OpenBTS mobile stations loose network connection












0















Initial setup



OpenBTS installed on Ubuntu 16.04, two mobile phones connected to the OpenBTS network. SIM are successfully registered on sipauthserve. Transceiver: USRP X310, USRP N210.



Problem



In turn, the phones loose connection to the network for some seconds. If GPRS is not enabled in OpenBTS configuration, this issue almost never happen.



If i initiate a call from a phone while it is in "no-network moment", the OpenBTS server does not receive anything. Dial error is displayed on the phone.



If a phone that is in "no-network moment" is called by a working phone, the call fails. Asterisk log return:




Jan 15 16:25:50 bar asterisk[3702]: VERBOSE[5036][C-00000028]: pbx.c:4898 in pbx_extension_helper: -- Executing [h@phones:1] Log("SIP/00101100010-0000004c", "NOTICE,A-Number=1387 A-Name= A-IMSI=IMSI222016703294271 B-Number=973742 B-Name= B-IMSI=IMSI222992311440168 hangupcause=27 dialstatus=CONGESTION hangupdirection=SYSTEM duration=13 billsec=0") in new stack




This is the OpenBTS configuration:




OpenBTS> devconfig
CLI.Interface 127.0.0.1 [default]
CLI.Port 49300 [default]
Control.CDR.Dirname (disabled) [default]
Control.Call.QueryRRLP.Early 0 [default]
Control.Call.QueryRRLP.Late 0 [default]
Control.GSMTAP.GPRS 1
Control.GSMTAP.GSM 1
Control.GSMTAP.TargetIP 127.0.0.1 [default]
Control.LUR.404RejectCause 0x04 [default]
Control.LUR.AttachDetach 1 [default]
Control.LUR.FailMode ACCEPT [default]
Control.LUR.FailedRegistration.Message Your handset is not provisioned for this network. [default]
Control.LUR.FailedRegistration.ShortCode 1000 [default]
Control.LUR.NormalRegistration.Message (disabled) [default]
Control.LUR.NormalRegistration.ShortCode 0000 [default]
Control.LUR.OpenRegistration (disabled) [default]
Control.LUR.OpenRegistration.Message Welcome to the test network. Your IMSI is [default]
Control.LUR.OpenRegistration.Reject (disabled) [default]
Control.LUR.OpenRegistration.ShortCode 101 [default]
Control.LUR.QueryClassmark 0 [default]
Control.LUR.QueryIMEI 0 [default]
Control.LUR.QueryRRLP 0 [default]
Control.LUR.RegistrationMessageFrequency FIRST [default]
Control.LUR.SendTMSIs 1
Control.LUR.TestMode 0 [default]
Control.LUR.UnprovisionedRejectCause 0x04 [default]
Control.NumSQLTries 3 [default]
Control.Reporting.PhysStatusTable /var/run/ChannelTable.db [default]
Control.Reporting.StatsTable /var/log/OpenBTSStats.db [default]
Control.Reporting.TMSITable /var/run/TMSITable.db [default]
Control.Reporting.TransactionMaxCompletedRecords 100 [default]
Control.Reporting.TransactionTable /var/run/TransactionTable.db [default]
Control.SACCHTimeout.BumpDown 1 [default]
Control.SMS.QueryRRLP 0 [default]
Control.SMSCB.Table (disabled) [default]
Control.TMSITable.MaxAge 576 [default]
Control.VEA 0 [default]
Control.WatchdogMinutes 0 [default]
Core.File core.openbts [default]
Core.Pid 0 [default]
Core.SaveFiles 1 [default]
Core.TarFile /tmp/openbtsfiles.tgz [default]
GGSN.DNS 8.8.8.8
GGSN.Firewall.Enable 0
GGSN.IP.MaxPacketSize 1520 [default]
GGSN.IP.ReuseTimeout 180 [default]
GGSN.IP.TossDuplicatePackets 0 [default]
GGSN.Logfile.Name /tmp/GGSN.log
GGSN.MS.IP.Base 192.168.99.1 [default]
GGSN.MS.IP.MaxCount 254 [default]
