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Noise margin operation

Configuring an ADSL Annex A LIM

3 - 1 4

363-217-018R9.8

Issue 1, August 2005

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Noise margin operation

Introduction

The line tolerates a certain level of random frequency voltage (noise) with respect to its
received signal. Noise margins are defined in decibels (dB). A BER of 10

-7

represents 0dB.

Behavior

At train-up the ADSL transceiver unit (ATU) attempts to reduce the output power if the
maximum noise level is exceeded. If the noise drops below a minimum margin, the ATU
attempts to increase the power output until the noise level is at or above the configured
minimum.

Figure 3-2 Noise margin parameters and power adjustments relationship

LIM power vs. noise

On many loops, a Stinger ADSL or ADSL2+ LIM uses large power margins. To avoid
excessive power margins, you can configure the Stinger unit with a maximum
downstream noise margin value that it translates into a maximum power output value. The
Stinger unit attempts to reduce the transmit power by a maximum of 12dB to achieve the
desired maximum downstream noise margin.

On clean short loops with low requested rates, the margin might still be high but the output
power is reduced. Power reduction is more significant on short loops where the requested
downstream rates are less than the maximum possible—the lower the requested rate, the
lower the transmit power.

Recommended power margin

For a system with typical noise patterns, set the maximum margin to a value close to 8dB.
For a system with greater noise patterns, you can set a higher value.

Reduce output power

Increase output power

Steady-state operations

Target noise margin

0dB margin

Maximum additional
noise margin

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Содержание STGRCR-ELIM-AP-48

Страница 1: ...Stinger ADSL and ADSL2 Line Interface Modules LIMs Module Guide Software version 9 8 363 217 018R9 8 Issue 1 August 2005 ...

Страница 2: ... access the Lucent INS online documentation library at http www lucentdocs com ins Safety compliance and warranty Information Before handling any Lucent Access Networks hardware product read the Edge Access and Broadband Access Safety and Compliance Guide included in your product package See that guide also to determine how products comply with the electromagnetic interference EMI and network comp...

Страница 3: ... support xi How to order xi How to comment xi 1 ADSL LIM Hardware ADSL Protocol support 1 2 ADSL LIM types 1 3 ADSL LIM products and capabilities 1 5 Installing an ADSL or ADSL2 LIM 1 7 Module specifications 1 9 Interpreting LIM status lights 1 11 LIM connectors 1 14 LIM signal and pin assignments 1 15 2 Interface profile and power parameters ADSL and ADSL2 LIM protocols 2 2 ADSL DMT interfaces 2 ...

Страница 4: ...3 16 4 Configuration Examples Examples for configuration of legacy ADSL 4 2 Examples for configuration of ADSL2 line codes 4 4 5 Checking interface status Checking overall status of ADSL DMT interface 5 2 Checking status of the physical interface 5 4 Obtaining statistics about operations 5 7 Displaying ADSL DMT port status and nailed groups 5 9 6 Line testing SELT and DELT support requirements 6 2...

Страница 5: ...Contents v 363 217 018R9 8 Issue 1 August 2005 Built in self testing BIST 6 20 IN Index ...

Страница 6: ... Contents v i 363 217 018R9 8 Issue 1 August 2005 ...

Страница 7: ...72 port LIM status lights 1 12 1 3 Enhanced processor or high speed LIM 1 13 1 4 72 port enhanced processor LIM with integrated line protection 1 14 1 5 50 pin connector 1 15 3 1 Noise margins and dynamic rate adaptation relationship 3 13 3 2 Noise margin parameters and power adjustments relationship 3 14 ...

Страница 8: ... List of Figures v i i i 363 217 018R9 8 Issue 1 August 2005 ...

Страница 9: ...ment provides information about ADSL and ADSL2 LIMs that are used in the following Stinger platforms Stinger FS Stinger FS Stinger LS Stinger LS Stinger RT Stinger Compact Remote IP DSLAM Stinger Compact Remote ATM DSLAM How to use this information product Use this guide to install or configure ADSL or ADSL2 LIMs Safety information Before installing your Stinger unit be sure to read the safety ins...

Страница 10: ...r other type of module an individual guide describes the module s features and provides instructions for configuring the module and verifying its status Configuration Stinger ATM Configuration Guide Describes how to integrate the Stinger into the ATM and Digital Subscriber Line DSL access infrastructure The guide explains how to configure PVCs and shows how to use standard ATM features such as qua...

Страница 11: ...roduct support Document support telephone numbers are 1 888 727 3615 for the continental United States 630 713 5000 for all countries Technical support For technical support contact your local customer support team Reach them via the web at https support lucent com or the telephone number listed under the Technical Assistance Center menu at http www lucent com contact How to order To order Lucent ...

