MAN-22457-001_B00_SSMTT-41V_VTU-R_MMD

8/14/2019 MAN-22457-001_B00_SSMTT-41V_VTU-R_MMD

1/40

1VDSL VTU-R Module

SSMTT-41VConexant VDSL VTU-RModule for the MTT and

xDSL Family of Products

MAN-22457-001 Rev. C00

302 Enzo Drive San Jose, CA 95138

Tel: 1-408-363-8000 Fax: 1-408-363-8313

Users Manual

SA912


2/40

SA9122

Warning

Using the supplied equipment in a manner not specified by

Sunrise Telecom may impair the protection provided by theequipment.

CAUTIONS! Do not remove or insert the module while the test set is on. Inserting or

removing a module with the power on may damage the module. Do not remove or insert the software cartridge while the test set is on.

Otherwise, damage could occur to the cartridge.

End of Life Recycling and Disposal Information

DO NOT dispose of Waste Electrical and Electronic Equipment

(WEEE) as unsorted municipal waste. For proper disposal re-

turn the product to Sunrise Telecom. Please contact our local

ofces or service centers for information on how to arrange thereturn and recycling of any of our products.

EC Directive on Waste Electrical and ElectronicEquipment (WEEE)

The Waste Electrical and Electronic Equipment Directive aims to

minimize the impact of the disposal of electrical and electronic

equipment on the environment. It encourages and sets criteria

for the collection, treatment, recycling, recovery, and disposal

of waste electrical and electronic equipment.

2010 Sunrise Telecom Incorporated. All rights reserved.

Disclaimer: Contents subject to change without notice.


3/40

3VDSL VTU-R Module

SSMTT-41V Module

End of Life Recycling and Disposal Information....................... 2

1 Applications ...................................................... 5

1.1 Testing a VDSL Line ......................................................... 5

2 VDSL VTU-R Module ......................................... 7

2.1 Module Panel .................................................................... 7

2.2 Test Set LEDs ................................................................... 7

3 Menus ................................................................ 93.1 Modem Control ............................................................... 10

3.1.1 Modem Setup .............................................................. 10

3.2 Modem Status ................................................................ 123.2.1 Current Status ............................................................. 123.2.2 Tone Graphic/Table ...................................................... 15

3.2.2.1 Bits Per Tone............................................................. 153.2.2.2 SNR Per Tone ........................................................... 17

3.2.3 Link Measurements ..................................................... 18

3.3 IP Features ..................................................................... 203.3.1 PING Test .................................................................... 21

3.3.2 Echo Response ........................................................... 23

3.4 Measurement Setup ....................................................... 24

3.5 View/Store/Print .............................................................. 263.5.1 Saving a Test ............................................................... 273.5.2 Viewing a Stored Test.................................................. 28

3.5.3 Printing a Stored Test .................................................. 283.5.4 Deleting a Stored Test ................................................. 28

3.5.5 Locking and Unlocking a Stored Test........................... 283.5.6 Renaming a Stored Test .............................................. 28

4 General Information ........................................31

4.1 Customer Service ........................................................... 31

4.2 Testing and Calibration Statement .................................. 33

4.3 Express Limited Warranty ............................................... 34

Index ..................................................................... 37


4/40

SA9124


5/40

5VDSL VTU-R Module

1 Applications

1.1 Testing a VDSL Line

This module offers the simplest method for testing VDSL spans.

Test Set at Customer Premises

Central

Office

VTU-O

VTU-O

VTU-O

VTU-O VDSL

Port

Figure 1 Connecting to the VTU-O

Use the following procedure in the order given:

1. Power on the test set.

2. Connect the test set to the circuit via the modules VDSL port.

Depending on the access point, use an RJ-11 to RJ-11 or

RJ-11 to alligator clips cable.

3. The test set automatically tries to synchronize with the far end

VTU-O. See the top of the screen for status information.

4. While the test set is trying to connect with the VTU-O, it displays

ATTEMPTING TO OPEN LINK at this stage, the xTU-R LED

is blinking red.

5. When the test set recognizes the VTU-Os response, it displays

TRAINING. This indicates that it has made contact with the

VTU-O and is starting the handshake procedure to establish

synchronization (SHOWTIME).

6. If the test set successfully connects with the VTU-O, the

screen automatically displays the CURRENT STATUS screen.

The message now reads LINK UP. The xTU-R LED is green.

Refer to Section 3.2.1for details on this screen.

