Voice Routing

Voice routing in Lync Server 2013 is determined by the association of various components such as policies, routes, and trunks. A quick overview of the key pieces is given here:

• Dial Plan—Dial plans are the equivalent of location profiles for those migrating from Office Communications Server. A dial plan contains a set of normalization rules to convert digits entered by a user into a routable format.

• Normalization Rules—Normalization rules are associated with a dial plan and converts the digits a user might dial in to a standard, expected format like E.164.

• Voice Policies—Voice policies determine what voice features users are allowed to use, such as call forwarding, simultaneous ringing, and call transfer. It also defines which PSTN usages can be accessed by a user.

• PSTN Usages—Usages are a class of call that is then associated with voice policies. If a user’s voice policy does not contain a specific PSTN usage, the user is not allowed to place the call.

• Routes—Routes are used in Lync Server to direct calls through a specified trunk or set of trunks.

• Trunks—Routes deliver calls to specified trunks, which can be a media gateway or a direct SIP trunk.

• Trunk Configuration—Each trunk might require unique settings or translation rules, so a trunk configuration defines those parameters per trunk.

• Translation Rules—Translation rules associated with a trunk configuration to manipulate dial strings before being delivered to the trunk. These rules can manipulate the dial string sent across the trunk if the opposite end is not capable of handling E.164 numbers.