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

Basic Service Features

This functionality allows CLECs who are purchasing Unbundled Network Elements (UNEs) from BST to route calls between BST end offices or between a CLEC switch and BST's end office(s).

Basic Service Capabilities

Additionally, this service allows BST to provide an intermediary switching functionality, whereby CLECs can route calls from their networks to the networks of other CLECs, IXCs, ICOs, etc. This is referred to as intermediary transit switching. Calls that originate from a BST end office within a tandem serving area will either be directly routed between end offices or come to the tandem in order to be routed to a terminating location within that same serving area. If the call is brought to the tandem it could be transported to another tandem serving area, or to another network provider (i.e., CLEC, IXC, CMRS, ICO, etc.). A call coming to a tandem from a CLEC switch will be terminated within that tandem's serving area either to a BST end office or to another network provider.

The tandem trunk port is a shared-use facility that provides the CLEC with the capability of terminating trunks into a tandem for the purpose of sending traffic to, and delivering traffic from, other locations outside of the dial-tone providing switch.

Physical Network Configuration

Switching Requirements

Tandem Switching Functionality (UTS-SF) - Basic Switching and Billing functions will be provided. Generic upgrades will be performed as deemed necessary by BST.

Requests for features that require software and/or hardware not installed or functional within the switch will be priced out upon receipt of a BFR.

	1ESS		5ESS		DMS 100 / 200	4ESS
Generic	1AE11	1AE12	5E9	5E10	NA004
Trunk Port
2 Wire
4 Wire

Signaling

SS7 or Multi-frequency (MF) will be provided.

Recording

• Line side local/toll 100% measured service recording
• All other applicable industry AMA standards will be recorded by BST

Transport / Interconnection

Calls originating from tandem trunk ports will be transported via the BellSouth Public Switched Network (BPSN) or via trunk connections provided by other network providers interconnecting with the BellSouth Access Tandem.

CLECs will have the option of interconnecting at either the Access Tandem or Local Tandem. In areas where multiple local tandems exist, CLECs may elect to connect to one or more tandems as traffic dictates.

CLECs must interconnect to one access tandem in a local calling area for connection to Interexchange Carriers.

If a CLEC insists on a single interconnection point within a LATA, the connection point would be at an access tandem and connectivity to cross-boundary switches will not be possible.

Figure 1. Depicts Network Elements Unbundled Tandem Switching.