How Calls Are Affected When Switchover Occurs; Requirements For Other System Components - Altigen MAXCS ACC 6.5 Administration Manual

The network of the active system disconnects, and Automatically assume control
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when active system is not available is selected in the Redundancy dialog box of
the standby system (see Figure 2 on page 367).

How Calls Are Affected When Switchover Occurs

When system control switches from the active to the standby system, it affects calls in
the following ways:
A direct connected call is kept (except in the case of shutdown or restart), like
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extension A calls extension B and is connected. All other calls are disconnected (for
example, conference calls; silent monitor, barge in and coaching calls; parked calls,
queued calls, and calls in music-on-hold; APC calls; paging). In voice mail, a
Zoomerang call is kept but you cannot go back to VM.
In those direct connected calls, if one or both sides uses an H.323 channel, it will be
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reset after switching over. MAXCS 6.5 redundancy supports:
Analog Ext/Trk to Analog Ext/Trk
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Analog Ext/Trk to T1/E1/PRI
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Analog Ext/Trk to SIP Ext/Tie/Trunk
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T1/E1/PRI to SIP Ext/Tie/Trunk
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SIP Ext/Tie/Trunk to SIP Ext/Tie/Trunk
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Mobile Ext to Analog Ext/Trk
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Mobile Ext to T1/E1/PRI
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Mobile Ext to SIP Ext/Tie/Trunk
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The connected trunk and extension channel shows "in use" in the standby Softswitch
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until it is disconnected.
CDR is dropped for all calls, including connected calls.
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Recording stops.
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After switching, channels and extensions that were connected still have busy status,
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and a call to these channels or extensions will follow busy call handling rules.
If a SIP channel is involved in a call, and a resource channel in the local gateway is
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allocated, the call will not be kept.
After switchover, disconnection is the only action available to calls that remained
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connected. (Users cannot transfer, conference, park, start recording, and so on.)
If a connected call does not hang up within 30 minutes after switchover happens,
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the call is reset by the standby server. The value of timeout can be changed in the
registry. The path is "HKEY_LOCAL_MACHINE\SOFTWARE\AltiGen Communications,
Inc.\AltiWare", and the key name is "RedundCallConnectTimeout". After changing
the timeout value, you must restart the server to apply the change.

Requirements for Other System Components

This section lists firmware and software requirements.
Chapter 26: Redundancy Configuration
MAXCS ACC 6.5 Administration Manual 365