Страница 12: ... About This Information Product x i i 363 217 018R9 8 Issue 1 July 2005 ...

Страница 13: ...er connections and the ADSL protocols supported by these LIMs Contents This chapter describes ADSL LIM hardware information for these topics ADSL Protocol support 1 2 ADSL LIM types 1 3 ADSL LIM products and capabilities 1 5 Installing an ADSL or ADSL2 LIM 1 7 Module specifications 1 9 Interpreting LIM status lights 1 11 LIM connectors 1 14 LIM signal and pin assignments 1 15 ...

Страница 14: ...otocols ANSI T1 413 ITU T G 992 1 Annex A G dmt ITU T G 992 2 G lite ADSL2 protocols In addition to the legacy protocols LIMs with ADSL2 capability also support the ADSL protocols and related standards shown below Important When testing higher data transfer rates on ADSL2 lines network equipment test gear and all links on the end user or network must be able to support 10 100Mbps rates ADSL2 rates...

Страница 15: ...reviously but use newer processor and components that allow additional IP features and the addition of integrated line protection on one model High bandwidth LIMs with ADSL2 capability These cards support all of the protocols listed previously but support a maximum line rate of 24 544Kbps and a total aggregate bandwidth per card of 622Mbps These LIMs also contain enhanced processor components Inte...

Страница 16: ...217 018R9 8 Issue 1 August 2005 Figure 1 1 Stinger LIM faceplates FAULT ACTV POR PORT 1 24 1 24 POR PORT 49 72 49 72 POR PORT 25 48 25 48 FAUL ULT ACTV CTV processor LIM 72 port enhanced 72 port legacy LIM integrated protection 72 port LIM with ...

Страница 17: ... support for 72 port LIMs ADSL LIM product listing LIM Product Codes Initial TAOS Support ADSL support Ports per card Compatible Stinger Chassis STGR LIM AD 48 9 1 142 Legacy ADSL only 48 Stinger FS FS Stinger LS and Stinger MS chassis STGR LIM AD 72 9 3 170 Legacy ADSL only 72 Stinger FS FS Stinger LS and Stinger MS chassis STGR LIM AP 48 9 6 1 ADSL2 48 Stinger FS FS Stinger LS and Stinger MS cha...

Страница 18: ...inger FS FS Stinger LS and Stinger MS chassis With TAOS release 9 7 2 high bandwidth LIMs are only supported in units with IP2100 IP control modules STGRCR LIM AP 48 9 6 0 ADSL2 48 Stinger Compact Remote ATM DSLAM TAOS 9 6 1 or later is required for ADSL2 support on the Stinger Compact Remote STGRCR ELIM AP 48 9 8 0 ADSL2 48 Stinger Compact Remote IP DSLAM LIM Product Codes Initial TAOS Support AD...

Страница 19: ... 16 16 15 15 14 14 13 13 12 12 11 11 10 10 ETH ERN ET 9 9 FDX ACT TX CD MAJO R MINO R MAS TER TRUN K STAT US 1 2 3 4 5 6 DIAG POR T ETH ERN ET 8 8 FDX ACT TX CD MAJO R MINO R MAS TER TRUN K STAT US 1 2 3 4 5 6 DIAG POR T 7 7 6 6 5 5 4 4 3 3 2 2 1 1 16 16 15 15 14 14 13 13 12 12 11 11 10 10 ETH ERN ET 9 9 FDX ACT TX CD MAJO R MINO R MAS TER TRUN K STAT US 1 2 3 4 5 6 DIAG POR T ETH ERN ET 8 8 FDX A...

Страница 20: ...s firmly to be sure it is fully seated Depress both ejectors simultaneously 3 If the LIM is equipped with an ejector lock slide the ejector lock up 4 Using a number 2 Phillips screwdriver secure the LIM by tightening the thumbscrews E N D O F S T E P S Verifying operational status Once the LIM is installed Allow three to five minutes for it to become operational Then observe the behavior of the st...

Страница 21: ... 72 115W STGR LIPM A2P 72 115W STGR LIM A2P 72 HB 115W STGRRT LIM AP 72 110W STGR LIM AP 48 76W STGR LIM A2P 48 HB 82W STGRRT LIM AP 48 76W STGR LIM AD 48 135W STGR LIM AD 72 130W STGRRT LIM AD 72 130W STGRCR LIM AP 48 50 4W STGRCR ELIM AP 48 50W Temperature range FS LS versions 32 F through 131 F 0 C through 55 C CR RT versions 40 F to 149 F 40 C to 65 C Relative Humidity 10 95 non condensing Max...