If unsuccessful, the test set will continue trying to establish

synchronization and the xTU-R LED will remain blinking red.


6/40

SA9126


7/40

7VDSL VTU-R Module

2 VDSL VTU-R Module

2.1 Module Panel

VDSL

Figure 2 Module Connector Panel

The module has one port, it is:

VDSL: This is a 2-wire RJ-11 line interface.

2.2 Test Set LEDs

SSMTT-ACM, -ACM+, -EX SSMTT-B, -C

Figure 3 Test Set LED Panels

The following test set LEDs shown in Figure 3 are used by themodule:

MODULE

Green: Test set is in module mode.

xTU-R

Green: Test set has successfully connected to the VTU-O.

Red: Test set is not connected to the VTU-O.

SIGNAL

Green:Measurement does not exceed any preset values in

the MEASURE SETUP screen.

Red: Measurement exceeds a preset value in the MEASURE

SETUP screen in Section 3.4.

Off: THRESHOLD is set to OFF in the MEASURE SETUP

screen inSection 3.4.


8/40

SA9128


9/40

9VDSL VTU-R Module

3 Menus

Press MODULE to access the VDSL main menu. The menu tree

shown in the following gure outlines functions of this module.

TONE GRAPHIC/TABLE

3.2.2.1

BITS PER TONE

3.2.2.2

SNR PER TONE

VDSL MAIN MENU

3.1

MODEM CONTROL

3.2

MODEM STATUS

3.3

IP FEATURES

3.5

VIEW/STORE/PRINT

3.4

MEASUREMENT SETUP

MODULE

Key

MODEM CONTROL

3.1.1

MODEM SETUP

3.1.2

SYSTEM SETTINGS

MODEM STATUS

3.2.1

CURRENT STATUS3.2.2

TONE GRAPHIC/TABLE

3.2.3

LINK MEASUREMENTS

3.3.1

PING TEST

3.3.2

ECHO RESPONSE

3.3

In IP CONFIGURATION,

press OK (F4) for:

Figure 4 Module Menu Tree


10/40

SA91210

3.1 Modem Control

This menu screen contains the following:

MODEM SETUP

MODEM STATUS IP FEATURES

MEASUREMENT SETUP

PROFILES

VIEW/STORE/PRINT

3.1.1 Modem Setup

>SHOWTIME Plan998SHOWTIME Plan997< CURRENT STATUS

[DOWNSTREAM] [UPSTREAM]

RATE:1504 kbps RATE:384 kbpsMAX :4558 kbps PWR :2.0 dBmCPTY:33 % DELY:1.9 msSNRM:16.0 dB

ATTN:54.0 dBDELY:1.9 ms

CONTINU STORERETRAINOPEN

The left column in the screen

shown on the right displays the

downstream result, indicating

the direction from the DSLAM

to the customer (CPE). The right

column shows the upstream

result from the customer to the

DSLAM.

Figure 6 Current Status Screen

Modem DOWNSTREAM Statistics

RATE: Link up speed of the VDSL connection.

MAX: Maximum downstream rate the VDSL line can support.

CPTY: Line Capacity is a ratio of (achieved line rate/attainable

line rate) x 100. For example, a CPTY reading of 85% means the

modem has the capability to transmit 15% more line rate.

SNRM: Realized Signal-to-Noise Margin is the margin above thesignal-to-noise ratio required to support the bit rate.

ATTN: Attenuation is the difference in dB between the power

received at the near end and that transmitted from the far end.

DELY: Delay in mS. This is the actual delay in milliseconds intro-duced by the interleaver. The delay ranges from 1 to 63 mS. The

interleaver delay is set to meet the network service providers

requirements for error burst protection and latency.

Modem UPSTREAM Statistics

RATE: Upstream link up speed.

PWR: Aggregate Power of the signal from test set to DSLAM.DELY: Delay in mS. This is the actual delay in milliseconds intro-

duced by the interleaver. The delay ranges from 1to 63 mS. The

interleaver delay is set to meet the network service providers

requirements for error burst protection and latency.


13/40

13VDSL VTU-R Module

Note: Because this screen is constantly updating, some of the

values may slip below the requirements at times. The requirements

specify what is needed for link turn-up. The following sub-section,

Interpreting the Results, mentions that 8 dB is a commonly usedtarget noise margin. This applies to initial synchronization only.

Depending on noise conditions, the value can slip without losing

synchronization.

