CG-STUG-001 Issue 1.28-August 4, 2006

Basic Service Features

Unbundled Dark Fiber (UDF) is unused fiber-optic transmission media. It is offered as a point-to-point arrangement. It is presently offered in three configurations: Local Channel, Interoffice Channel, and Local Loop. These arrangements consists of four optical fibers and fiber terminating equipment as shown in Figure 5. UDF is offered without optical signal regeneration to compensate for signal losses.

BellSouth reserves the right to rearrange its network and to modify the manner in which it provides service in order to meet its overall service requirements. This includes, but is not limited to, the right to engineer and construct its fiber-optic facilities in accordance with its normal operations without the requirement to modify its materials, splicing techniques, or planned facility rearrangements to suit a specific CLEC request.

Basic Service Capabilities And Restrictions

BellSouth makes no representations regarding the transmission capability of the facilities. BellSouth shall make available Dark Fiber Transport where it exists in BellSouth's network and where, as a result of future building or deployment, it becomes available. Dark Fiber Transport will not be deemed available if

1. it is used by BellSouth for maintenance and repair purposes,
2. it is designated for use pursuant to a firm order placed by another customer, or
3. it is restricted for use by all carriers, including BellSouth, because of transmission problems or because it is scheduled for removal due to documented changes to roads and infrastructure, or
4. BellSouth has plans to use the fiber within a two-year planning period.

How Does This Service Work?

UDF can be ordered by a CLEC to utilize BellSouth fiber-optic facilities to complete a service that it is providing for its end-user or to construct its own network.

General Description of Performance Standards and Reliability

• Service Performance Objectives: There will not be any specified performance objectives for UDF. However, at the request of the CLEC, if made prior to the installation of the facilities, BellSouth will attempt to estimate the transmission loss of the channel at the CLEC's intended transmission wavelength. BellSouth does not warrant that the CLEC's channel will operate at that estimated loss or that the transmission loss will remain constant during the period in which the CLEC obtains the facilities from BellSouth.
• Diversity Requirements: Some level of diversity will exist in BST's network (embedded and forward looking).

Deployment Schedule

UDF will be available, where spare fibers exist, in all states.

Installation intervals will be determined on an individual case basis. The targeted Installation is 20 calendar days after receipt of an error free LSR.

A Service Inquiry (SI) will be required for UDF requests in order to determine spare fiber availability and installation interval due to connection requirements.

All CLEC requests for UDF should be sent to the Account Team via an LSR with UNE in the first three characters of the "Project" field and other appropriate information. The LCSC will then issue a Service Order for a CLS circuit to CABS.

1. The LSR and the service inquiry will be submitted by the CLEC to the appropriate Account Team. The account team will forward the service inquiry to the appropriate state Outside Plant & Engineering (OSPE) and Circuit Capacity Management (CCM) organizations.
2. OSPE and CCM will review fiber availability in the requested cross sections. If fiber is not available the SI is returned to the account team who will then forward the response to the CLEC. If fiber is available OSPE and CCM will respond to the Account Team, providing the total fiber length being provided on the request, and the service provision interval.
3. The SI and LSR will then be forwarded to the LCSC. The LCSC will write the Service Order and will apply the appropriate USOC configuration for billing.

Customer Education for the ordering of UDF is available from the CLEC Account Team upon request.