Страница 22: ...ertification Bellcore GR 63 CORE NEBS Level 1 3 Bellcore GR 1089 CORE EN IEC 60950 ADSL interface standards ANSI T1 413 1998 full rate ITU T G 992 1 G dmt ITU T G 992 2 G lite ITU T G 994 1 G hs ITU T G 997 1 physical layer management ITU T G 992 3 G dmt bis ADSL2 ITU T G 992 4 G lite bis ADSL2 lite ITU T G 992 5 G adsl2plus ADSL2 For additional information see Legacy ADSL Annex A protocols p 1 2 ...

Страница 23: ...d line protection module LPM Enhanced processor LIMs enhanced processor LIMs with integrated line protection and high bandwidth LIMs only have module status lights on their face plate LIMs with integrated line protection also have connectors for physical line connections Important These status lights illuminate briefly upon startup or restart then remain dark until the module passes its power on s...

Страница 24: ... Indication 1 ACTIVE Green The module or port is fully operational and no errors have been detected 2 FAULT Orange The module failed to pass its POST 3 STBY Orange The module is a designated spare The control module switches traffic to the module if one of the other modules fails 4 BYPASS Orange The module is in bypass mode The module redundancy feature is activated c e d f b ...

Страница 25: ... port Green The local and remote ends of the physical line have achieved frame synchronization and the local end of the ATM link has achieved cell delineation If the light is not illuminated the port is inactive Light Color Indication Light Color Indication 1 FAULT Orange The module failed to pass its POST 2 ACTV Green The module or port is fully operational and no errors have been detected FAUL U...

Страница 26: ...other LIMs require an associated line protection module LPM for connections to line facilities LIM faceplate connectors A 72 port LIM with integrated line protection has three 50 pin connectors on its face place as shown in Figure 1 4 Figure 1 4 72 port enhanced processor LIM with integrated line protection POR PORT 1 24 1 24 POR PORT 49 72 49 72 POR PORT 25 48 25 48 FAUL ULT ACTV CTV ...

Страница 27: ...t connections to copper facilities without a separate LPM Each 50 pin connector on this LIM provides access for 24 subscriber lines Connections for the connectors on this LIM are detailed in the following three tables Important Connections for line protection modules are described in the Stinger Line Protection Module LPM Guide PORT 1 24 connector pin outs 1 26 50 25 Pin Signal Color code Pin Sign...

Страница 28: ...Orange yellow 42 Line 17 tip Yellow orange 18 Line 18 ring Green yellow 43 Line 18 tip Yellow green 19 Line 19 ring Brown yellow 44 Line 19 tip Yellow brown 20 Line 20 ring Slate yellow 45 Line 20 tip Yellow slate 21 Line 21 ring Blue violet 46 Line 21 tip Violet blue 22 Line 22 ring Orange violet 47 Line 22 tip Violet orange 23 Line 23 ring Green violet 48 Line 23 tip Violet green 24 Line 24 ring...

Страница 29: ...g Orange yellow 42 Line 41 tip Yellow orange 18 Line 42 ring Green yellow 43 Line 42 tip Yellow green 19 Line 43 ring Brown yellow 44 Line 43 tip Yellow brown 20 Line 44 ring Slate yellow 45 Line 44 tip Yellow slate 21 Line 45 ring Blue violet 46 Line 45 tip Violet blue 22 Line 46 ring Orange violet 47 Line 46 tip Violet orange 23 Line 47 ring Green violet 48 Line 47 tip Violet green 24 Line 48 ri...

Страница 30: ...ing Brown black 39 Line 62 tip Black brown 15 Line 63 ring Slate black 40 Line 63 tip Black slate 16 Line 64 ring Blue yellow 41 Line 64 tip Yellow blue 17 Line 65 ring Orange yellow 42 Line 65 tip Yellow orange 18 Line 66 ring Green yellow 43 Line 66 tip Yellow green 19 Line 67 ring Brown yellow 44 Line 67 tip Yellow brown 20 Line 68 ring Slate yellow 45 Line 68 tip Yellow slate 21 Line 69 ring B...

Страница 31: ...rameters used to set interface power Adaptive configuration of rates interleave and delay is covered separately Contents This chapter describes configuration information for these topics ADSL and ADSL2 LIM protocols 2 2 ADSL DMT interfaces 2 3 The AL DMT profile 2 4 line config subprofile parameters 2 6 Parameters that affect line speed 2 10 Power level parameters 2 11 ...

Страница 32: ...413 ITU T G 992 1 Annex A G dmt ITU T G 992 2 G lite LIMs with ADSL2 capability Depending on the version of TAOS that is installed ADSL Annex A LIMs with ADSL2 capability support the protocol standards shown in the following table ADSL protocols and related standards Initial support G 992 3 Annex A G dmt bis TAOS 9 6 0 G 992 4 Annex A G lite bis TAOS 9 6 0 G 992 5 Annex A G adsl2plus TAOS 9 6 0 G ...