GGSN.MS.IP.Route (disabled) [default]
GGSN.ShellScript (disabled) [default]
GGSN.TunName sgsntun [default]
GPRS.CellOptions.T3168Code 5 [default]
GPRS.CellOptions.T3192Code 0 [default]
GPRS.ChannelCodingControl.RSSI -40 [default]
GPRS.Channels.Congestion.Threshold 200 [default]
GPRS.Channels.Congestion.Timer 60 [default]
GPRS.Channels.Min.C0 2 [default]
GPRS.Channels.Min.CN 0 [default]
GPRS.Codecs.Downlink 1,4 [default]
GPRS.Codecs.Uplink 1,4 [default]
GPRS.Counters.Assign 10 [default]
GPRS.Counters.N3101 20 [default]
GPRS.Counters.N3103 8 [default]
GPRS.Counters.N3105 12 [default]
GPRS.Counters.Reassign 6 [default]
GPRS.Counters.TbfRelease 5 [default]
GPRS.Debug 0 [default]
GPRS.Downlink.KeepAlive 300 [default]
GPRS.Downlink.Persist 0 [default]
GPRS.Enable 0 [default]
GPRS.LocalTLLI.Enable 1 [default]
GPRS.MS.KeepExpiredCount 20 [default]
GPRS.MS.Power.Alpha 10 [default]
GPRS.MS.Power.Gamma 31 [default]
GPRS.MS.Power.T_AVG_T 15 [default]
GPRS.MS.Power.T_AVG_W 15 [default]
GPRS.Multislot.Max.Downlink 3 [default]
GPRS.Multislot.Max.Uplink 2 [default]
GPRS.NC.NetworkControlOrder 2 [default]
GPRS.NMO 2 [default]
GPRS.PRIORITY-ACCESS-THR 6 [default]
GPRS.RAC 0 [default]
GPRS.RA_COLOUR 0 [default]
GPRS.RRBP.Min 0 [default]
GPRS.Reassign.Enable 1 [default]
GPRS.SendIdleFrames 0 [default]
GPRS.TBF.Downlink.Poll1 10 [default]
GPRS.TBF.EST 1 [default]
GPRS.TBF.Expire 30000 [default]
GPRS.TBF.KeepExpiredCount 20 [default]
GPRS.TBF.Retry 1 [default]
GPRS.Timers.Channels.Idle 6000 [default]
GPRS.Timers.MS.Idle 600 [default]
GPRS.Timers.MS.NonResponsive 6000 [default]
GPRS.Timers.T3169 5000 [default]
GPRS.Timers.T3191 5000 [default]
GPRS.Timers.T3193 0 [default]
GPRS.Timers.T3195 5000 [default]
GPRS.Uplink.KeepAlive 300 [default]
GPRS.Uplink.Persist 4000 [default]
GPRS.advanceblocks 10 [default]
GSM.BTS.RADIO_LINK_TIMEOUT 15 [default]
GSM.CCCH.BS_AG_BLKS_RES auto [default]
GSM.CCCH.BS_PA_MFRMS 2 [default]
GSM.CCCH.CCCH-CONF 1 [default]
GSM.CallerID.Source auto [default]
GSM.CellOptions.RADIO-LINK-TIMEOUT 15 [default]
GSM.CellSelection.CELL-RESELECT-HYSTERESIS 3 [default]
GSM.CellSelection.MS-TXPWR-MAX-CCH 0 [default]
GSM.CellSelection.NCCsPermitted 0 [default]
GSM.CellSelection.NECI 1 [default]
GSM.CellSelection.RXLEV-ACCESS-MIN 0 [default]
GSM.Channels.C1sFirst 0 [default]
GSM.Channels.NumC1s auto [default]
GSM.Channels.NumC7s auto [default]
GSM.Channels.SDCCHReserve 0 [default]
GSM.Cipher.CCHBER 0 [default]
GSM.Cipher.Encrypt 0 [default]
GSM.Cipher.RandomNeighbor 0 [default]
GSM.Cipher.ScrambleFiller 0 [default]
GSM.Control.GPRSMaxIgnore 5 [default]
GSM.Handover.FailureHoldoff 20 [default]
GSM.Handover.History.Max 32 [default]
GSM.Handover.Margin 15 [default]
GSM.Handover.Ny1 50 [default]
GSM.Handover.RXLEV_DL.History 6 [default]
GSM.Handover.RXLEV_DL.Margin 10 [default]
GSM.Handover.RXLEV_DL.PenaltyTime 20 [default]
GSM.Handover.RXLEV_DL.Target 60 [default]
GSM.Identity.BSIC.BCC 2 [default]
GSM.Identity.BSIC.NCC 0 [default]
GSM.Identity.CI 10 [default]
GSM.Identity.LAC 1000 [default]
GSM.Identity.MCC 001 [default]
GSM.Identity.MNC 01 [default]
GSM.Identity.ShortName MyNET
GSM.MS.Power.Damping 75 [default]
GSM.MS.Power.Max 33 [default]
GSM.MS.Power.Min 5 [default]
GSM.MS.TA.Damping 50 [default]
