We are having issues with voice on our network. We have a Pico MiniCMTS200a and the MTA's are connected to a Metaswitch. We only use Arris MTA's and primarily use TM822G's and TM(4-6)02G's. Users are complaining about "static" and this is among several. It comes and goes and we also have frequent issues where we get a SIP 480 response from the MTA. Below is 2 calls to one of the MTA's that had the issue, from the VQM page of the modem. Ask any questions to clarify. Any suggestions to try would be helpful. Also, we are running 9.1.103S.SIP and DQOS is off in the feature switch.
Call Start Time: Tue Feb 16 18:19:07 2016
Call Duration: 0h 2m 21s
Line Number: 2
Remote IP Address: 10.22.125.6
CW Errors: -7
CW Error Rate: 0.00e+00
SNR: -39.9 dB
MicroReflections: 41 dBc
Downstream Power: -0.8 dBmV
Upstream Power: 34.0 dBmV
EQI Average: 0.804
EQI Minimum: 0.167
EQI Maximum: 0.833
EQI Instantaneous: 0.648
MOS-LQ: 4.0
MOS-CQ: 3.9
Echo Return Loss: 66 dB
Signal Level: -20 dBm0
Noise Level: -84 dBm0
Loss Rate: 0 %
Pkt Loss Concealment:Standard
Discard Rate: 0 %
Burst Density: 0 %
Gap Density: 0 %
Burst Duration: 0 ms
Gap Duration: 65+ seconds
Round Trip Delay: 0 ms
End System Delay: 97 ms
Gmin: 16 packets
R Factor: 84
External R Factor: 0
Jitter Buf Adaptive: Adaptive
Jitter Buf Rate: 15
JB Nominal Delay: 34 ms
JB Max Delay: 34 ms
JB Abs. Max Delay: 120 ms
Remote MOS-LQ: No Remote Data
Remote MOS-CQ: No Remote Data
Remote Echo Return Loss: No Remote Data
Remote Signal Level: No Remote Data
Remote Noise Level: No Remote Data
Remote Loss Rate: No Remote Data
Remote Pkt Loss Concealment:No Remote Data
Remote Discard Rate: No Remote Data
Remote Burst Density: No Remote Data
Remote Gap Density: No Remote Data
Remote Burst Duration: No Remote Data
Remote Gap Duration: No Remote Data
Remote Round Trip Delay: No Remote Data
Remote End System Delay: No Remote Data
Remote Gmin: No Remote Data
Remote R Factor: No Remote Data
Remote External R Factor: No Remote Data
Remote Jitter Buf Adaptive: No Remote Data
Remote Jitter Buf Rate: No Remote Data
Remote JB Nominal Delay: No Remote Data
Remote JB Max Delay: No Remote Data
Remote JB Abs. Max Delay: No Remote Data
Tx Packets: 6614
Tx Octets: 529120
Rx Packets: 6607
Rx Octets: 528560
Packet Loss: 5
Interval Jitter: 0 ms
Originator: no
Remote Interval Jitter: No Remote Data
txcodec: G726-32
rxcodec: G726-32
Call 2: Call End Time: Tue Feb 16 18:02:52 2016
Call Start Time: Tue Feb 16 18:01:34 2016
Call Duration: 0h 1m 18s
Line Number: 2
Remote IP Address: 10.22.125.6
CW Errors: -1
CW Error Rate: 0.00e+00
SNR: -39.9 dB
MicroReflections: 41 dBc
Downstream Power: -0.8 dBmV
Upstream Power: 34.0 dBmV
EQI Average: 0.766
EQI Minimum: 0.167
EQI Maximum: 0.833
EQI Instantaneous: 0.833
MOS-LQ: 4.1
MOS-CQ: 4.1
Echo Return Loss: 67 dB
Signal Level: -17 dBm0
