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

Basic Service Features

Channelization, although not an Unbundled Network Element, provides the multiplexing capability option associated with unbundled dedicated transport that will allow a DS1 or DS3 UNE collocation cross-connect to be channelized within a BellSouth central office. This can be accomplished through the use of a multiplex or a digital cross-connect system at the discretion of BellSouth. Once Channelization has been installed, the CLEC can activate channels all at once or on an as-needed basis by connecting lower level UNEs via Central Office Channel Interfaces (COCIs).

Basic Service Capabilities And Restrictions

The initial set of Central Office channelization capabilities will be as follows:

• DS1 Channelization System: An element that channelizes a DS1 signal into 24 DS0s. Each activated DS0 requires a Central Office Channel Interfaces (COCI). Voice Grade or Digital Data or ISDN Central Office Channel Interfaces can be activated on a DS1 Channelization System.

DS3 Channelization System: An element that channelizes a DS3 signal into 28 DS1s. Each activated DS1 requires a Central Office Channel Interface.

• The multiplexer should be ordered with the higher-level transport service. Collocation should already be established. Lower-level transport service to be used with a higher-level channelized service can be ordered to establish higher-level channelized transport service.

How Does This Service Work?

Channelization allows the CLEC to build channelized facilities that can interconnect with lower level UNEs. One example is shown in Figure 2A where it is a part of Local Interconnection facilities. Figure 3 shows Channelization as a part of a facility being used to build a CLEC's network.

General Description of Performance Standards and Reliability

• Service Performance Objectives: None
• Diversity Requirements: None
• Performance Monitoring: None
• Special Considerations: None
• Deployment Schedule: Channelization is offered where defined in the NECA No. 4 tariff. Channelization is only available in select POP and End User Serving Wire Centers.

Other channelization arrangements may be made available if requested via the Bona Fide Request process.

Feature Interaction

COCIs will be billed on the lower level UNE order that is interfacing with the Channelization arrangement and will have to be compatible with those UNEs. For example, a CLEC should not connect a 64 kbps loop to a Voice Grade Center Office Channel Interface.

Service Inquiry & Ordering Guidelines

A CSPS Service Inquiry will be required for service requests associated with Channelization .

All CLEC requests for UC for Local Interconnection should be sent to the LIPC via ASR. The instructions below apply.

All CLEC requests for Channelization should be sent to the LCSC via an LSR with UNE** (where ** is a number representing a particular UNE to collocation arrangement or UNE combination.) The LCSC will then issue a Service Order for a CLF circuit to CABS.