GSM.MS.TA.Max 62 [default]
GSM.MaxSpeechLatency 2 [default]
GSM.Neighbors (disabled) [default]
GSM.Neighbors.NumToSend 31 [default]
GSM.RACH.AC 0x0400 [default]
GSM.RACH.MaxRetrans 1 [default]
GSM.RACH.TxInteger 14 [default]
GSM.RRLP.ACCURACY 40 [default]
GSM.RRLP.ALMANAC.ASSIST.PRESENT 0 [default]
GSM.RRLP.ALMANAC.REFRESH.TIME 24.0 [default]
GSM.RRLP.ALMANAC.URL http://www.navcen.uscg.gov/?pageName=currentAlmanac&format=yuma [default]
GSM.RRLP.EPHEMERIS.ASSIST.COUNT 9 [default]
GSM.RRLP.EPHEMERIS.REFRESH.TIME 1.0 [default]
GSM.RRLP.EPHEMERIS.URL ftp://ftp.trimble.com/pub/eph/CurRnxN.nav [default]
GSM.RRLP.RESPONSETIME 4 [default]
GSM.RRLP.SEED.ALTITUDE 0 [default]
GSM.RRLP.SEED.LATITUDE 37.777423 [default]
GSM.RRLP.SEED.LONGITUDE -122.39807 [default]
GSM.RRLP.SERVER.URL (disabled) [default]
GSM.Radio.ARFCNs 1 [default]
GSM.Radio.Band 900 [default]
GSM.Radio.C0 51 [default]
GSM.Radio.MaxExpectedDelaySpread 4 [default]
GSM.Radio.NeedBSIC 0 [default]
GSM.Radio.PowerManager.MaxAttenDB 20
GSM.Radio.PowerManager.MinAttenDB 20
GSM.Radio.PowerManager.RampTime 60 [default]
GSM.Radio.RSSIAveragePeriod 8 [default]
GSM.Radio.RSSITarget -50 [default]
GSM.Radio.RxGain 10
GSM.Radio.SNRAveragePeriod 8 [default]
GSM.Radio.SNRTarget 10 [default]
GSM.ShowCountry 0 [default]
GSM.SpeechBuffer 1 [default]
GSM.Timer.Handover.Holdoff 10 [default]
GSM.Timer.T3103 12000 [default]
GSM.Timer.T3105 50 [default]
GSM.Timer.T3109 30000 [default]
GSM.Timer.T3113 10000 [default]
GSM.Timer.T3212 0 [default]
Log.Alarms.Max 20 [default]
Log.File (disabled) [default]
Log.Level NOTICE [default]
NodeManager.API.PhysicalStatus disabled [default]
NodeManager.Commands.Port 45060 [default]
NodeManager.Events.Port 45160 [default]
Peering.Neighbor.RefreshAge 60 [default]
Peering.NeighborTable.Path /var/run/NeighborTable.db [default]
Peering.Port 16001 [default]
Peering.ResendCount 20 [default]
Peering.ResendTimeout 100 [default]
RTP.Range 98 [default]
RTP.Start 16484 [default]
SGSN.Debug 0 [default]
SGSN.Timer.ImplicitDetach 3480 [default]
SGSN.Timer.MS.Idle 600 [default]
SGSN.Timer.RAUpdate 0 [default]
SGSN.Timer.Ready 44 [default]
SIP.DTMF.RFC2833 1 [default]
SIP.DTMF.RFC2833.PayloadType 101 [default]
SIP.DTMF.RFC2967 0 [default]
SIP.DTMF.RFC2976 0 [default]
SIP.Local.IP 127.0.0.1 [default]
SIP.Local.Port 5062 [default]
SIP.MaxForwards 70 [default]
SIP.Proxy.Mode (disabled) [default]
SIP.Proxy.Registration 127.0.0.1:5064 [default]
SIP.Proxy.SMS 127.0.0.1:5063 [default]
SIP.Proxy.Speech 127.0.0.1:5060 [default]
SIP.Proxy.USSD (disabled) [default]
SIP.RFC3428.NoTrying 0 [default]
SIP.Realm (disabled) [default]
SIP.RegistrationPeriod 90 [default]
SIP.SMSC smsc [default]
SIP.Timer.A 2000 [default]
SIP.Timer.B 10000 [default]
SIP.Timer.E 500 [default]
SIP.Timer.F 5000 [default]
SIP.Timer.H 5000 [default]
SMS.FakeSrcSMSC 0000 [default]
SMS.MIMEType application/vnd.3gpp.sms [default]
TRX.IP 127.0.0.1 [default]
TRX.MinimumRxRSSI -63
TRX.Port 5700 [default]
TRX.RadioFrequencyOffset 128 [default]
TRX.Timeout.Clock 10 [default]
TRX.Timeout.Start 2 [default]
TRX.TxAttenOffset 0 [default]
Test.GSM.SimulatedFER.Downlink 0 [default]
Test.GSM.SimulatedFER.Uplink 0 [default]
Test.GSM.UplinkFuzzingRate 0 [default]
Test.SIP.SimulatedPacketLoss 0 [default]