CURRENT STATUS F-keys

CONTINU (F1): Return to the previous screen.

OPEN/CLOSE(F2): Open the link, press again to close.

RETRAIN(F3): Restart the handshake procedure.

STORE (F4): Store results.. Use the procedures described in

.

Interpreting the Results

Fixed Rate Circuits

Fixed rate circuits specify an exact data rate for the customer. If

testing a Fixed Rate service, look at the following:

RATE: This should equal the xed upstream and downstream rate

set for the circuit. For example, if the circuit under test is configured

for 384 downstream/128 upstream, a downstream rate at 384 and

a upstream rate at 128 should be observed.

SNRM: Conrm that the signal-to-noise margin complies with

your companys requirements. A common standard is 8 dB, higher

values can provide more room for any introduced noise.

Rate Adaptive Circuits

Rate adaptive circuits specify minimum and maximum data rates

for a circuit, and try to attain the maximum rate set by the DSLAM.

If testing a Rate Adaptive service, observe the following:

RATE: This should be between the minimum and maximum

thresholds set for the circuit.

SNRM: The Signal-to-Noise margin needs to be above the mini-

mum allowable margin. Commonly it is 8 dB; the observed margin

might be higher. Since rate adaptive circuits try to use all the

possible bandwidth, the noise margin will typically be very close

to 8 dB (or the minimum value).


14/40

SA91214

Turn-up Examples

A service provider offers a fixed rate service at 1504 kbps

downstream/384 kbps upstream. A technician turned up two dif-

ferent circuits. Both met the required bit rate; however, there weresome crucial differences in results.

Example 1

11:50:45>SHOWTIME Plan997< CURRENT STATUS


RATE:1504 kbps RATE:384 kbpsMAX :4558 kbps PWR :2.0 dBmCPTY:33 % DELY:1.9 msSNRM:16.0 dBATTN:54.0 dBDELY:1.9 ms

CONTINU STORERETRAINCLOSE

In a good circuit, RATE matches

the specified fixed rates. A

downstream SNRM of 16 dB

allows handling of additional

interference (impulse noise)

without affecting service. This is

reflected in a low downstream

CPTY of 33%. This means the

customer data uses only1

/3ofthe available bandwidth.

Figure 7 Link Turn-up Results from a Good Circuit

Example 2

11:50:45>SHOWTIME Plan997< CURRENT STATUS


RATE:1504 kbps RATE:384 kbpsMAX :1536 kbps PWR :2.0 dBmCPTY:98 % DELY:1.9 ms

SNRM:6.0 dBATTN:63.0 dBDELY:1.9 ms

CONTINU STORERETRAINCLOSE

In a borderline circuit, RATE

does meet the specified fixed

rates. However, downstream

SNRM is only 6 dB, and down-

stream CPTY is 98%. Any

introduced interferers (impulse

noise) may affect this circuitsperformance and cause a

service disruption.

Figure 8 Link Turn-up Results from a Borderline Circuit


15/40

15VDSL VTU-R Module

3.2.2 Tone Graphic/Table

This menu screen contains the following:

BITS PER TONE

SNR PER TONE

3.2.2.1 Bits Per Tone

Measure the bits per tone distribution used by the modem to

transmit the provisioned rate. View the number of bits assigned

per tone as a graphic or as a table.

The rst screen allows selection of the following MHz ranges:

If Plan 997, use these: If Plan 998, use these:SUMMARY: 0.138M12.0M SUMMARY: 0.138M12.0MDS1: 0.138M3.0M DS1: 0.138M3.75MUSI: 3.0M5.1M USI: 3.75M5.2MDS2: 5.1M7.05M DS2: 5.2M8.5MUS2: 7.05M12.0M US2: 8.5M12.0M

Note:US is upstream, DS is downstream frequencies.

After making a selection, press ENTER to view the BIT GRAPHIC

screen.

During modem initialization, a signal-to-noise measurement for

each tone is made. Bit distribution is then optimized to meet the

desired bit rate.

Each tone can support a theoretical maximum of 15 bits. During

operation, the bit distribution may be adjusted to optimize band-

width. The modem constantly monitors the signal-to-noise ratio

for each tone. If a tone degrades in quality, it sends a bit swap

command to adjust the amount of bits assigned to that particular

tone. These bits may be added to a different tone or taken out

completely.

An example of the SUMMARY: 0.0M12.0M screen is shown.

