed? (those that will use the DECT/IP-DECT system)?
— Are there areas with (extra) high voice-traffic load like:
»
»
»
Canteen
Nurse office
Etc.
•
Rough estimation of equipment (if possible)
Arough/budgetaryestimateof equipment/basestationscanbecalculated according tobelow:
—
—
Open area (indoor)
Office area
»
DECT systems: [Size of area to cover in m2]/800 = number of digital base stations
Necessity: approximately 25 m between the base stations and 15 m overlap to
enable handover.
IP-DECT systems (Synchronization Over The Air): [Size of area to cover in m2]/600 =
number of LAN base stations Necessity: approximately 22 m between the base
stations and overlap from base station to base station.
IP-DECTsystem (LAN synchronization): [Size of area tocover inm2]/800 = numberof
LAN base stations Necessity: approximately 25 m between the base stations and 15
m overlap to enable handover.
»
»
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Note
Be aware that this will not be an exact figure. A deployment of the site will be necessary to get
a correct number.
“Conclusion”
Based on the above analysis the installer must be able to determine whether to install a
Spectralink DECT server or Spectralink IP-DECT server or a combination.
•
•
•
DECT/IP-DECT systems with IP base stations can benefit from synchronization over LAN
Digital base stations have 4/8 channels whereas IP base stations have 11 channels
Digital base stations, and IP base stations with LAN synchronization can have longer
distance between base stations as opposed to IP base stations with synchronization Over
The Air (OTA).
Synchronization is essential for handing over calls from one base station to another.
Note
Before going on a site, remember to have confirmation from the customer regarding
accessibility to all areas where the customer needs DECT/IP-DECT to make measurements
for deployments.
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Synchronization Over The Air
LAN Synchronization and Digital Base Stations