Product analysis: innovaphone VoIP products 2010
Copyright © 2010 by ComConsult Technologie Information GmbH
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Reliability is provided on several different le-
vels. On the hardware level, the autarkic hard-
ware, without any moving parts such as hard
disks and fans, ensures a robust plat-form for
the innovaphone own real time op-erating sys-
tem. Furthermore, the redundancy concepts
described in the following paragraphs are ap-
plied.
Active/passive configuration
All innovaphone telephone systems can be
configured as standby systems. Such a pas-
sive standby system registers itself on the ac-
tive system and replicates the database using
the LDAP protocol. The passive system does
not however accept any registrations from
other objects. Should the active telephone
system no longer be available and the re-
gistration fails, a failover is automatically ini-
tiated and the standby system takes over all
the tasks including registrations (see Figure
11). In the laboratory, the devices configured
with default settings recognised the failure on
average within one minute and were registe-
red to the standby system at the latest after a
further two minutes. Once the master is back
in operation, it takes about one minute until
the devices have re-registered and are opera-
ting again.
This failover cluster does not use a virtual
IP address (VIP), so that accordingly, two IP
addresses need to be configured in the cli-
ents. Not all SIP terminals are capable of this:
For example, only one call server could be
configured for the Siemens optiPoint 420 ad-
vance S. Consequently, this device was not
able to register to the standby telephone sys-
tem in the laboratory. This was also the case
for Cisco’s 7960 IP phones. This function is
supported by innovaphone terminals.
Redundancy concept
Figure 11: Master/standby configuration
