Innovaphone ComConsult - Location Concept; Figure 10: Configuration of a Replicator on a Slave PBX

Product analysis: innovaphone VoIP products 2010
Copyright © 2010 by ComConsult Technologie Information GmbHPage 10
Connecting and managing a multitude of dif-
ferent branch offices is a real challenge for
TC infrastructure. In this regard, many ques-
tions arise concerning central or local admi-
nistration, open and closed numbering plans
as well as cost savings through Least Cost
Routing (LCR) and end devices which dial
into the company via VPN.
Central administration through
replication
The basis of the innovaphone system’s loca-
tion concept is a master-slave relationship
between various telephone systems. One tele-
phone system is defined as the master and all
others as slaves. An advantage of this master-
slave relationship is the realisation of central
administration, whereby all user data is replica-
ted onto the appropriate telephone system via
LDAP protocol. This so-called “Replicator” is
configured on each receiver, i.e. slave, stand-
by or DECT system. This replication provides
an additional back up component for the sla-
ves, so that in case of failure the master PBX
can take over the malfunctioning slave’s tasks.
Floating licenses ensure license provisioning.
As the master manages all the user data in-
cluding the respective location, users have the
possibility of changing locations while kee-
ping their personal extension number. During
this process, the local PBX simply forwards
incoming calls for the subscriber to the mas-
ter. The master identifies whether the call can
be taken locally or needs to be for-warded to
another PBX.
Numbering plan
Concerning the numbering plan you have the
choice between an open or a closed concept.
This allows either the whole company to be
equipped with a collective numbering plan or
each location to have its own specific, yet com-
plete numbering plan. If the decision is made
in favour of a closed numbering plan, prefixes
ensure that every subscriber is available, but
also that extension numbers can be assigned
more than once in different locations.
Least Cost Routing (LCR)
Using internal codes or prefixes also enables
manual Least Cost Routing (LCR). This means
it is possible to use the appropriate prefix to
directly select one of the company‘s various
trunk lines. The subscriber simply has to dial
the desired location’s prefix, the number for
the outside line and the desired telephone
number. The call is then processed through
the remote trunk line.
Location concept
Figure 10: Configuration of a replicator on a slave PBX