Any idea about what could be the cause? Thank you






connection ubuntu-16.04 mobile-phone gprs







share|improve this question





























    0















    Initial setup



    OpenBTS installed on Ubuntu 16.04, two mobile phones connected to the OpenBTS network. SIM are successfully registered on sipauthserve. Transceiver: USRP X310, USRP N210.



    Problem



    In turn, the phones loose connection to the network for some seconds. If GPRS is not enabled in OpenBTS configuration, this issue almost never happen.



    If i initiate a call from a phone while it is in "no-network moment", the OpenBTS server does not receive anything. Dial error is displayed on the phone.



    If a phone that is in "no-network moment" is called by a working phone, the call fails. Asterisk log return:




    Jan 15 16:25:50 bar asterisk[3702]: VERBOSE[5036][C-00000028]: pbx.c:4898 in pbx_extension_helper: -- Executing [h@phones:1] Log("SIP/00101100010-0000004c", "NOTICE,A-Number=1387 A-Name= A-IMSI=IMSI222016703294271 B-Number=973742 B-Name= B-IMSI=IMSI222992311440168 hangupcause=27 dialstatus=CONGESTION hangupdirection=SYSTEM duration=13 billsec=0") in new stack




    This is the OpenBTS configuration:




    OpenBTS> devconfig
    CLI.Interface 127.0.0.1 [default]
    CLI.Port 49300 [default]
    Control.CDR.Dirname (disabled) [default]
    Control.Call.QueryRRLP.Early 0 [default]
    Control.Call.QueryRRLP.Late 0 [default]
    Control.GSMTAP.GPRS 1
    Control.GSMTAP.GSM 1
    Control.GSMTAP.TargetIP 127.0.0.1 [default]
    Control.LUR.404RejectCause 0x04 [default]
    Control.LUR.AttachDetach 1 [default]
    Control.LUR.FailMode ACCEPT [default]
    Control.LUR.FailedRegistration.Message Your handset is not provisioned for this network. [default]
    Control.LUR.FailedRegistration.ShortCode 1000 [default]
    Control.LUR.NormalRegistration.Message (disabled) [default]
    Control.LUR.NormalRegistration.ShortCode 0000 [default]
    Control.LUR.OpenRegistration (disabled) [default]
    Control.LUR.OpenRegistration.Message Welcome to the test network. Your IMSI is [default]
    Control.LUR.OpenRegistration.Reject (disabled) [default]
    Control.LUR.OpenRegistration.ShortCode 101 [default]
    Control.LUR.QueryClassmark 0 [default]
    Control.LUR.QueryIMEI 0 [default]
    Control.LUR.QueryRRLP 0 [default]
    Control.LUR.RegistrationMessageFrequency FIRST [default]
    Control.LUR.SendTMSIs 1
    Control.LUR.TestMode 0 [default]
    Control.LUR.UnprovisionedRejectCause 0x04 [default]
    Control.NumSQLTries 3 [default]
    Control.Reporting.PhysStatusTable /var/run/ChannelTable.db [default]
    Control.Reporting.StatsTable /var/log/OpenBTSStats.db [default]
    Control.Reporting.TMSITable /var/run/TMSITable.db [default]
    Control.Reporting.TransactionMaxCompletedRecords 100 [default]
    Control.Reporting.TransactionTable /var/run/TransactionTable.db [default]
    Control.SACCHTimeout.BumpDown 1 [default]
    Control.SMS.QueryRRLP 0 [default]
    Control.SMSCB.Table (disabled) [default]
    Control.TMSITable.MaxAge 576 [default]
    Control.VEA 0 [default]
    Control.WatchdogMinutes 0 [default]
    Core.File core.openbts [default]
    Core.Pid 0 [default]
    Core.SaveFiles 1 [default]
    Core.TarFile /tmp/openbtsfiles.tgz [default]
    GGSN.DNS 8.8.8.8
    GGSN.Firewall.Enable 0
    GGSN.IP.MaxPacketSize 1520 [default]
    GGSN.IP.ReuseTimeout 180 [default]
    GGSN.IP.TossDuplicatePackets 0 [default]
    GGSN.Logfile.Name /tmp/GGSN.log
    GGSN.MS.IP.Base 192.168.99.1 [default]
    GGSN.MS.IP.MaxCount 254 [default]
