Dial-in access numbers are the phone numbers users dial to reach the audio conferencing service. For each access number, a SIP-enabled contact object is created within Active Directory. These objects should not be modified with regular tools and should only be managed using the Lync management tools.
Dial-in access numbers have a region associated that ties them to a particular dial plan. This association is how a dial-in access contact knows which normalization rules to apply when callers enter extensions or attempt to dial out.
The following options are available when creating a dial-in access number:
• Display number—The text format of the number as it is displayed to callers who dial the number from a Lync client. PSTN ...