SHOWTIME Plan998< BITS GRAPHIC pg1/11

TONE 34 (146 kHz): 10 BITS15

0

0 255

>> STORE

11:50:45>SHOWTIME Plan998< BITS TABLE

# BITS # BITS # BITS # BITS0 0 8 0 16 0 24 01 0 9 0 17 0 25 02 0 10 0 18 0 26 03 0 11 0 19 0 27 04 0 12 0 20 0 28 05 0 13 0 21 0 29 06 0 14 0 22 0 30 07 0 15 0 23 0 31 0

STORE GRAPHICPAGE-UP PAGE-DN

Figure 9 Bits Per Tone Screens


16/40

SA91216

To learn the exact bit count and frequency of a specific tone,

refer to the line just above the graph. This line provides the bit

count for the tone marked by the pointer arrow. In the left screen

shown in the previous gure, the pointer arrow is at tone 34 (146kHz) with 10 bits.

To move the pointer arrow:

1. Press to move the pointer arrow one tone at a time.

2. Press > (F2) to move the pointer arrow to another

tick mark shown on the horizontal axis of the graph.

A page indicator is shown to the right of the screen name. In the

left screen of the previous gure, it reads pg1/11. This indicates

that page 1 out of 11 is displayed. To view other pages, move the

pointer arrow off the page.

A table of the tones can be viewed by pressing F4. An example is

shown in the right screen in Figure 9. Listed for each tone is the

number of bits assigned to it. Press PAGE-UP (F1) or PAGE-DN

(F2) to scroll through all tones.

In either screen, press STORE (F3) to save the results.

To view a narrower range of frequencies (less pages), press ESC

and select a range from the previously described list.


17/40

17VDSL VTU-R Module

3.2.2.2 SNR Per Tone

Measure the signal-to-noise ratio for each downstream tone used

by the modem to transmit the provisioned rate. Results can be

displayed as a SNR per tone graphic or as a table.

During modem initialization, a signal-to-noise measurement is

made for each tone; bit distribution is then optimized to meet the

desired bit rate.

During operation, bit distribution may be adjusted to optimize

bandwidth. The modem constantly monitors the signal-to-noise

ratio for each tone. If a tone degrades, it sends a bit swap com-

mand to adjust the amount of bits assigned to that tone. These

bits may be added to a different tone or taken out completely.

An example 0.0M12.0M screen is shown in the next gure.

SHOWTIME Plan998< SNR GRAPHIC pg1/11

TONE 72 (310 kHz): 10 dB60

0

0 255

>> TABLESTORE

11:50:45

>SHOWTIME Plan998< SNR TABLE

# dB # dB # dB # dB0 0 8 0 16 0 24 01 0 9 0 17 0 25 02 0 10 0 18 0 26 03 0 11 0 19 0 27 04 0 12 0 20 0 28 05 0 13 0 21 0 29 06 0 14 0 22 0 30 07 0 15 0 23 0 31 0

STORE GRAPHICPAGE-UP PAGE-DN

Figure 10 SNR Per Tone Screens

To learn the exact SNR for a specific tone, refer to the line just

above the graph. This line provides the SNR for the tone marked

by the pointer arrow. In the left screen shown in Figure 10, the

pointer arrow is at tone 72 (310 kHz) with a 10 dB SNR.

To move the pointer arrow:

1. Press to move the pointer arrow one tone at a time.

2. Press > (F2) to move the pointer arrow to another

tick mark shown on the horizontal axis of the graph.

The page indicator is shown in the left screen of Figure 10, pg1/11.

It indicates that page 1 out of 11 is shown. To view other pages,

move the pointer off the screen.

Press F4 to view a table of the tones, as shown in the right screen

of Figure 10. The number of bits assigned to each tone is listed.

Use PAGE-UP (F1)/PAGE-DN (F2) to view all available tones.

In either screen, press STORE (F3) to save the results. See Sec-

tion 3.5for details.


18/40

SA91218

3.2.3 Link Measurements

Get information on errors and events.

11:50:45>SHOWTIME Plan998SHOWTIME Plan998SHOWTIME Plan998SHOWTIME Plan998SHOWTIME Plan998SHOWTIME Plan998SHOWTIME Plan998

MAN-22457-001_B00_SSMTT-41V_VTU-R_MMD

Documents

Transcript of MAN-22457-001_B00_SSMTT-41V_VTU-R_MMD