Страница 33: ...t 2 of a stand alone Stinger unit dir al dmt 44 11 09 2003 23 00 13 shelf 1 slot 2 1 1 2 1 41 11 20 2003 00 47 43 shelf 1 slot 2 2 1 2 2 41 11 20 2003 00 47 53 shelf 1 slot 2 3 1 2 3 44 11 22 2003 18 48 42 shelf 1 slot 2 4 1 2 4 44 11 22 2003 15 19 28 shelf 1 slot 2 5 1 2 5 38 10 14 2003 13 32 29 shelf 1 slot 2 6 1 2 6 38 10 14 2003 13 32 29 shelf 1 slot 2 7 1 2 7 44 11 22 2003 15 19 57 shelf 1 sl...

Страница 34: ...r spectral density PSD and power level parameters Fast and interleaved bit rate parameters Interleaving delay parameters Noise margin parameters Trellis encoding Automatic Gain Control Dynamic rate adaptive parameters Only active with LIMs with ADSL2 capability Line activation and DMT parameters Each direction of traffic upstream and downstream on an ADSL DMT line can have a different minimum and ...

Страница 35: ...in the Stinger unit enabled Enables the ADSL DMT interface An ADSL DMT line is disabled until you activate the line in the al dmt profile sparing mode Enables or disables port redundancy sparing and specifies the mode The default value inactive disables LIM port redundancy sparing The automatic setting activates automatic sparing for the port The values of the error threshold parameters specified ...

Страница 36: ... vpi 15 call route info any shelf any slot 0 rate adapt mode up automatic at startup rate adapt mode down automatic at startup rate adapt ratio up 100 rate adapt ratio down 100 max aggr power level up 13 max aggr power level down 20 max power spectral density 40 line code auto select line latency down fast line latency up fast trellis encoding yes gain default 20 db upstream start bin 6 upstream e...

Страница 37: ...n using ITU T G 992 2 protocol ansi dmt The LIM attempts to train using ANSI T1 413 1998 protocol g dmt The LIM attempts to train using ITU T G 992 1 protocol legacy mode supported only for 24 port ADSL LIMs The LIM attempts to train to legacy Alcatel devices such as the CopperCom MXR integrated access device IAD modem etsi annex b supported only for Annex B LIMs The LIM attempts to train using ET...

Страница 38: ...ate parameters p 3 9 trellis encoding Enables disables trellis encoding Trellis encoding is specified in the DMT standard The default is yes upstream start bin Specifies the starting frequency bin for upstream transmission Valid range is 0 through 31 The default value is 6 upstream end bin Specifies the ending frequency bin for upstream transmission Valid range is 0 through 31 The default value is...

Страница 39: ...nnex C LIM alcatel us 413 boost Not used psd mask down This parameter is only applicable when the line trains to adsl2re The following masks are currently supported flat m1 the default m2 For optimum inter operability results the psd mask should be set to m1 Important The command line help response may list additional masks that are not supported Parameter Setting ...

Страница 40: ...fied or detected the line latency down and line latency up parameters are automatically set to the value interleave All other al dmt profile parameters remain the same regardless of the protocol used BIN frequency ranges The upstream and downstream start and end bins define the frequency ranges for upstream and downstream data The frequency for a particular bin is defined as the bin number multipl...

Страница 41: ...wer level up 13 max aggr power level down 20 max power spectral density 40 gain default 16 db Important If you lower the default value the line consumes less power and has less capacity The default value is the maximum allowed setting Parameter descriptions Parameter Description max aggr power level up Not used max aggr power level down Specifies the maximum aggregate power level on the downstream...

Страница 42: ... Power level parameters Interface profile and power parameters 2 1 2 363 217 018R9 8 Issue 1 August 2005 ...

Страница 43: ...also described Contents This chapter describes configuration information for these topics Bit rate interleave and delay considerations 3 2 Interleave path config bit rate parameters 3 3 Rate adaptive mode parameters 3 5 Rate adaption 3 6 The interleave path config delay parameters 3 7 The fast path config bit rate parameters 3 9 margin config subprofile 3 10 Dynamic rate adaptive noise margin 3 13...

Страница 44: ...n the current software version both upstream and downstream traffic must use the same channel Interleave path bit rate settings The bit rate parameter settings control the use of the interleave path channel for both upstream and downstream traffic Relationship to line latency setting The line latency up and line latency down settings in the line config subprofile determine which channel is used in...

Страница 45: ...up 1024 planned bitrate down 8000 Parameter descriptions Parameter Setting min bitrate up Specifies the minimum bit rate for upstream traffic from 0Kbps through 2016Kbps The default value is 128Kbps Important Not valid for the rate adaptation setting of operator controlled min bitrate down Specifies the minimum bit rate for downstream traffic The valid settings are 0Kbps through 18016Kbps 0Kbps th...

