Is only the value-added service package for voice service required when the AR router is connected to an IP phone through an AT0 trunk

The AR must work in PBX mode when the AR connects to an IP phone and the PSTN through the AT0 interface. After the value-added service package for voice services is configured, you need to request the license. In V200R003 and earlier versions, the CM license needs to be configured. In V200R005 and later versions, UC Express License Package and UC Express IP Quantity need to be configured.

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