    GGSN.MS.IP.Route (disabled) [default]
    GGSN.ShellScript (disabled) [default]
    GGSN.TunName sgsntun [default]
    GPRS.CellOptions.T3168Code 5 [default]
    GPRS.CellOptions.T3192Code 0 [default]
    GPRS.ChannelCodingControl.RSSI -40 [default]
    GPRS.Channels.Congestion.Threshold 200 [default]
    GPRS.Channels.Congestion.Timer 60 [default]
    GPRS.Channels.Min.C0 2 [default]
    GPRS.Channels.Min.CN 0 [default]
    GPRS.Codecs.Downlink 1,4 [default]
    GPRS.Codecs.Uplink 1,4 [default]
    GPRS.Counters.Assign 10 [default]
    GPRS.Counters.N3101 20 [default]
    GPRS.Counters.N3103 8 [default]
    GPRS.Counters.N3105 12 [default]
    GPRS.Counters.Reassign 6 [default]
    GPRS.Counters.TbfRelease 5 [default]
    GPRS.Debug 0 [default]
    GPRS.Downlink.KeepAlive 300 [default]
    GPRS.Downlink.Persist 0 [default]
    GPRS.Enable 0 [default]
    GPRS.LocalTLLI.Enable 1 [default]
    GPRS.MS.KeepExpiredCount 20 [default]
    GPRS.MS.Power.Alpha 10 [default]
    GPRS.MS.Power.Gamma 31 [default]
    GPRS.MS.Power.T_AVG_T 15 [default]
    GPRS.MS.Power.T_AVG_W 15 [default]
    GPRS.Multislot.Max.Downlink 3 [default]
    GPRS.Multislot.Max.Uplink 2 [default]
    GPRS.NC.NetworkControlOrder 2 [default]
    GPRS.NMO 2 [default]
    GPRS.PRIORITY-ACCESS-THR 6 [default]
    GPRS.RAC 0 [default]
    GPRS.RA_COLOUR 0 [default]
    GPRS.RRBP.Min 0 [default]
    GPRS.Reassign.Enable 1 [default]
    GPRS.SendIdleFrames 0 [default]
    GPRS.TBF.Downlink.Poll1 10 [default]
    GPRS.TBF.EST 1 [default]
    GPRS.TBF.Expire 30000 [default]
    GPRS.TBF.KeepExpiredCount 20 [default]
    GPRS.TBF.Retry 1 [default]
    GPRS.Timers.Channels.Idle 6000 [default]
    GPRS.Timers.MS.Idle 600 [default]
    GPRS.Timers.MS.NonResponsive 6000 [default]
    GPRS.Timers.T3169 5000 [default]
    GPRS.Timers.T3191 5000 [default]
    GPRS.Timers.T3193 0 [default]
    GPRS.Timers.T3195 5000 [default]
    GPRS.Uplink.KeepAlive 300 [default]
    GPRS.Uplink.Persist 4000 [default]
    GPRS.advanceblocks 10 [default]
    GSM.BTS.RADIO_LINK_TIMEOUT 15 [default]
    GSM.CCCH.BS_AG_BLKS_RES auto [default]
    GSM.CCCH.BS_PA_MFRMS 2 [default]
    GSM.CCCH.CCCH-CONF 1 [default]
    GSM.CallerID.Source auto [default]
    GSM.CellOptions.RADIO-LINK-TIMEOUT 15 [default]
    GSM.CellSelection.CELL-RESELECT-HYSTERESIS 3 [default]
    GSM.CellSelection.MS-TXPWR-MAX-CCH 0 [default]
    GSM.CellSelection.NCCsPermitted 0 [default]
    GSM.CellSelection.NECI 1 [default]
    GSM.CellSelection.RXLEV-ACCESS-MIN 0 [default]
    GSM.Channels.C1sFirst 0 [default]
    GSM.Channels.NumC1s auto [default]
    GSM.Channels.NumC7s auto [default]
    GSM.Channels.SDCCHReserve 0 [default]
    GSM.Cipher.CCHBER 0 [default]
    GSM.Cipher.Encrypt 0 [default]
    GSM.Cipher.RandomNeighbor 0 [default]
    GSM.Cipher.ScrambleFiller 0 [default]
    GSM.Control.GPRSMaxIgnore 5 [default]
    GSM.Handover.FailureHoldoff 20 [default]
    GSM.Handover.History.Max 32 [default]
    GSM.Handover.Margin 15 [default]
    GSM.Handover.Ny1 50 [default]
    GSM.Handover.RXLEV_DL.History 6 [default]
    GSM.Handover.RXLEV_DL.Margin 10 [default]
    GSM.Handover.RXLEV_DL.PenaltyTime 20 [default]
    GSM.Handover.RXLEV_DL.Target 60 [default]
    GSM.Identity.BSIC.BCC 2 [default]
    GSM.Identity.BSIC.NCC 0 [default]
    GSM.Identity.CI 10 [default]
    GSM.Identity.LAC 1000 [default]
    GSM.Identity.MCC 001 [default]
    GSM.Identity.MNC 01 [default]
    GSM.Identity.ShortName MyNET
    GSM.MS.Power.Damping 75 [default]
    GSM.MS.Power.Max 33 [default]
    GSM.MS.Power.Min 5 [default]
    GSM.MS.TA.Damping 50 [default]