Страница 46: ...trate down 32 write max bitrate down Specifies the maximum bit rate for downstream traffic The valid settings are 0Kbps through 18016Kbps 0Kbps through 24544Kbps The default value is 8000Kbps Important Not valid for the rate adaptation setting of operator controlled planned bitrate up Specifies the constant bit rate for upstream traffic when operator controlled rate adaptive mode is in use Valid v...

Страница 47: ...rate adapt mode down automatic at startup rate adapt ratio up 100 rate adapt ratio down 100 Parameter descriptions Parameter Setting rate adapt mode up Specifies the rate adaptive mode for upstream and downstream training The default is automatic at startup With the setting operator controlled the line trains upstream using a constant planned bit rate rate adapt mode down Not used rate adapt ratio...

Страница 48: ... bit rate was too high Each direction can have a different minimum and maximum bit rate and use the fast or interleaved ADSL channel Dual latency which can use both the fast and interleaved channels in both directions is not currently supported Operator controlled This rate adaptation setting starts the line at a specific planned bit rate with an acceptable target noise margin and maintains that r...

Страница 49: ...ues for specifying the maximum tolerable delay for interleaver deinterleaver operations in AL DMT any shelf any slot 0 interleave path config max delay up 16 max delay down 16 min inp down auto Parameter descriptions Parameter Setting max delay up Specifies the maximum milliseconds of delay allowed in the upstream direction as a result of interleaving data The valid range is 1 through 64 The defau...

Страница 50: ...m DMT smybols with impulse noise errors that can be corrected Settings for greater correction also result in greater delay and lower data rates The setting is only valid on lines using ADSL2 or ADSL2 protocols The valid settings are no symbols half symbol one symbol two symbols auto the default INP is automatically managed based on requested data rate and delay Important In INP AUTO mode maximum r...

Страница 51: ...ed bitrate up 1024 planned bitrate down 8000 Important For line code settings of adsl2plus adsl2 or adsl2re the default latency setting of fast will result in lines that train up with minimum interleaved latency 1 millisecond The resulting rates are reported in the physical status sub profile as up stream rate fast and down stream rate fast Parameter descriptions The fast path config subprofile an...

Страница 52: ...trigger rate adaption noise margin parameter defaults The following default values configure the target noise margins on the ADSL DMT line in AL DMT any shelf any slot 0 margin config target noise margin up 6 target noise margin down 6 min noise margin up 6 min noise margin down 6 max add noise margin up 31 max add noise margin down 31 max margin enabled no Noise margin parameter descriptions Para...

Страница 53: ... rate adapt during normal operations The valid range is 0dB through 31dB with a practical limitation of 15dB set by the modem software The default is 6dB min noise margin up Not currently supported Any value entered for this parameter is not currently implemented by TAOS min noise margin down Not currently supported Any value entered for this parameter is not currently implemented by TAOS max add ...

Страница 54: ...econds the downstream noise margin can be above the value specified in ra downshift margin down before the line bit rate attempts to adapt The valid range is 1 through 255 ra upshift int up Not used ra downshift margin down Specifies a downstream noise margin relative to 0dB If the downstream noise margin remains below this value for more than the specified time interval in ra downshift int down t...

Страница 55: ...which a noise level is maintained provided that the maximum or minimum bit rate has not been reached Figure 3 1 Noise margins and dynamic rate adaptation relationship p 3 13 illustrates the relationship between margins and dynamic rate adaptation Important When dynamic rate adaptation is selected the upstream data rate is set in the same manner described for the automatic at startup setting Figure...

Страница 56: ...s large power margins To avoid excessive power margins you can configure the Stinger unit with a maximum downstream noise margin value that it translates into a maximum power output value The Stinger unit attempts to reduce the transmit power by a maximum of 12dB to achieve the desired maximum downstream noise margin On clean short loops with low requested rates the margin might still be high but ...

Страница 57: ...ximum power margin value to 10 in AL DMT shelf 1 slot 2 1 margin config set max add noise margin down 10 set max margin enabled yes Setting limitation You cannot set a value for the max add noise margin down parameter to a value that is less than that of the target noise margin down parameter Doing so causes the system to generate the following error message error Setting in MARGIN not supported f...

Страница 58: ... fully connected How connections work with call control Connections are accepted when the modem has not fully trained up to the port up state If a LIM interface with an active connection changes from a port up state to the state it was in before it was fully trained the connection remains connected Connections are broken only if the physical slot or line stops operating or is disabled by an admini...

