Refer to the Scenario: IT-FAC.
With their new IP Office™, you decide to propose twinning to the mobile users. To twin external calls from the IP Office to these mobile users, on-premise or off-premise, requires two trunks; incoming and outgoing. To support 10 simultaneous calls requires 20 trunks.
In addition to the number of trunks required to extend calls, what other design issue must be considered?
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