    GSM.MS.TA.Max 62 [default]
    GSM.MaxSpeechLatency 2 [default]
    GSM.Neighbors (disabled) [default]
    GSM.Neighbors.NumToSend 31 [default]
    GSM.RACH.AC 0x0400 [default]
    GSM.RACH.MaxRetrans 1 [default]
    GSM.RACH.TxInteger 14 [default]
    GSM.RRLP.ACCURACY 40 [default]
    GSM.RRLP.ALMANAC.ASSIST.PRESENT 0 [default]
    GSM.RRLP.ALMANAC.REFRESH.TIME 24.0 [default]
    GSM.RRLP.ALMANAC.URL http://www.navcen.uscg.gov/?pageName=currentAlmanac&format=yuma [default]
    GSM.RRLP.EPHEMERIS.ASSIST.COUNT 9 [default]
    GSM.RRLP.EPHEMERIS.REFRESH.TIME 1.0 [default]
    GSM.RRLP.EPHEMERIS.URL ftp://ftp.trimble.com/pub/eph/CurRnxN.nav [default]
    GSM.RRLP.RESPONSETIME 4 [default]
    GSM.RRLP.SEED.ALTITUDE 0 [default]
    GSM.RRLP.SEED.LATITUDE 37.777423 [default]
    GSM.RRLP.SEED.LONGITUDE -122.39807 [default]
    GSM.RRLP.SERVER.URL (disabled) [default]
    GSM.Radio.ARFCNs 1 [default]
    GSM.Radio.Band 900 [default]
    GSM.Radio.C0 51 [default]
    GSM.Radio.MaxExpectedDelaySpread 4 [default]
    GSM.Radio.NeedBSIC 0 [default]
    GSM.Radio.PowerManager.MaxAttenDB 20
    GSM.Radio.PowerManager.MinAttenDB 20
    GSM.Radio.PowerManager.RampTime 60 [default]
    GSM.Radio.RSSIAveragePeriod 8 [default]
    GSM.Radio.RSSITarget -50 [default]
    GSM.Radio.RxGain 10
    GSM.Radio.SNRAveragePeriod 8 [default]
    GSM.Radio.SNRTarget 10 [default]
    GSM.ShowCountry 0 [default]
    GSM.SpeechBuffer 1 [default]
    GSM.Timer.Handover.Holdoff 10 [default]
    GSM.Timer.T3103 12000 [default]
    GSM.Timer.T3105 50 [default]
    GSM.Timer.T3109 30000 [default]
    GSM.Timer.T3113 10000 [default]
    GSM.Timer.T3212 0 [default]
    Log.Alarms.Max 20 [default]
    Log.File (disabled) [default]
    Log.Level NOTICE [default]
    NodeManager.API.PhysicalStatus disabled [default]
    NodeManager.Commands.Port 45060 [default]
    NodeManager.Events.Port 45160 [default]
    Peering.Neighbor.RefreshAge 60 [default]
    Peering.NeighborTable.Path /var/run/NeighborTable.db [default]
    Peering.Port 16001 [default]
    Peering.ResendCount 20 [default]
    Peering.ResendTimeout 100 [default]
    RTP.Range 98 [default]
    RTP.Start 16484 [default]
    SGSN.Debug 0 [default]
    SGSN.Timer.ImplicitDetach 3480 [default]
    SGSN.Timer.MS.Idle 600 [default]
    SGSN.Timer.RAUpdate 0 [default]
    SGSN.Timer.Ready 44 [default]
    SIP.DTMF.RFC2833 1 [default]
    SIP.DTMF.RFC2833.PayloadType 101 [default]
    SIP.DTMF.RFC2967 0 [default]
    SIP.DTMF.RFC2976 0 [default]
    SIP.Local.IP 127.0.0.1 [default]
    SIP.Local.Port 5062 [default]
    SIP.MaxForwards 70 [default]
    SIP.Proxy.Mode (disabled) [default]
    SIP.Proxy.Registration 127.0.0.1:5064 [default]
    SIP.Proxy.SMS 127.0.0.1:5063 [default]
    SIP.Proxy.Speech 127.0.0.1:5060 [default]
    SIP.Proxy.USSD (disabled) [default]
    SIP.RFC3428.NoTrying 0 [default]
    SIP.Realm (disabled) [default]
    SIP.RegistrationPeriod 90 [default]
    SIP.SMSC smsc [default]
    SIP.Timer.A 2000 [default]
    SIP.Timer.B 10000 [default]
    SIP.Timer.E 500 [default]
    SIP.Timer.F 5000 [default]
    SIP.Timer.H 5000 [default]
    SMS.FakeSrcSMSC 0000 [default]
    SMS.MIMEType application/vnd.3gpp.sms [default]
    TRX.IP 127.0.0.1 [default]
    TRX.MinimumRxRSSI -63
    TRX.Port 5700 [default]
    TRX.RadioFrequencyOffset 128 [default]
    TRX.Timeout.Clock 10 [default]
    TRX.Timeout.Start 2 [default]
    TRX.TxAttenOffset 0 [default]
    Test.GSM.SimulatedFER.Downlink 0 [default]
    Test.GSM.SimulatedFER.Uplink 0 [default]
    Test.GSM.UplinkFuzzingRate 0 [default]
    Test.SIP.SimulatedPacketLoss 0 [default]