Страница 59: ...e established when the line state is up and disallows calls when the line state is down yes The Stinger call control mechanism ignores the line state and allows calls to be established on a port as long as the specified slot is operational and the specified port is enabled ignore lineup In a line profile specifies whether the line status of a slot has an effect on the Stinger call control mechanis...

Страница 60: ... Configuring call control Configuring an ADSL Annex A LIM 3 1 8 363 217 018R9 8 Issue 1 August 2005 ...

Страница 61: ...is chapter provides examples that can be used as general guides for initial configuration of an ADSL DMT interface Contents This chapter describes configuration information for these topics Examples for configuration of legacy ADSL 4 2 Examples for configuration of ADSL2 line codes 4 4 ...

Страница 62: ...ig rate adapt mode down operator controlled set fast path config planned bitrate up 56 set interleave path config planned bitrate down 1500 write Automatic Bit rate and protocol detection The following commands configure the interface to automatically detect and use the correct legacy ADSL protocol and automatically select the best possible rate at startup time They specify a possible upstream bit...

Страница 63: ...on of legacy ADSL Configuration Examples 363 217 018R9 8 Issue 1 August 2005 4 3 Reserving a VPI The following commands reserve VPI 7 for VP switching on the interface read al dmt 1 3 4 set line config vp switching vpi 7 write ...

Страница 64: ... mode up automatic at startup set line config rate adapt mode down automatic at startup set line config line latency down interleave set line config line latency up interleave set line config downstream end bin 255 write Configuration for extended reach ADSL2 READSL2 Setting the line code in the line config subprofile to adsl2re will configure an al dmt port to attempt to use the READSL2 protocol ...

Страница 65: ...it is unsuccessful read al dmt 1 1 1 set enabled yes set line config line code adsl2plus set line config rate adapt mode up automatic at startup set line config rate adapt mode down automatic at startup set line config line latency down interleave set line config line latency up interleave set line config downstream end bin 511 write Important Increased line rates that are possible with ADSL2 LIMs...

Страница 66: ... Examples for configuration of ADSL2 line codes Configuration Examples 4 6 363 217 018R9 8 Issue 1 August 2005 ...

Страница 67: ...examples for checking the status of an ADSL DMT interface Contents This chapter describes configuration information for these topics Checking overall status of ADSL DMT interface 5 2 Checking status of the physical interface 5 4 Obtaining statistics about operations 5 7 Displaying ADSL DMT port status and nailed groups 5 9 ...

Страница 68: ... 0 vpi vci range vpi 0 15 vci 32 127 vp switching vpi 15 physical status 0 coe port up 128 2944 fast fast 1 4 1 2 physical statistic 1 1 1 yes 3 passed 3 6 56 19 5 41 Parameter descriptions Parameter Setting line state Indicates the overall state of the line Possible values are as follows does not exist Link is not physically present on board disabled Line is disabled active Multipoint is establis...

Страница 69: ...ncy state occurred sparing change counter Indicates that each redundancy change for example primary to secondary secondary to primary increments the counter The counter is reset when the Stinger starts or restarts vpi vci range Indicates the valid range of VPI and VCI for the circuits established for the line This range can change only after LIM reboot vp switching vpi Indicates the VPI to be used...

Страница 70: ...subprofile example Following are the Physical Status subprofile parameters shown with sample settings for an active interface in AL DMT STAT shelf 1 slot 3 4 physical status if group index 0 unit type coe dev line state port up up stream rate fast 0 down stream rate fast 0 up stream rate interleave 128000 down stream rate interleave 2944000 up stream latency interleave down stream latency interlea...

Страница 71: ... on the line delt running A DELT test is running on the line up stream rate fast Indicates the upstream data rate in bps when latency is fast Zero means that latency is set to interleave or the data rate is unknown down stream rate fast Indicates the downstream data rate in bps when latency is fast Zero means that latency is set to interleave or the data rate is unknown up stream rate interleave I...

Страница 72: ...ailure accum bit err Indicates the number of actual bit errors detected during the continuous BERT num sec valid Indicates the number of error free seconds during the continuous BERT num sec invalid Indicates how many error seconds are detected during the continuous BERT operational mode Indicates ADSL coding protocol as automatically detected or set by user Valid values are ansi dmt g dmt g lite ...

Страница 73: ... down 19 noise margin up 5 attenuation up 41 output power up 11 near end fec 0 near end crc 0 near end hec 0 far end fec 10 far end crc 0 far end hec 0 received rs blcks 104073 transmitted rs blocks 416772 incoming cells 92 outgoing cells 100 Physical statistic details Parameter Description line up timer Indicates how long the interface has been up days hours and minutes in dd hh mm format It is r...

