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Drop and Insert Commands

2-80 Configuring T1/E1 and T3/E3 Subsystems

Drop and Insert Commands

ThesecommandseffecttheoperationoftheT1/E1DropandInsertNIM.

drop-and-insert-group

Thiscommand,whichtakesnoparameters,instructstheT1controllertoofferallitsidletimeslots

notconfiguredaspartofachannel‐grouptotheDropandInsert(D&I)agent.TheT1controllerthus

operatesinmixedData/Voicemode.

ForT1lines,robbedbitsignalingisusedforChannel‐

AssociatedSignaling(CAS).RobbedBit

Signalingusesonebitofeachtimeslotforsignalingeverysixthframe.TheXSRisconfiguredin

suchawaythatRBSisdisabledfordatati meslots(timeslotsbelongingtoachannelgroup)and

datacanbepassedat64or56Kbs.

Whenthecommand

isissuedforbothT1controllersontheNIM,timeslotswhichareidleonboth

portswillbeconnected.

ItismandatorythattheT1portconnectedtotheCentralOfficederiveitstimingfromtheup

streamlineandtheportconnectedtothePBXsupplytimingtothe

downstreamline.

Syntax

drop-and-insert-group [cas | clear]

Syntax of the “no” Form

ThenoformofthiscommandremovesDropandInsertfunctionality:

no drop-and-insert-group

P‐bitSeverelyErrSecs(Validfor

C‐bit&M13)

PSESisasecondwith44ormorePCVs,oneormoreOut‐of‐Framedefects,or

adetectedincomingAIS.Thisgaugeisnotincrementedwhenunavailable

secondsarecounted.

SeverelyErrSecs(Validforg751) SESisasecondin

whichmorethen43LCVwerecountedoroneormoreOut‐

of‐Framedefects,oradetectedincomingAIS.Thisgaugeisnotincremented

whenunavailablesecondsarecounted.

SeverelyErrFramingSecs(Valid

forC‐bit,M13&g751)

SEFSisasecondwithoneormoreOut‐of‐

Framedefectsoradetected

incomingAIS.

UnavailableSecs(ValidforC‐bit,

M13&g751)

UASarecalculatedbycountingtheperiodtheinterfaceisunavailable.

LineErrSecs LESisasecondwithoneormorecodeviolationsoroneormoreLOSdefects.

C‐bitErroredSecs(ValidforC‐

bit)

CESisasecondwithoneormoreC‐bitcodeviolations(CCV),oneormore

Out‐of‐Framedefects,oradetectedincomingAIS.Thisgaugeisnot

incrementedwhenUASsarecounted.

C‐bitSeverelyErroredSecs(Valid

forC‐bit)

CSESisasecondwith44ormore

CCVs,oneormoreOut‐of‐Framedefects,or

adetectedincomingAIS.ThisgaugeisnotincrementedwhenUASsare

counted.

cas

ForuseifthedevicedownstreamisaPBXusingrobbitsignalling.Enteringno

parameterisequivalenttoenteringthenocommand.

clear

ForuseifthedevicedownstreamhandlesdatasuchasaVoiceoverIP.

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