    Any idea about what could be the cause? Thank you






    connection ubuntu-16.04 mobile-phone gprs







    share|improve this question



























      0












      0








      0








      Initial setup



      OpenBTS installed on Ubuntu 16.04, two mobile phones connected to the OpenBTS network. SIM are successfully registered on sipauthserve. Transceiver: USRP X310, USRP N210.



      Problem



      In turn, the phones loose connection to the network for some seconds. If GPRS is not enabled in OpenBTS configuration, this issue almost never happen.



      If i initiate a call from a phone while it is in "no-network moment", the OpenBTS server does not receive anything. Dial error is displayed on the phone.



      If a phone that is in "no-network moment" is called by a working phone, the call fails. Asterisk log return:




      Jan 15 16:25:50 bar asterisk[3702]: VERBOSE[5036][C-00000028]: pbx.c:4898 in pbx_extension_helper: -- Executing [h@phones:1] Log("SIP/00101100010-0000004c", "NOTICE,A-Number=1387 A-Name= A-IMSI=IMSI222016703294271 B-Number=973742 B-Name= B-IMSI=IMSI222992311440168 hangupcause=27 dialstatus=CONGESTION hangupdirection=SYSTEM duration=13 billsec=0") in new stack




      This is the OpenBTS configuration:




      OpenBTS> devconfig
      CLI.Interface 127.0.0.1 [default]
      CLI.Port 49300 [default]
      Control.CDR.Dirname (disabled) [default]
      Control.Call.QueryRRLP.Early 0 [default]
      Control.Call.QueryRRLP.Late 0 [default]
      Control.GSMTAP.GPRS 1
      Control.GSMTAP.GSM 1
      Control.GSMTAP.TargetIP 127.0.0.1 [default]
      Control.LUR.404RejectCause 0x04 [default]
      Control.LUR.AttachDetach 1 [default]
      Control.LUR.FailMode ACCEPT [default]
      Control.LUR.FailedRegistration.Message Your handset is not provisioned for this network. [default]
      Control.LUR.FailedRegistration.ShortCode 1000 [default]
      Control.LUR.NormalRegistration.Message (disabled) [default]
      Control.LUR.NormalRegistration.ShortCode 0000 [default]
      Control.LUR.OpenRegistration (disabled) [default]
      Control.LUR.OpenRegistration.Message Welcome to the test network. Your IMSI is [default]
      Control.LUR.OpenRegistration.Reject (disabled) [default]
      Control.LUR.OpenRegistration.ShortCode 101 [default]
      Control.LUR.QueryClassmark 0 [default]
      Control.LUR.QueryIMEI 0 [default]
      Control.LUR.QueryRRLP 0 [default]
      Control.LUR.RegistrationMessageFrequency FIRST [default]
      Control.LUR.SendTMSIs 1
      Control.LUR.TestMode 0 [default]
      Control.LUR.UnprovisionedRejectCause 0x04 [default]
      Control.NumSQLTries 3 [default]
      Control.Reporting.PhysStatusTable /var/run/ChannelTable.db [default]
      Control.Reporting.StatsTable /var/log/OpenBTSStats.db [default]
      Control.Reporting.TMSITable /var/run/TMSITable.db [default]
      Control.Reporting.TransactionMaxCompletedRecords 100 [default]
      Control.Reporting.TransactionTable /var/run/TransactionTable.db [default]
      Control.SACCHTimeout.BumpDown 1 [default]
      Control.SMS.QueryRRLP 0 [default]
      Control.SMSCB.Table (disabled) [default]
      Control.TMSITable.MaxAge 576 [default]
      Control.VEA 0 [default]
      Control.WatchdogMinutes 0 [default]
      Core.File core.openbts [default]
      Core.Pid 0 [default]
      Core.SaveFiles 1 [default]
      Core.TarFile /tmp/openbtsfiles.tgz [default]
      GGSN.DNS 8.8.8.8
      GGSN.Firewall.Enable 0
      GGSN.IP.MaxPacketSize 1520 [default]
      GGSN.IP.ReuseTimeout 180 [default]
      GGSN.IP.TossDuplicatePackets 0 [default]
      GGSN.Logfile.Name /tmp/GGSN.log