Страница 74: ...ear end fec Indicates forward error correction FEC errors detected by the COE ADSL transceiver unit ATU near end crc Indicates cyclic redundancy check CRC errors detected by the COE ATU near end hec Indicates header error control HEC errors detected by the COE ATU far end fec Indicates forward error correction FEC errors detected by the CPE ATU far end crc Indicates cyclic redundancy check CRC err...

Страница 75: ...llowing dmtal command output shows the nailed group numbers for an ADSL DMT module in slot 4 dmtal a All ADSL lines dvOp dvUpSt dvRq sAdm nailg Line 1 4 1 Up Idle UP UP 00151 Line 1 4 2 Up Idle UP UP 00152 Line 1 4 3 Up Idle UP UP 00153 Line 1 4 4 Up Idle UP UP 00154 Line 1 4 5 Up Idle UP UP 00155 Line 1 4 6 Up Idle UP UP 00156 Line 1 4 7 Up Idle UP UP 00157 Line 1 4 8 Up Idle UP UP 00158 Line 1 4...

Страница 76: ... Displaying ADSL DMT port status and nailed groups Checking interface status 5 1 0 363 217 018R9 8 Issue 1 August 2005 ...

Страница 77: ...T and DELT information for these topics SELT and DELT support requirements 6 2 SELT and DELT uses 6 3 SELT and DELT procedures 6 4 SELT and DELT caveats 6 5 Using profile parameters for SELT and DELT 6 7 Using the seltcmd command 6 11 Using the deltcmd command 6 13 Test results 6 15 seltcmd and deltcmd considerations 6 16 Error conditions related to SELT and DELT 6 17 Test data analysis 6 18 Built...

Страница 78: ...pport for SELT and DELT Earlier releases of TAOS do not support SELT or DELT Stinger hardware SELT and DELT are supported only on LIMs with ADSL2 capability However SELT and DELT are not supported by the ADSL2 LIM designed for use in the Stinger Compact Remote IP DSLAM See ADSL LIM product listing p 1 5 Environmental SELT operates best in an environment where the subscriber loop is un terminated D...

Страница 79: ...op length Secondary SELT uses SELT can also be used to perform the following tests Detection of cable breaks Detection of electrical shorts Analysis of echo delay and shape Estimation of inband noise vs frequency Estimation of margin vs rate Estimation of termination response vs loop length DELT uses DELT uses a diagnostic handshake defined by ADSL2 standards This handshake requires supporting har...

Страница 80: ...nable the port 6 Transfer the raw test results using TFTP to an external host for analysis 7 Analyze the data using external tools SELT and DELT initiation You can initiate and monitor a SELT or DELT operation and transfer test results using one of two methods Setting parameters in the line diag and selt delt params profiles either through the command line interface or SNMP commands Using the selt...

Страница 81: ...he results are not transferred within this period then the selt delt operation state parameter will report stopped and you will have to rerun SELT or DELT Ports being tested For both SELT or DELT the port to be tested must be disabled For DELT the line code parameter in the line diag profile for the port must be set to adsl2 Aborting an operation There is no SELT or DELT abort operation Although t...

Страница 82: ... SELT and DELT caveats Line testing 6 6 363 217 018R9 8 Issue 1 August 2005 Log messages The system generates info level and error level log messages for start stop and error events ...

Страница 83: ... params contains the following parameters used for the TFTP transfer of results The TFTP server IP address The TFTP port number The filename to under which results are stored on the server The amount of time allowed for the actual TFTP transfer after a SELT or DELT test The system creates line diag and line diag stat profiles for each ADSL port in the Stinger system There is only one instance of t...

Страница 84: ...nd save the line diag profile the setting for the selt delt enable parameter reverts to the default no selt delt test Specify one of the following values no selt delt test the default Take no action selt test Initiate a SELT operation delt test Initiate a DELT operation tftp Initiate transfer of SELT or DELT results clear timer Clear the TFTP timer associated with this slot For information about s...

Страница 85: ...lt test running DELT is in progress selt delt tftp running File transfer of test results via TFTP is in progress selt test error SELT failed delt test error DELT failed selt delt tftp error TFTP transfer failed selt test done SELT successfully completed delt test done DELT successfully completed selt delt tftp done Test results have been successful transferred selt delt running other SELT or DELT ...

Страница 86: ...lt file SeltDelt dat on the host at 135 1 65 121 read selt delt params set ip tftp 135 1 65 121 write f read line diag 1 13 12 set selt delt enable selt delt tftp write f selt delt params results filename Name of the destination file on the host to which data results will be saved Specify a text string of up to 254 characters By default the system saves tests results to a file called SeltDelt dat ...

Страница 87: ...2 of an ADSL2 LIM in slot 13 of shelf 1 seltCmd 1 13 12 SELT operation started A test can take up to three minutes to complete When testing is completed the system displays the following message SELT complete on 1 13 12 Syntax element Specifies shelf slot port Logical address of the port to be tested p tftp port TFTP port number which the TFTP server daemon listens to for TFTP transfers If no port...

