Unified CM
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Visible network failure
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Disrupts new
calls while the phones route to the backup subscriber. Processes the calls when
the routing completes.
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In-progress
calls remain active, with no supplementary services such as conference or
transfer.
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After the
network of the primary subscriber becomes active, the phones align to the
primary subscriber.
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Call manager service in Unified CM primary subscriber failure
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Disrupts new calls while the phones route to the backup
subscriber. Processes the calls when the routing completes.
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In-progress calls remain active, with no supplementary services
such as conference or transfer.
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After the call
manager service in the Unified CM primary subscriber recovers, all idle phones
route back to the primary subscriber.
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Unified CM CTI Manager service on primary subscriber failure
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Disrupts new calls while the phones route to the backup
subscriber. Processes the calls when the routing completes.
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In-progress calls remain active, with no supplementary services
such as conference or transfer.
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After the
Unified CM CTI Manager service on primary subscriber recovers, peripheral
gateway side B remains active and uses the CTI Manager service on the Unified
CM backup subscriber. The peripheral gateway does not switch over.
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Gateway
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Primary gateway is unreachable
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New calls redirect to the backup gateway.
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In-progress calls become inactive.
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After the primary gateway restores, calls (active and new) route
back to the primary gateway.
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MRCP ASR/TTS
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Primary server is not accessible
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New calls redirect to the backup ASR/TTS server
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In-progress calls remain active and redirect to the backup
ASR/TTS server.
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After the primary server restores, calls (active and new) route
back to the primary ASR/TTS server.
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Blade
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Blade failover
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Disrupts new calls while backup server components become
active.
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In-progress calls become inactive.
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After backup server components restores, calls (active and new)
route back to the primary server.
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WAN Link
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Unified CM calls survivability during WAN link failure.
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The new calls redirects to the Survivable Remote Site Telephony
(SRST).
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The in-progress calls redirects to the Survivable Remote Site
Telephony (SRST).
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After the WAN Link restores, the calls redirects to the
Unified
Communications Manager.
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Unified CVP calls survivability during WAN link failure.
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A combination of services from a TCL script (survivability.tcl)
and SRST functions handles survivability new calls.
The TCL script
redirects the new calls to a configurable destination.
Note
| The
destination choices for the TCL script are configured as parameters in the
Cisco IOS Gateway configuration.
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The new calls can also be redirected to the alternative
destinations, including the SRST, *8 TNT, or hookflash. For transfers to the
SRST call agent, the most common target is an SRST alias or a Basic ACD hunt
group.
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A combination of services from a TCL script (survivability.tcl)
and SRST functions handles survivability in-progress calls.
The TCL script
redirects the new calls to a configurable destination.
Note
| The
destination choices for the TCL script are configured as parameters in the
Cisco IOS Gateway configuration.
|
The in-progress calls can also be redirected to the alternative
destinations, including the SRST, *8 TNT, or hookflash. For transfers to the
SRST call agent, the most common target is an SRST alias or a Basic ACD hunt
group.
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After the WAN Link restores, the calls redirects to the Unified
CVP.
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