GSC11_JOINT_29a1
15 May 2006
SOURCE
TITLE:
ATIS NIPP
Report of Work on Digital Subscribe Line (DSL) and Other
Access Interfaces
AGENDA ITEM:
DOCUMENT FOR:
Joint GTSC/GRSC; 4.4
Decision
Discussion
Information X
1 DECISION/ACTION REQUESTED
2
None. This report summarizes the current activities of ATIS’ Network Interface, Power, and Protection (NIPP) Committee on Digital Subscriber Line (DSL) and highlights work on
VDSL2 (a principal focus this year),
REFERENCES
Work toward New Recommendation:
ITU-T Rec. G.993.2 Very high speed digital subscriber line transceivers 2 (VDSL2)
Re-affirmed/revised standards:
T1.403 Network and Customer Installation Interfaces - DS1 Electrical Interface
T1.403.01 Network and Customer Installation Interfaces - Integrated Services Digital
Network (ISDN) Primary Rate Layer 1 Electrical Interface Specification.
T1.403.02 Network and Customer Installation Interfaces - DS1 Robbed-Bit Signaling
State Definitions
T1.403.02a
T1.404
T1.416
DS1 Robbed-Bit Signaling State Definitions - Supplement to T1.403.02-1999
Network-to-Customer - DS3 Metallic Interface Specification
Synchronous Optical NETwork (SONET) Physical Layer Specification:
Common Criteria
T1.416.01 Synchronous Optical NETwork (SONET) Physical Media Dependent
T1.416.02
T1.416.02a
Specification: Multi-Mode Fiber
Network to Customer Installation Interfaces - Synchronous Optical NETwork (SONET)
Physical Media Dependent Specification: Single Mode Fiber
Synchronous Optical NETwork (SONET) Physical Media Dependent Specification: Single
Mode Fiber - Supplement to T1.416.02-1999
Synchronous Optical NETwork (SONET) Physical Media Dependent Specification: Electrical T1.416.03

HLTF5(95)1
15 May 2006
3 RATIONALE
The ATIS Network Interfaces, Power, and Protection (NIPP) Committee has, as one of its mandates, the development of Digital Subscriber Line (DSL) standards as well as the development of standards enabling the application of DSL technology in the marketplace. In this latter category are efforts to specify guidelines to facilitate a spectral environment in metallic loop cables such that DSL technologies can be deployed without impaired operation due to crosstalk with existing carrier technologies and to develop DSL filter and splitter specifications facilitating the deployment of DSL systems. A major focus this year was work on VDSL2 with continued work on a number of fronts, other variants of xDSL, and Dynamic
Spectrum Management (DSM).
VDSL2:
A principal focus this year was moving VDSL2 to approval in ITU-T SG15. Following our efforts on VDSL, the group decided, to minimize the time it would take to get an approved document, to focus on sending material to SG15 rather than use resources developing our own, separate document. The ITU-T Recommendation was approved in May, 2006. The NIPP contribution to the effort in 2005 was, in part, 38 company contribution and one US position paper. Never a group to remain satisfied, 10 company contributions were offered to SG15 on enhancements to VDSL2 and ADSL/ADSL2+ earlier this year.
There was a request from TIA TR41.9 to address the TIA-968 conformance criteria for the newly approved VDSL2. As we have in the past, the group will work cooperatively to determine if any work needs to be done beyond what is available for VDSL1 and, if so, develop the necessary material.
DSM:
DSM has the potential of being a significant asset as the telecommunications world moves into realm of IPTV. Bandwidth in the access remains a major item and this is especially true for copper-based access loops, i.e., the territory of DSL. DSM will allow network providers to manage bandwidth, i.e., allocate bandwidth for use and recover bandwidth that could otherwise be lost when terminals using that bandwidth are turned off. The term ‘fungible bandwidth’ will become a common one as IPTV continues to be a major focus for delivery of content to the home. An initial draft is currently out for ballot.
DSL Splitters:
Minor work was done to enhance splitters for DSL and the document now covers VDSL2,
VDSL1, and ADSL variants.
Non-DSL Access Interfaces:
A number of standards dealing with analog and other digital access interfaces came up for their five-year review per ANSI requirements. There was no new work to be done regarding those interfaces and they were re-affirmed. See the Reference list above for a list of those standards.
Future Work:
Future work will continue on enhancements of existing DSL standards to meet customer needs, e.g., symmetry of upstream and downstream bit flows, and developing DSM.
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