Noise Level: -64 dBm0
Loss Rate: 0 %
Pkt Loss Concealment:Standard
Discard Rate: 0 %
Burst Density: 0 %
Gap Density: 0 %
Burst Duration: 0 ms
Gap Duration: 65+ seconds
Round Trip Delay: 0 ms
End System Delay: 97 ms
Gmin: 16 packets
R Factor: 92
External R Factor: 0
Jitter Buf Adaptive: Adaptive
Jitter Buf Rate: 15
JB Nominal Delay: 29 ms
JB Max Delay: 38 ms
JB Abs. Max Delay: 120 ms
Remote MOS-LQ: No Remote Data
Remote MOS-CQ: No Remote Data
Remote Echo Return Loss: No Remote Data
Remote Signal Level: No Remote Data
Remote Noise Level: No Remote Data
Remote Loss Rate: No Remote Data
Remote Pkt Loss Concealment:No Remote Data
Remote Discard Rate: No Remote Data
Remote Burst Density: No Remote Data
Remote Gap Density: No Remote Data
Remote Burst Duration: No Remote Data
Remote Gap Duration: No Remote Data
Remote Round Trip Delay: No Remote Data
Remote End System Delay: No Remote Data
Remote Gmin: No Remote Data
Remote R Factor: No Remote Data
Remote External R Factor: No Remote Data
Remote Jitter Buf Adaptive: No Remote Data
Remote Jitter Buf Rate: No Remote Data
Remote JB Nominal Delay: No Remote Data
Remote JB Max Delay: No Remote Data
Remote JB Abs. Max Delay: No Remote Data
Tx Packets: 3674
Tx Octets: 587840
Rx Packets: 3673
Rx Octets: 587680
Packet Loss: 3
Interval Jitter: 0 ms
Originator: yes
Remote Interval Jitter: No Remote Data
txcodec: PCMU
rxcodec: PCMU
the first thing that jumps out at me is
Upstream Power: 34.0 dBmV --- whats your upstream SNR? Has to be checked at cmts...
with such a low upstream this mta is very susceptible to ingress type noise, unless your return is super flat with a low noise floor 34 db on the return is probably not going to work very well especially with voip.
typically cable plant is designed so that signal from the CMTS/Edge QAM reaches the customer at 0 dBmv and the signal from the customer transmitted at 40-50 dB (we use 45 dB) reaches the CMTS at 0 dB. Your signal of -.8 db should correlate to a 44 dB or so on the return but you have a 35 db, this indicates to me a balance issue.
I would pay very close attention to the the return SNR (from the cmts) and the amount of codewords that are corrected or uncorrectable at the cmts, both indicating return path problems.
We are still working on balancing the plant. The SNR is right around 30-32.
If your DQOS is off, what voice classifiers/flows have you setup in the CM config file?
NetworkAccess = 1
SnmpMib = arrisCmDevHttpWanAccess.0 advanced
SnmpMib = arrisMtaDevProvMethodIndicator.0 gupiMacMta
SnmpMib = docsDevNmAccessIp.1 0.0.0.0
SnmpMib = docsDevNmAccessIpMask.1 0.0.0.0
SnmpMib = docsDevNmAccessCommunity.1 "C11H17N2O2SNa"
SnmpMib = docsDevNmAccessControl.1 readWrite
SnmpMib = docsDevNmAccessStatus.1 createAndGo
SnmpMib = pktcMtaDevEnabled.0 true
