ADTRAN HTU-R, HTU-C M quick start Hdsl Deployment Guidelines

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ADTRAN PRACTICES

5th Gen HTU-C/HTU-R Quick Start guide

HDSL DEPLOYMENT GUIDELINES

The ADTRAN HDSL system is designed to provide DS1 based services over loops designed to comply with Carrier Service Area (CSA) guidelines. CSA deployment guidelines are given below.

1.All loops are non-loaded only.

2.For loops with 26-AWG cable, the maximum loop length including bridged tap lengths is 9kft.

3.For loops with 24-AWG cable, the maximum loop length including bridged tap lengths is 12kft.

4.Any single bridged tap is limited to 2kft.

5.Total bridged tap length is limited to 2.5kft.

6.The total lenght of multi-gauge cable containing

26-AWG cable must not exceed:

12 -{(3*L26)/9} - LBTAP (in kft)

L26 = Total length of 26-AWG cable excluding bridged taps (in kft)

LBTAP = Total length of all bridged taps (in kft) This deployment criteria is summarized in the chart shown.

Recommended maximum local loop loss information for PIC cable at 70°F, 135Ω, resistive termination is listed in the provided table.

An approximation for maximum amount of wideband nosie on a DSL local loop as measured by a 50kbps filter is < 31dBrn.

An approximation for maximum amount of impulse noise onaDSLlocalloopasmeasuredbya50kbpsfilteris<50dBrn.

These approximations are to be used as guidelines only and may vary slightly on different loops. Adhering to the guidelines should produce performance in excess of 10-7BER.

 

12

 

 

 

 

 

 

 

 

 

(KFT)

11

 

INVALID HDSL CABLE LENGTHS

 

 

 

 

 

 

10

 

 

 

 

 

 

 

 

 

CABLE

 

 

 

 

 

 

 

 

 

9

 

 

 

 

TOTAL

 

 

 

 

 

 

 

 

BRIDGED

 

 

COARSER)

 

 

 

 

 

 

 

 

 

 

2.5

 

 

 

 

 

 

 

TAP

 

 

8

 

 

 

2.0

 

 

 

 

 

 

1.5

 

LENGTH

 

 

 

 

 

 

 

 

 

 

 

 

 

 

1.0

0.5

(KFT)

 

 

 

 

 

 

 

 

 

 

7

 

 

 

 

 

 

0.0

 

 

(OR

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

GAUGE

6

 

 

 

 

 

 

 

 

 

5

 

 

 

 

 

 

 

 

 

OF 24

 

 

 

 

 

 

 

 

 

4

 

 

 

 

 

 

 

 

 

LENGTH

 

 

 

 

 

 

 

 

 

3

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

WORKING

2

 

 

 

 

 

 

 

 

 

 

VALID HDSL CABLE LENGTHS

 

 

 

 

1

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

0

 

 

 

 

 

 

 

 

 

 

0

1

2

3

4

5

6

7

8

9

WORKING LENGTH OF 26 GAUGE CABLE (KFT)

When deployment requires the use of two HREs, the HTU-C M can be deployed with two Low Voltage T400 HREs (1244.041L2) and one Low Voltage HTU-R (1245.021L1 or 1245.026L1).

Loop Insertion Loss

Frequency (Hz)

Maximum Loss (dB)

3000

12.0

10,000

15.0

50,000

25.5

100,000

30.0

150,000

32.75

200,000

35.25

ADTRAN Technical Support (800) 726-8663

Standard support hours, Monday-Friday, 7am-7pm CST

Emergency Support 7 days/week, 24 hours/day

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Section 61245001L2-13, Issue 1

61245.001L2-13A

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Contents SW1 PracticesHTU-C M Hdsl Deployment Guidelines

HTU-C M, HTU-R specifications

ADTRAN HTU-C M and HTU-R are components integral to the digital subscriber line (DSL) technology that facilitates high-speed internet access over copper telephone lines. These devices are commonly used in deploying VDSL2 and ADSL2+ services, providing a reliable solution for connecting residential and business customers to broadband networks.

The HTU-C M, or High-Level Transceiver Unit - Central, serves as the DSL modem located at the service provider’s end. Its primary function is to convert the digital signals from the central office into formats compatible with the existing copper infrastructure. The unit supports various DSL protocols, including VDSL2 and ADSL2+, ensuring compatibility with a wide array of network configurations.

One of its standout features is its advanced spectral management capabilities. The HTU-C M employs sophisticated techniques to optimize signal transmission over different frequency bands, enhancing performance while mitigating interference. Additionally, it is equipped with power management options, allowing it to adjust its power consumption based on the network demand, which contributes to overall operational efficiency.

On the other hand, the HTU-R, or High-Level Transceiver Unit - Remote, operates at the customer premises and is responsible for the reception of data coming from the HTU-C M. This device converts the digital signals back into a format usable by end-user devices, such as routers and computers.

The HTU-R offers robust features, including support for multiple user data interfaces, making it versatile for various home or business setups. Its versatility extends to compatibility with several DSL standards, ensuring support for future upgrades and technologies.

Both units are designed with a focus on reliability and performance. They incorporate error correction technologies, such as Reed-Solomon coding, which helps maintain a stable connection by correcting transmission errors. This characteristic is particularly valuable in areas where the copper infrastructure may be subject to interference, ensuring consistent data rates and reduced latency.

In summary, the ADTRAN HTU-C M and HTU-R are pivotal elements in the delivery of high-speed DSL services. Their advanced features and technologies, such as spectral management and error correction, make them reliable choices for service providers looking to enhance their broadband offerings while ensuring customer satisfaction. With their versatility and robust performance, they play a crucial role in the ever-evolving landscape of digital communication.