Survivability; Enterprise Manager Survivability; Call Manager Survivability - Toshiba IP EDGE Description

Features

Survivability

Survivability
Survivability is based on the capability of the IPT to send Register messages to two
IPedge servers. This makes it possible to provide telephone service in the event that an
IPedge server or the link to that server goes down.
The IPT can register to the backup survivability server (Secondary Server) automatically
when sever goes down or the linkage between server and IPT is disconnected. Survivabil-
ity is provided by the following.
• IPT speech path Survivability — If the user is on a peer-to-peer call when the failure occurs the
fail-over will occur after the call is finished.
• Fail-over — The IPT can fail-over to the Secondary server by sending a Register message to
the Secondary server.
• Fail-back — When the primary server becomes operational, the IPT phones will automatically
re-register to the primary) when each IPT has no active call and is not in use by the station user.
• Telephony Service Survivability — The IPedge system is survivability-aware and will
automatically selects the appropriate destination server according to IPT Fail-over or Fail back
status without complex system data programming or user setting.

Enterprise Manager Survivability

Enterprise Manager Survivability allows an Enterprise Manager member server to take the
place of the primary server should the primary server go off-line.
Only IPedge EC and EM systems can be primary servers. The server configured to be the
redundant or fail-over primary server must also be an EC or EM server. For more details
on Enterprise Manager Survivability, refer to the Survivability Feature Description.

Call Manager Survivability

The survivability feature enables Call Manager to connect to a member server when the
primary server is down.
Both VoIP Option/SoftIPT and IPT relies on its connections to the Call Processing module
to determine whether or not to switch over, and Call Manager relies on the connection to
Net Server to determine whether or not to switch over.
Note If a component failure such as Net Server module or Call Processing module shutdown
takes place instead of the complete server failure, Call Manager and the phone may connect
to different IPedge systems. In that case, the user can manually override the survivability to
reconnect to the same IPedge system.
Call Manager survivability is supported for the IPedge built-in Net Server. ACD or Unifier
based Net Server is not supported.
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