HDSL Compatible Unbundled Loop 4 Wire

Overview

Description

The Hi-Bit Rate Digital Subscriber Line (HDSL) Unbundled Loop 4-Wire is a loop facility extending from the Central Office Distribution Frame (MDF) to the End User Customer Premises Network Interface Device that is compatible with HDSL technology. At this time, HDSL Compatible 4 Wire Loops are provided using only 4-wire (2 pairs) copper facilities that meet certain design criteria. For example, qualified loops must be within the maximum loop length established and meet other HDSL requirements. This unbundled network element is provisioned from the end user's address to either a physical collocation node in the central office or to a virtual collocation arrangement in the serving central office. HDSL Compatible Loops are not supported on Enhanced Extended Loop (EEL) backbone facilities.

Availability

HDSL 4 wire is available throughout the Verizon Footprint.

Pricing

Permanent rates for the HDSL Compatible Unbundled Loop are currently pending. Interim rates will be used until final rates are commission approved. Interim rates to be billed follow the product descriptions provided here.

A non-recurring charge per HDSL loop will be billed as well as a non-recurring charge for the service order, service connection - other charges (Verizon-North), installation dispatches (if applicable), and manual intervention surcharges and expedite charges (if applicable). A recurring charge will apply monthly to the HDSL loop. Billing structures and CSR information will mirror other unbundled loops currently in place today. A collocation cross-connect charge will apply.

Loop qualification non-recurring charges will apply as well as a flat rated non-recurring conditioning charges (if requested and if applicable).

Charges are also under development for Spectrum Management inventories that will be developed and maintained as advanced services are deployed.

Pricing and applicable USOCs may vary by state jurisdiction and pursuant to individual carrier interconnection agreements. See your federal and state tariffs for detailed information.

Detailed Information

The unbundled 4-Wire HDSL Compatible Loop provides the service provider with an effective 4-wire channel suitable for the transport of 1.568 Mbps digital signals simultaneously in both directions. The loops are suitable for the transport of 2B1Q signals.

The unbundled 4-Wire HDSL Compatible Loop provides transport for two bi-directional full duplex 784 Kbps digital signals each of which supports a 768 Kbps payload plus framing (8 Kbps) and overhead (8 Kbps). This is sometimes referred to as dual duplex or two full pair full duplex operation. The data rate achieved on a particular 4-wire loop depends upon the performance of the service provider-provided modems and the electrical characteristics (length, bridged tap, noise, etc.) associated with the loop.

The service provider's central office distribution frame (CODF) and end user point of termination (EU-POT) interfaces for the HDSL loop are 4-Wire. If a single circuit network interface device is provided at the EU-POT, an RJ48S or RJ48X connector will be used.

HDSL Loop Limitations

The cable shall be non-loaded.
The total of all bridged tap length shall not exceed 2.5 kft.
The total length of a cable consisting entirely of 26 gauge plus the total bridged tap length shall not exceed 9 kft.
The total length of a cable consisting entirely of 19, 22, or 24 gauge cable or a mixed gauge cable plus the total bridged tap length shall not exceed 12 kft.
HDSL is not included in Wholesale Advantage/EEL offerings.
HDSL Compatible Loops cannot currently be provisioned over loop facilities where DLC/Remote Terminals are connected to customer premises.

For further information, please review the Unbundled Digital Loop Technical Specifications document.

DSL Premise Service is a Wholesale Markets product offer that allows a DLEC to contract with Verizon Network Services for an additional level of support for DSL service delivery at the end user customer premise. DSL Premise Service allows a DLEC to order the dispatch of Verizon technicians to install CPE at the end user customer premise. Work preformed may include some or all of the following: Installation of microfilters, splitter, inside wire and jack, and external modems.

Beginning February 20, 2002, the IOSCs submitted in the SAN field of Line Share LSRs for the DSL Premise Service will change. For LSRs submitted prior to February 20, 2002, DLECs should have used the IOSCs 80600 and 87053. After February 20, 2002, DLECs should substitute IOSC 67585 for IOSC 80600 and IOSC 67586 for IOSC 87053. All other rules will apply as prior to the February 20 date.