OS/DA. The OS/DA UNE is defined as: (a) any automatic or live assistance to a consumer to arrange for billing or completion, or both, of a telephone call (OS); and (b) a service that allows subscribers to retrieve telephone numbers of other subscribers (DA). In accordance with Rule 51.319(f), GTE will not provide OS/DA as a UNE when it offers customized routing. Where US Dial Tone provides its own OS and DA platform, US Dial Tone is required to route its OS and DA traffic to its platform over customized routing. GTE shall: (a) provide US Dial Tone a list of switches that can provide customized routing using line class codes or similar method (regardless of current capacity limitations) and a schedule for customized routing in the switches with existing capabilities and capacity; (b) provide US Dial Tone with applicable charges, and terms and conditions, for providing customized routing; and (c) choose the method of implementing customized routing of OS and DA calls. When GTE offers customized routing to US Dial Tone, US Dial Tone will be required to establish dedicated transport in order to route OS/DA traffic to the designated platform. If a dedicated transport UNE is used to route OS/DA traffic to the designated platform, US Dial Tone must purchase a trunk side port and establish a collocation arrangement in accordance with the Collocation Article. If the dedicated transport UNE used to route OS/DA traffic to the designated platform is ordered out of the applicable access tariff, no collocation arrangement or trunk side port is required.
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Sources: Interconnection, Resale and Unbundling Agreement, Interconnection, Resale and Unbundling Agreement