ADSL Compatible Unbundled Loop 2 Wire

Overview

The Asymmetrical Digital Subscriber Line (ADSL) Compatible Loop 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 ADSL technology allowing concurrent transmission of high speed data communications and POTS.

Description

The Asymmetrical Digital Subscriber Line (ADSL) Compatible Loop 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 ADSL technology allowing concurrent transmission of high speed data communications and POTS. At this time, ADSL can only be supported on copper facilities that meet certain design criteria. For example, the facilities must be within the maximum loop length(s) established, and they must meet other ADSL requirements such as limited bridge taps and no T-carrier interfaces.

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.

Availability

This service is available throughout the Verizon footprint. ADSL loops are not supported on Enhanced Extended Loop (EEL) backbone facilities.

Pricing

Permanent rates for the ADSL 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 ADSL 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 ADSL 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 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 ADSL loop provides an effective 2-wire channel that is suitable for the transport of POTS as well as Asymmetrical Digital Subscriber Line (ADSL) signals.

ADSL Loop Limitations:

  • The facility must be copper.
  • The cable shall be non-loaded.

Verizon East:

  • The total length of all bridge taps shall be less than 6 kft.
  • The total length of the cable shall be less than 18 kft.
  • The total length of the cable plus the bridge tap length shall not exceed 18 kft.

Verizon West:

  • The total length of all bridge taps shall be no more than 2.5 kft.
  • The total length of the cable shall be less than 12 kft.
  • The total length of the cable plus the bridge tap length shall not exceed 12 kft.
  • The direct current resistance of the loop shall be 1300 ohms or less.
  • Loaded bridge tap is not permitted.
  • ADSL is not included in UNE Platform/EEL offerings.
  • ADSL Compatible Loops cannot currently be provisioned over loop facilities where DLC/Remote Terminals are connected to customer premises.

NOTE: CLEC equipment placed on the end of the loop could affect performance of the loop if the equipment added is outside of the technical parameters specified.

The 2-Wire ADSL interface at the Central Office Distributing Frame termination is 2-wire and the interface at the EU-POT is 2-wire. If a single circuit network interface jack is provided at the EU-POT, an RJ11C connector will be used. One conductor of the pair is called tip and the other is called ring. This loop is suitable for the transport of Discrete Multi-Tone (DMT) or Carrierless AM/PM (CAP) signals at rates up to 1.5 Mbps downstream (towards the EU-POT) and up to 176 Kbps upstream (from the EU-POT). The data rate achieved on a particular ADSL 2-Wire loop depends upon the performance of the customer-provided modems and upon the electrical characteristics (length, bridge tap, noise, etc.) associated with the loop. As a result of the two technologies supported, Discrete Multi-Tone (DMT) and Carrierless AM/PM (CAP), there will be specific Network Channel Interface (NCI) codes associated with each of the technologies. This information is provided below.

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