
140 Chapter 8 Configuring telephony resources
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H323 Settings
Figure 40 H323 Settings
Table 34 describes the fields on the H323 Settings tab.
Table 34 H323 Settings fields (Sheet 1 of 4)
Field Value Description
Telephony Settings
Fallback to
circuit-switched
Enabled-All
Enabled-TDM
Disabled
Your choice determines how the system will handle calls if
the IP network cannot be used.
• Enabled-All: All calls are rerouted over specified PSTN
trunks lines.
• Enabled-TDM: All TDM (digital telephones) voice calls
will be rerouted over specified PSTN trunks lines.
• Disabled: Calls will not be rerouted.
Note: Enabled-TDM-only enables fallback for calls originating on digital telephones. This is
useful if your IP telephones are connected remotely, on the public side of the BCM network,
because PSTN fallback is unlikely to result in better quality of service in that scenario.
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