SnmpMib = ppCfgMtaCallpFeatureSwitch.0 hexstr: 00.01.96.33
SnmpMib = docsDevNmAccessIp.3 0.0.0.0
SnmpMib = docsDevNmAccessIpMask.3 0.0.0.0
SnmpMib = docsDevNmAccessCommunity.3 "C11H17N2O2SNa"
SnmpMib = docsDevNmAccessControl.3 readWrite
SnmpMib = docsDevNmAccessInterfaces.3 hexstr: 40
SnmpMib = docsDevNmAccessStatus.3 createAndGo
BaselinePrivacy =
AuthorizeWaitTimeout = 10
ReauthorizeWaitTimeout = 10
KekGraceTime = 600
OpWaitTimeout = 10
RekeyWaitTimeout = 10
TekGraceTime = 600
AuthorizeRejectWaitTimeout = 60
SAMapWaitTimeout = 1
SAMapMaxRetries = 4
ManufacturerCVC = hexstr: 30.82.03.A6.30.82.02.8E.A0.03.02.01.02.02.10.6C.09.43.EC.39.87.2D.8F.EC.DA.6C.48.9E.5E.90.30.30.0D.06.09.2A.86.48.86.F7.0D.01.01.05.05.00.30.81.97.31.0B.30.09.06.03.55.04.06.13.02.55.53.31.39.30.37.06.03.55.04.0A.13.30.44.61.74.61.20.4F.76.65.72.20.43.61.62.6C.65.20.53.65.72.76.69.63.65.20.49.6E.74.65.72.66.61.63.65.20.53.70.65.63.69.66.69.63.61.74.69.6F.6E.73.31.15.30.13.06.03.55.04.0B.13.0C.43.61.62.6C.65.20.4D.6F.64.65.6D.73.31.36.30.34.06.03.55.04.03.13.2D.44.4F.43.53.49.53.20.43.61.62.6C.65.20.4D.6F.64.65.6D.20.52.6F.6F.74.20.43.65.72.74.69.66.69.63.61.74.65.20.41.75.74.68.6F.72.69.74.79.30.1E.17.0D.30.31.30.39.31.32.30.30.30.30.30.30.5A.17.0D.31.33.30.39.31.31.32.33.35.39.35.39.5A.30.6A.31.0B.30.09.06.03.55.04.06.13.02.55.53.31.22.30.20.06.03.55.04.0A.13.19.41.72.72.69.73.20.49.6E.74.65.72.61.63.74.69.76.65.2C.20.4C.2E.4C.2E.43.2E.31.0F.30.0D.06.03.55.04.0B.13.06.44.4F.43.53.49.53.31.26.30.24.06.03.55.04.03.13.1D.43.6F.64.65.20.56.65.72.69.66.69.63.61.74.69.6F.6E.20.43.65.72.74.69.66.69.63.61.74.65.30.82.01.22.30.0D.06.09.2A.86.48.86.F7.0D.01.01.01.05.00.03.82.01.0F.00.30.82.01.0A.02.82.01.01.00.D4.0C.5A.EA.CF.D1.E9.AB.5F.9E.50.88.CA.83.5E.EB.48.73.69.85.2C.CD.9A.92.E2.F7.FD.E9.B2.8C.AA.CA.21.18.9C.0B.69.6C.E1.F2.66.6C.0B.C8.C7.18.38.77.CE.51.9E.52.70.30.DA.F8.43.75.38.EC.12.CA.A4.49.22.47.23.97.F5.25.9E.06.71.31.D0.46.F6.7B.1E.2B.25.EF.37.B4.43.B8.9D.3F.86.DB.66.55.25.25.95.C4.27.A6.D6.41.DB.7B.39.2E.8E.01.D7.BB.DF.73.D2.13.8A.85.55.37.47.D6.C0.68.5F.76.BC.80.C8.2E.75.5F.8A.CC.87.C6.56.50.A1.49.2F.14.B4.8C.97.A8.06.32.79.49.C5.FA.AA.43.8A.C5.F0.A9.76.47.4F.D2.6C.DE.45.56.D5.2B.FA.5D.C7.50.8F.A7.F1.50.FA.45.4C.68.1F.51.08.08.52.96.F2.C9.4C.37.1B.57.CD.19.3E.89.39.D6.26.8C.8C.D9.6E.3E.8A.06.CA.BA.6D.5C.B8.29.89.C1.75.1E.21.E7.7F.09.CA.73.DA.4D.AA.1F.DE.5B.C6.8B.ED.4B.8E.B5.B0.EA.3A.BB.23.D4.24.97.90.B2.A0.93.DD.E0.80.65.73.13.8C.BB.99.FD.CE.B6.FF.C1.02.03.01.00.01.A3.1A.30.18.30.16.06.03.55.1D.25.01.01.FF.04.0C.30.0A.06.08.2B.06.01.05.05.07.03.03.30.0D.06.09.2A.86.48.86.F7.0D.01.01.05.05.00.03.82.01.01.00.94.F2.71.A8.BB.BA.C1.D7.FC.05.42.60.17.0B.59.F0.B6.AC.9D.A7.0D.01.48.69.9E.0D.24.0B.03.3D.9C.34.91.8F.77.37.CD.45.B8.22.ED.F9.E1.BE.C4.C5.B0.30.D8.78.B6.37.8B.5A.79.95.D0.32.E9.33.EC.0A.E0.DB.43.6A.3F.52.18.1F.FE.E0.8E.0C.D4.F6.20.1F.11.15.0F.4C.F1.BE.F4.1C.9C.58.EF.16.65.82.B5.E7.F1.AA.1A.FC.D7.BA.DE.B7.B0.09.78.45.C2.D9.5E.E8.9F.66.76.7F.3B.C0.80.C2.99.4E.8C.39.CA.9F.22.BC.C2.21.51.BA.92.21.B7.CA.87.E8.1F.DA.D3.FC.F4.8F.EB.61.C7.39.EC.75.1A.C0.0A.FA.CD.88.CC.C9.9D.11.EE.6A.96.C5.A5.91.F6.25.87.5E.D7.AF.60.46.0E.73.30.DE.E0.5E.C1.83.D1.71.7A.F3.F2.70.2D.F0.25.3F.D1.A4.9C.BC.A6.A6.54.B3.7C.B7.84.6F.91.C1.1E.3A.83.D1.E6.8C.28.AA.25.A3.5D.98.49.39.3B.00.9B.9A.53.28.E5.72.90.17.D3.5B.B8.41.D6.2F.95.00.07.BA.7D.73.E2.FF.F4.E1.4D.0F.3A.49.19.38.05.49.57.14.81.1B
MaxCpeAllowed = 2
UpstreamPacketClassification =
PcReference = 2
PcServiceFlowReference = 2
PcActivationState = 1
PcIpClassification =
PcIpProtocol = 256
PcIpSourcePortStart = 5060
PcIpSourcePortEnd = 5060
PcIpDestPortStart = 5060
PcIpDestPortEnd = 5060
DownstreamPacketClassification =
PcReference = 102
PcServiceFlowReference = 102
PcActivationState = 1
PcIpClassification =
PcIpProtocol = 256
PcIpSourcePortStart = 5060
PcIpSourcePortEnd = 5060
PcIpDestPortStart = 5060
PcIpDestPortEnd = 5060
UpstreamServiceFlow =
SfReference = 11
SfQosSetType = 7
SfTrafficPriority = 1
SfMaxTrafficRate = 5120000
UpstreamServiceFlow =
SfReference = 2
SfQosSetType = 7
SfTrafficPriority = 5
SfMaxTrafficRate = 100000
SfSchedulingType = 2
DownstreamServiceFlow =
SfReference = 12
SfQosSetType = 7
SfTrafficPriority = 5
SfMaxTrafficRate = 25600000
SfMaxTrafficBurst = 65536
DownstreamServiceFlow =
SfReference = 102
SfQosSetType = 7
SfTrafficPriority = 5
SfMaxTrafficRate = 100000
MaxClassifiers = 20
PrivacyEnable = 1
Enable2.0Mode = 1
EnableTestModes = 0
So it looks like you are putting SIP signalling into 100k down (prio 5) / 100k up (prio 5) flows
Everything else (internet and voice audio) is going into the default 5M down (prio 5) / 2M up (prio 1) flows
Did you expect the voice audio to go into that 100/100 flow ? The current config won't do that.
At the moment, I reckon the customer's internet traffic is going to stomp on the audio.
If you don't want to / can't use DQOS, then you will need to improve your classifiers to match the audio traffic better.
For example if the MTA audio all goes to a voice server, setup your classifier to match on the voice audio server IP.
Set the voice traffic flows to high prio like 5.
Set the internet traffic / default service flows to a lower prio like 1.
Also that CM config file looks a bit strange for Arris GUPI MAC provisioning
These ones should go in the MTA config file :
SnmpMib = pktcMtaDevEnabled.0 true
SnmpMib = ppCfgMtaCallpFeatureSwitch.0 hexstr: 00.01.96.33
Also please note that GUPI MAC MTA method is insecure, and I wouldn't recommend it for production use
You could instead use GUP MAC Encrypted MTA method
More info here :
http://www.docsis.org/comment/3063#comment-3063