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Beginner

Very Long Calls in PSTN

Hi,

Would like to ask some help on troubleshooting our issue with very long calls in pstn. This is happening over a year now. Our current Telco bills us for calls that lasted from 25 to 58 hours for each calls which for a normal point of view is impossible as we;re not a call center environment. They presented each call in the billing with caller ID as the BTN only. Our PRIs will need to be upgraded (additional costs) if we want to our calls to be filtered by the actual caller ID. We are suspecting calls are hanged on the gateway.

setup is:  CUCM > MGCP Gateway > ISDN Pri > Telco

We triple checked our CDR but no sign of calls more than 13 hours duration. this matches our max-call duration timer in the enterprise parameters.

I noticed the below logs on the gateway that seems to shows call that is more than 13 hours;

router#show call active voice

GENERIC:
SetupTime=28863887920 ms
Index=1
PeerAddress=
PeerSubAddress=
PeerId=0
PeerIfIndex=0
LogicalIfIndex=0
ConnectTime=28863887920 ms
CallDuration=14:09:05 sec
CallState=2
CallOrigin=1
ChargedUnits=0
InfoType=speech
TransmitPackets=2547255
TransmitBytes=407560800
ReceivePackets=42156
ReceiveBytes=6744960
VOIP:
ConnectionId[0xCC8812D6 0x706D11E2 0xB8796416 0x8D284420]
IncomingConnectionId[0xCC8812D6 0x706D11E2 0xB8796416 0x8D284420]
CallID=5075192
GlobalCallId=[0x0 0x0 0x0 0x0]
RemoteIPAddress=0.0.0.0
RemoteUDPPort=24584
RemoteSignallingIPAddress=0.0.0.0
RemoteSignallingPort=0
RemoteMediaIPAddress=10.99.58.140
RemoteMediaPort=24584
RoundTripDelay=0 ms
SelectedQoS=best-effort
tx_DtmfRelay=out-of-band
FastConnect=FALSE

AnnexE=FALSE

Separate H245 Connection=FALSE

H245 Tunneling=FALSE

SessionProtocol=other
ProtocolCallId=D000000002623eb6000000F500004439
SessionTarget=
OnTimeRvPlayout=842130
GapFillWithSilence=40 ms
GapFillWithPrediction=2440 ms
GapFillWithInterpolation=0 ms
GapFillWithRedundancy=0 ms
HiWaterPlayoutDelay=205 ms
LoWaterPlayoutDelay=55 ms
TxPakNumber=2547109
TxSignalPak=0
TxComfortNoisePak=0
TxDuration=50942190
TxVoiceDuration=50942190
RxPakNumber=42153
RxSignalPak=0
RxComfortNoisePak=0
RxDuration=50941140
RxVoiceDuration=842130
RxOutOfSeq=15
RxLatePak=36
RxEarlyPak=6
RxBadProtocol=0
PlayDelayCurrent=65
PlayDelayMin=55
PlayDelayMax=205
PlayDelayClockOffset=994457036
PlayDelayJitter=374
PlayErrPredictive=2440
PlayErrInterpolative=0
PlayErrSilence=40
PlayErrBufferOverFlow=340
PlayErrRetroactive=2
PlayErrTalkspurt=4
ClockAdjustDuration=20
EarlyPacketDuration=100
LateDiscardDuration=590
SilenceDiscardDuration=1520
JBuffDecreaseDuration=1880
JBuffIncreaseDuration=1880
OutSignalLevel=-65
InSignalLevel=-66
LevelTxPowerMean=0
LevelRxPowerMean=0
LevelBgNoise=-67
ERLLevel=45
ACOMLevel=45
ErrRxDrop=0
ErrTxDrop=0
ErrTxControl=0
ErrRxControl=0
PlayoutMode = undefined
PlayoutInitialDelay=0 ms
ReceiveDelay=65 ms
LostPackets=564
EarlyPackets=6
LatePackets=36
SRTP = off
TextRelay = off
VAD = disabled
CoderTypeRate=g711ulaw
CodecBytes=160
Media Setting=flow-around
CallerName=
CallerIDBlocked=False
OriginalCallingNumber=
OriginalCallingOctet=0x0
OriginalCalledNumber=
OriginalCalledOctet=0x0
OriginalRedirectCalledNumber=
OriginalRedirectCalledOctet=0x0
TranslatedCallingNumber=
TranslatedCallingOctet=0x0
TranslatedCalledNumber=
TranslatedCalledOctet=0x0
TranslatedRedirectCalledNumber=
TranslatedRedirectCalledOctet=0x0
MediaInactiveDetected=no
MediaInactiveTimestamp=
MediaControlReceived=
LongDurationCallDetected=no
LongDurCallTimestamp=
LongDurcallDuration=
Username=
MlppServiceDomain=0 (NO_MLPP_DOMAIN)
PrecedenceLevel=0 (PRECEDENCE_LEVEL_NONE)

router#show call active voice brief

Telephony call-legs: 13
SIP call-legs: 0
H323 call-legs: 0
Call agent controlled call-legs: 13
SCCP call-legs: 0
Multicast call-legs: 0
Total call-legs: 26
A5B  : 5075192 -1200883152ms.1 +0 pid:0 Originate  connecting
dur 12:46:09 tx:2298451/367752160 rx:42156/6744960
IP 10.99.58.140:24584 SRTP: off rtt:0ms pl:842130/2480ms lost:564/6/36 delay:65/55/205ms g711ulaw TextRelay: off
media inactive detected:n media contrl rcvd:n/a timestamp:n/a
long duration call detected:n long duration call duration:n/a timestamp:n/a

A5B  : 5075191 -1200883152ms.2 +0 pid:0 Originate  active
dur 12:46:09 tx:42156/7082208 rx:2298503/367760480
Tele 0/0/0:15 (5075191) [0/0/0.24] tx:45970060/45970060/0ms g711ulaw noise:-68 acom:45  i/0:-67/-67 dBm

router#sh call active voice compact duration more 3000
<callID>  A/O FAX T<sec> Codec       type        Peer Address       IP R<ip>:<udp>
Total call-legs: 24
   5075192 ORG     T44852 g711ulaw    VOIP        P     10.99.58.140:24584
   5075191 ORG     T44852 g711ulaw    TELE        P

router#show voice call stat
us

0x4D70F7   A5B 0x6822D220 0/0/0:15.24      0/4:1  *           g711ulaw       0/0

===================================================================

However when I checked this in CUCM CDR dump, search by IP in order to identify the Phone, calls only shows max of 12 minutes for this call

dateTimeConnectdateTimeDisconnectorigIpv4v6Addr
2/7/13 8:33 AM2/7/13 8:45 AM10.99.58.140

Any ideas?

thanks in advance...

3 REPLIES 3
Hall of Fame Master

Very Long Calls in PSTN

The inaccuracy can be due to using MGCP, that is a buggy and unreliable protocol. You switch to H.323, or update and play around with configuration.

Howver, even telco has responsability, because when a call is hang up on the other side, it disconnects on you PRI side too, no matter the protocol being used.

Highlighted
Beginner

Very Long Calls in PSTN

Thanks Paolo, Appreciate your response as i'm really out of idea right now..i've been trying to find out how to nail down the root cause plus the pressure of charges we're going to pay... i couldn't hope less   been a month pushing our Telco to investigate but seems no luck..

Hall of Fame Master

Re: Very Long Calls in PSTN

Yes, telcos doesn't really care about these cases. even if it is agaisnt any logic, you can pay, or pay.

They may change attitude with a laywer's letter.

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