Measuring ERL via 7900 Phone (show call active voice)

Unanswered Question
Mar 30th, 2006
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Via the Tone softkey I called my cell phone and generated a 1004 Hz tone at -15 dB, then did a show call active voice.


Since the ERLLevel=30, I shouldn't have to adjust input gain/out attenutation. One person in our office states she has 2-3 calls a day where she hears herself. No other complaints out of 30 phones. No headset, CCM 4.1(3)SR3 with load P00307020400, H323 PRI Gateway (no analog).

JAX-3845#show call active voice

Telephony call-legs: 1

SIP call-legs: 0

H323 call-legs: 1

Call agent controlled call-legs: 0

SCCP call-legs: 0

Multicast call-legs: 0

Total call-legs: 2


GENERIC:

SetupTime=315354050 ms

Index=1

PeerAddress=1024

PeerSubAddress=

PeerId=4000

PeerIfIndex=114

LogicalIfIndex=0

ConnectTime=315363060 ms

CallDuration=00:02:21 sec

CallState=4

CallOrigin=2

ChargedUnits=0

InfoType=speech

TransmitPackets=7374

TransmitBytes=1179840

ReceivePackets=7371

ReceiveBytes=1179360

VOIP:

ConnectionId[0x80E0515D 0xF3DDB11D 0xA000000 0xA0B0A5A]

IncomingConnectionId[0x80E0515D 0xF3DDB11D 0xA000000 0xA0B0A5A]

CallID=8333

RemoteIPAddress=10.11.10.12

RemoteUDPPort=25456

RemoteSignallingIPAddress=10.11.10.12

RemoteSignallingPort=60630

RemoteMediaIPAddress=10.11.10.90

RemoteMediaPort=25456

RoundTripDelay=0 ms

SelectedQoS=best-effort

tx_DtmfRelay=h245-alphanumeric

FastConnect=FALSE


AnnexE=FALSE


Separate H245 Connection=TRUE


H245 Tunneling=FALSE


SessionProtocol=cisco

ProtocolCallId=

SessionTarget=

OnTimeRvPlayout=145930

GapFillWithSilence=0 ms

GapFillWithPrediction=0 ms

GapFillWithInterpolation=0 ms

GapFillWithRedundancy=0 ms

HiWaterPlayoutDelay=65 ms

LoWaterPlayoutDelay=60 ms

TxPakNumber=7302

TxSignalPak=0

TxComfortNoisePak=0

TxDuration=146045

TxVoiceDuration=146045

RxPakNumber=7299

RxSignalPak=0

RxDuration=0

TxVoiceDuration=145975

VoiceRxDuration=145930

RxOutOfSeq=0

RxLatePak=0

RxEarlyPak=0

PlayDelayCurrent=60

PlayDelayMin=60

PlayDelayMax=65

PlayDelayClockOffset=-804758489

PlayDelayJitter=0

PlayErrPredictive=0

PlayErrInterpolative=0

PlayErrSilence=0

PlayErrBufferOverFlow=5

PlayErrRetroactive=0

PlayErrTalkspurt=0

OutSignalLevel=-15

InSignalLevel=-74

LevelTxPowerMean=0

LevelRxPowerMean=-745

LevelBgNoise=0

ERLLevel=30

ACOMLevel=58

ErrRxDrop=0

ErrTxDrop=0

ErrTxControl=0

ErrRxControl=0

ReceiveDelay=60 ms

LostPackets=0

EarlyPackets=0

LatePackets=0

SRTP = off

VAD = disabled

CoderTypeRate=g711ulaw

CodecBytes=160

Media Setting=flow-through

CallerName=Jonathan Nawab

CallerIDBlocked=False

OriginalCallingNumber=1024

OriginalCallingOctet=0x21

OriginalCalledNumber=93383245

OriginalCalledOctet=0xA0

OriginalRedirectCalledNumber=

OriginalRedirectCalledOctet=0xFF

TranslatedCallingNumber=1024

TranslatedCallingOctet=0x21

TranslatedCalledNumber=93383245

TranslatedCalledOctet=0xA0

TranslatedRedirectCalledNumber=

TranslatedRedirectCalledOctet=0xFF

GwReceivedCalledNumber=93383245

GwReceivedCalledOctet3=0xA0

GwReceivedCallingNumber=1024

GwReceivedCallingOctet3=0x21

GwReceivedCallingOctet3a=0x81

MediaInactiveDetected=no

MediaInactiveTimestamp=

MediaControlReceived=

Username=


GENERIC:

SetupTime=315354130 ms

Index=1

PeerAddress=93383245

PeerSubAddress=

PeerId=77

PeerIfIndex=126

LogicalIfIndex=61

ConnectTime=315363060 ms

CallDuration=00:02:26 sec

CallState=4

CallOrigin=1

ChargedUnits=0

InfoType=speech

TransmitPackets=7621

TransmitBytes=1280328

ReceivePackets=7624

ReceiveBytes=1219840

TELE:

ConnectionId=[0x80E0515D 0xF3DDB11D 0xA000000 0xA0B0A5A]

IncomingConnectionId=[0x80E0515D 0xF3DDB11D 0xA000000 0xA0B0A5A]

CallID=8334

TxDuration=152475 ms

VoiceTxDuration=152475 ms

FaxTxDuration=0 ms

CoderTypeRate=g711ulaw

NoiseLevel=-73

ACOMLevel=58

OutSignalLevel=-15

InSignalLevel=-74

InfoActivity=1

ERLLevel=30

EchoCancellerMaxReflector=46

SessionTarget=

ImgPages=0

Telephony call-legs: 1

Total call-legs: 2


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Chris Deren Thu, 03/30/2006 - 06:38
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Actually in your example the ERLlevel is 59 dB, you calculate the ERLlevel with the following formula

ERLlevel=OutSignalLevel-InSignalLevel = -15- -74=59. If it is only happening occasionally, and as you probably know echo comes from the analog side, perhaps it is the remote side issue.


Chris

francis.labelle... Thu, 03/30/2006 - 19:45
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I got the same problem, look at the bug CSCsd54344.


And then ask to TAC to send you the dspware for dsp 7.3.0.


That's fix my problem.


Another thing, if you are looking at the jitter delay in a CDR report, you will also see the you have a weird jitter value, don't worry, look at bug CSCsd44903.


P.S. I'm using a 2811 router with a PRI in MGCP.

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