Applications, Installation | ADTRAN AHDSL2 specs

SPAN CURRENT

TIP (+)

HDSL2

SPAN POWER

−190V

RING (−)

Figure 2. H2TU-C Span Powering Diagram

2. APPLICATIONS

The ADTRAN HDSL2 system provides a cost-effective alternative for deploying T1 service over metallic cable pairs. In contrast with traditional T1 service equipment, ADTRAN HDSL2 can be successfully deployed over one unconditioned, nonloaded, bridged-tapped copper pair CSA loop (see Deployment Guidelines, Section 4).

Litespan HDSL2 deployment is typically made from a Litespan 2000, Litespan 2012, or Litespan ONU channel bank assembly. Figure 3 shows possible ADTRAN HDSL2 deployments from a Litespan channel bank assembly. ADTRAN HDSL2 systems can be deployed quickly without the use of expensive T1 repeater equipment on standard CSA loops while using the existing massive copper-fed twisted line pairs in use by the industry.

ADTRAN uses negative ground-referenced span powering voltage (–190 VDC) on HDSL2 loop. H2TU-R span powering can be disabled to allow locally powered H2TU-R applications, if desired.

Litespan 2000 or 2012 System with Litespan H2TU-C deployment
Common
Control
Channel Bank	HDSL2 Loop Pair		HDSL2 Unit
Assembly with			HDSL2 Unit
Assembly with			Remote End
a Litespan			Remote End
a Litespan
H2TU-C
Installed
Typical Starspan System
HDT
Common
Control	OLNK		HDSL2 Loop Pair
	OLNK		HDSL2 Loop Pair
		ONU-96 with		HDSL2 Unit
		an installed		HDSL2 Unit
		an installed		Remote End
High-Density		Litespan H2TU-C		Remote End
High-Density		Litespan H2TU-C
Fiber Bank

Figure 3. Deployment from a Litespan Channel Bank

3. INSTALLATION

C A U T I O N !

SUBJECT TO ELECTROSTATIC DAMAGE

OR DECREASE IN RELIABILITY.

HANDLING PRECAUTIONS REQUIRED.

After unpacking the unit, inspect it for damage. If damage is noted, file a claim with the carrier, then contact ADTRAN. Refer to Warranty and Customer Service.

The Litespan H2TU-C plugs directly into a Litespan channel bank assembly channel unit slot. Litespan system software must be version 11.0.0 or higher. The tip and ring connections from the H2TU-C to the shelf are made through the following card edge pins:

•Narrowband Tip – Pin A3

•Narrowband Ring – Pin A4

CAUTION

Do not deploy the Litespan H2TU-C into any Litespan channel bank assembly slot that has ADSL Power Distribution Fuse and Alarm (PDFA) connections to the wideband pairs of the channel bank assembly.

This unit supports narrowband cabling only on the Litespan RT shelf. For more information regarding cabling, reference Alcatel document Mechanical Unit Descriptions, OSP 363-405-270.

Upon insertion of an H2TU-C into an unprovisioned slot, the STAT LED should turn red immediately. The STAT LED will remain red until the Litespan bank recognizes the insertion of the card and downloads the AHDSL2 channel unit type code into the line card. Typically, the STAT LED will remain red for approximately 15 to 20 seconds (time may vary). Approximately 3 to 4 seconds after the STAT LED turns off, the HLOS LED will turn red and remain so until the H2TU-C and H2TU-R units synchronize with each other over the HDSL2 loop. The STAT LED will turn green after synchronization of the HDSL2 loop.

61221002L2-5B

AHDSL2 specifications

ADTRAN AHDSL2 is a sophisticated technology designed to enhance broadband connectivity, primarily focusing on delivering high-speed internet access through existing copper telephone lines. This solution is integral in supporting various applications, including voice, video, and data transmission, making it a versatile choice for service providers looking to upgrade their networks.

One of the key features of ADTRAN AHDSL2 is its ability to support asymmetric digital subscriber line (ADSL) technology, which allows for faster download speeds compared to upload speeds. This asymmetry is particularly beneficial for typical internet usage patterns where users often download more data than they upload. AHDSL2 can provide download speeds of up to 24 Mbps and upload speeds around 1 to 3 Mbps, depending on the line conditions and distance from the central office.

ADTRAN's AHDSL2 technology incorporates advanced capabilities such as auto-negotiation and improved line diagnostics. These features enable service providers to automatically adjust the settings for optimal performance based on the quality of the copper line. Furthermore, the built-in diagnostics tools help in the identification and troubleshooting of potential issues, reducing time and resources spent on maintenance and support.

The technology also supports the ITU G.992.3 and G.992.5 standards, which enhance the reach and efficiency of DSL services. It offers better performance in high-noise environments and allows for longer distances between the end-user and the central office, thus expanding the coverage area for broadband services.

Another significant aspect of ADTRAN AHDSL2 is its ability to operate over a range of frequencies, which minimizes interference from other services. By using frequency division multiplexing, the technology ensures that voice and data can be transmitted simultaneously without degradation of service quality.

ADTRAN AHDSL2 is also designed with scalability in mind, making it suitable for various deployment scenarios, whether in residential or commercial settings. Service providers can easily integrate this technology into their existing networks, ensuring a seamless upgrade path as customer demands for bandwidth continue to rise.

Overall, ADTRAN AHDSL2 stands out as a reliable and efficient solution for enhancing broadband services over copper infrastructure, with features that cater to both service provider needs and end-user demands for high-speed internet access. Its combination of advanced technology and easy integration makes it a compelling choice for operators looking to improve their service offerings.