Страница 88: ...esults from the previous test via TFTP to a host with an IP address of 135 17 134 96 seltcmd t 135 17 134 96 1 13 12 SELT data transfer sending selt 1 13 12 to 135 17 134 96 SELT data transfer 5000 bytes sent SELT data transfer completed In this example because no file name was specified the system will derive the filename selt 1 13 12 from the logical address of the port being tested 1 13 12 ...

Страница 89: ... launch DELT on port 12 of an ADSL2 LIM in slot 14 of shelf 1 deltCmd 1 13 2 DELT operation started A test can take up to three minutes to complete When testing is completed the system displays the following message DELT complete on 1 13 2 Syntax element Specifies shelf slot port Logical address of the port to be tested t host TFTP host IP address p tftp port TFTP port number which the TFTP server...

Страница 90: ...r re enabling the port the commands shown in the following example transfer the results from the previous test via TFTP to a host with an IP address of 135 17 134 96 deltcmd t 135 17 134 96 1 13 2 DELT data transfer sending selt 1 13 2 to 135 17 134 96 DELT data transfer 5000 bytes sent DELT data transfer completed ...

Страница 91: ...arameter in the selt delt params profile If the results are not transferred within this period then the selt delt operation state parameter will report stopped and you will have to rerun SELT or DELT Transfer failures When TFTP transfer fails and the selt delt operation state parameter reports selt delt tftp error you can retry the TFTP transfer The number of retries is limited only by the number ...

Страница 92: ... line diag stat and selt delt params parameter settings are not affected by use of the seltcmd and deltcmd commands Status information not displayed Only test start stop or error events are displayed to the CLI no status information is provided Test results can be overwritten No TFTP timer is available to protect overwriting of test data from one test to the next Running back to back tests will ca...

Страница 93: ...ress on the slot The LIM is not ADSL2 ADSL2 capable A built in self testing BIST operation is running the port SELT or DELT test results are waiting for TFTP transfer on the slot The TFTP timer is still running Attempting a DELT test if the line code parameter in the line profile is not set to adsl2 Error conditions during transfer of results The system generates error messages when you attempt TF...

Страница 94: ...n status of the loop open or closed An in band noise plot of magnitude vs frequency A termination response plot of magnitude vs distance A signal to noise SNR margin plot of margin vs rate DELT analysis requirements The DELT test data is determined using the handshake mechanism defined for ADSL2 Consequently an ADSL2 modem must be installed at the subscriber location and an ADSL2 capable LIM must ...

Страница 95: ...ived signal power and received noise power per sub carrier or bin This information provides a view of the capacity of the channel Maximum attainable data rate possible maximum rate that the DELT algorithm has calculated after channel characterization The last state that successfully completed during the previous initialization attempt ...

Страница 96: ...profile to yes For example in LINE DIAG shelf 1 slot 1 1 set bist enabled yes BIST test limitation You cannot run the test on a line that is enabled If you attempt to run the BIST test while a line is enabled the system generates the following error message LOG error Shelf 1 Slot 14 Time 17 07 03 Line cannot be enabled during line diag Checking BIST status and result parameters The bist operation ...

Страница 97: ... details Parameter Specifies bist operation state Status of the built in self test Possible values are active BIST operation is active stopped BIST operation is stopped bist result Result of the built in self test Possible values are none BIST is disabled pass the port test was successful fail the port test failed ...

Страница 98: ... Built in self testing BIST Line testing 6 2 2 363 217 018R9 8 Issue 1 August 2005 ...

Страница 99: ...nfiguration ADSL2 example 4 4 ADSL2 example 4 5 legacy ADSL examples 4 2 READSL2 example 4 4 D DELT error conditions 6 17 example test 6 13 TAOS deltcmd 6 13 TAOS parameters 6 7 test analysis 6 18 test initiation 6 4 6 7 test results 6 15 uses 6 3 deltcmd 6 13 DMT line codes 2 7 DMT See AL DMT dmtal command 5 9 E ejector locks 1 7 Electromagnetic compliance 1 10 H humidity operating 1 9 I installa...

Страница 100: ...parameters 3 12 S SELT error conditions 6 17 example test 6 10 6 11 TAOS parameters 6 7 TAOS seltcmd 6 11 TAOS support 6 2 test analysis 6 18 test initiation 6 4 6 7 test results 6 15 uses 6 3 seltcmd 6 11 settings 3 6 software support 1 5 status lights enhanced processor or high bandwidth LIMs 1 13 legacy LIM 1 12 T TAOS supported versions 1 5 temperature operating 1 9 test initiation SELT and DE...

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