Bedienungsanleitung Gigaset Pro N870E IP PRO (Seite 51 von 142) (Englisch)

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Gigaset N870 IP PRO / Admin IE-UK-International en / A31008-XXXXX-XXXX-X-XX / settings_basestations.fm / 8/10/21

Template Module, Version 2.1, 11.08.2020 / Template Basiseinstellungen: Version 3.1 - 07.07.2020

Base stations

DECT-based synchronisation

To relay DECT synchronisation signals from base station A to base station B, base station B must

be able to receive signals from base station A with sufficient signal quality.

A base station can synchronise with each base station on a higher sync level. The sync level

concept allows base stations to automatically select the best suitable base station (having a

lower sync level number) to receive synchronisation signal from. Simultaneously, it guarantees

a strictly limited number of hops along any branch in the synchronisation tree and to prevent

circles between automatically optimised synchronisation chains.

During configuration, assign one level in the synchronisation hierarchy (sync level) to each base

station. Sync level 1 is the highest level; this is the level of the sync master and appears only once

in each cluster. A base station always synchronises itself with a base station that has a better sync

level. If it sees several base stations with a better sync level, it synchronises itself with the base

station that provides the best signal quality. If it does not see any base station with a higher sync

level, it cannot synchronise.

LAN-based synchronisation along the synchronisation path

If the DECT connection between base stations seems to be not reliable enough to permanently

guarantee a stable DECT over the air synchronization, e.g., because they are separated by iron

doors or a firewall, you can determine that synchronisation should take place via LAN. In this

case the base station with the higher sync level will act as LAN master, the base station with the

lower sync level is a LAN slave. One base station must be explicitly be defined as LAN master. This

should not be the device on which the DECT Manager is also located.

Advantages of LAN synchronisation compared with DECT synchronisation:

•Higher flexibility in the arrangement of the base stations as no synchronisation chains need

to be formed.

•Fewer base stations required as the overlapping area of the base stations is smaller. The over-

lapping area for handset handover can be smaller, because neighboured base stations do

not need to receive each other in stable error free quality, but they must still be able to detect

each other for the process of dynamic channel selection.

•Configuration of the system is simplified as all base stations can be synchronised on one

synchronisation master.

Network requirements

•The N870 IP PRO devices must be connected to a switch port of minimum 100 Mbit/s with

corresponding cabling.

•PoE IEEE 802.3af < 3.8 W (Class 1) for an alternatively external power supply.

•The DECT manager and all its base stations must be in the same layer 2 segment (common

broadcast domain).

DECT manager and base stations must be connected to the same Ethernet or virtual

LAN sharing a common broadcast domain.

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