      GGSN.MS.IP.Base 192.168.99.1 [default]
      GGSN.MS.IP.MaxCount 254 [default]
      GGSN.MS.IP.Route (disabled) [default]
      GGSN.ShellScript (disabled) [default]
      GGSN.TunName sgsntun [default]
      GPRS.CellOptions.T3168Code 5 [default]
      GPRS.CellOptions.T3192Code 0 [default]
      GPRS.ChannelCodingControl.RSSI -40 [default]
      GPRS.Channels.Congestion.Threshold 200 [default]
      GPRS.Channels.Congestion.Timer 60 [default]
      GPRS.Channels.Min.C0 2 [default]
      GPRS.Channels.Min.CN 0 [default]
      GPRS.Codecs.Downlink 1,4 [default]
      GPRS.Codecs.Uplink 1,4 [default]
      GPRS.Counters.Assign 10 [default]
      GPRS.Counters.N3101 20 [default]
      GPRS.Counters.N3103 8 [default]
      GPRS.Counters.N3105 12 [default]
      GPRS.Counters.Reassign 6 [default]
      GPRS.Counters.TbfRelease 5 [default]
      GPRS.Debug 0 [default]
      GPRS.Downlink.KeepAlive 300 [default]
      GPRS.Downlink.Persist 0 [default]
      GPRS.Enable 0 [default]
      GPRS.LocalTLLI.Enable 1 [default]
      GPRS.MS.KeepExpiredCount 20 [default]
      GPRS.MS.Power.Alpha 10 [default]
      GPRS.MS.Power.Gamma 31 [default]
      GPRS.MS.Power.T_AVG_T 15 [default]
      GPRS.MS.Power.T_AVG_W 15 [default]
      GPRS.Multislot.Max.Downlink 3 [default]
      GPRS.Multislot.Max.Uplink 2 [default]
      GPRS.NC.NetworkControlOrder 2 [default]
      GPRS.NMO 2 [default]
      GPRS.PRIORITY-ACCESS-THR 6 [default]
      GPRS.RAC 0 [default]
      GPRS.RA_COLOUR 0 [default]
      GPRS.RRBP.Min 0 [default]
      GPRS.Reassign.Enable 1 [default]
      GPRS.SendIdleFrames 0 [default]
      GPRS.TBF.Downlink.Poll1 10 [default]
      GPRS.TBF.EST 1 [default]
      GPRS.TBF.Expire 30000 [default]
      GPRS.TBF.KeepExpiredCount 20 [default]
      GPRS.TBF.Retry 1 [default]
      GPRS.Timers.Channels.Idle 6000 [default]
      GPRS.Timers.MS.Idle 600 [default]
      GPRS.Timers.MS.NonResponsive 6000 [default]
      GPRS.Timers.T3169 5000 [default]
      GPRS.Timers.T3191 5000 [default]
      GPRS.Timers.T3193 0 [default]
      GPRS.Timers.T3195 5000 [default]
      GPRS.Uplink.KeepAlive 300 [default]
      GPRS.Uplink.Persist 4000 [default]
      GPRS.advanceblocks 10 [default]
      GSM.BTS.RADIO_LINK_TIMEOUT 15 [default]
      GSM.CCCH.BS_AG_BLKS_RES auto [default]
      GSM.CCCH.BS_PA_MFRMS 2 [default]
      GSM.CCCH.CCCH-CONF 1 [default]
      GSM.CallerID.Source auto [default]
      GSM.CellOptions.RADIO-LINK-TIMEOUT 15 [default]
      GSM.CellSelection.CELL-RESELECT-HYSTERESIS 3 [default]
      GSM.CellSelection.MS-TXPWR-MAX-CCH 0 [default]
      GSM.CellSelection.NCCsPermitted 0 [default]
      GSM.CellSelection.NECI 1 [default]
      GSM.CellSelection.RXLEV-ACCESS-MIN 0 [default]
      GSM.Channels.C1sFirst 0 [default]
      GSM.Channels.NumC1s auto [default]
      GSM.Channels.NumC7s auto [default]
      GSM.Channels.SDCCHReserve 0 [default]
      GSM.Cipher.CCHBER 0 [default]
      GSM.Cipher.Encrypt 0 [default]
      GSM.Cipher.RandomNeighbor 0 [default]
      GSM.Cipher.ScrambleFiller 0 [default]
      GSM.Control.GPRSMaxIgnore 5 [default]
      GSM.Handover.FailureHoldoff 20 [default]
      GSM.Handover.History.Max 32 [default]
      GSM.Handover.Margin 15 [default]
      GSM.Handover.Ny1 50 [default]
      GSM.Handover.RXLEV_DL.History 6 [default]
      GSM.Handover.RXLEV_DL.Margin 10 [default]
      GSM.Handover.RXLEV_DL.PenaltyTime 20 [default]
      GSM.Handover.RXLEV_DL.Target 60 [default]
      GSM.Identity.BSIC.BCC 2 [default]
      GSM.Identity.BSIC.NCC 0 [default]
      GSM.Identity.CI 10 [default]
      GSM.Identity.LAC 1000 [default]
      GSM.Identity.MCC 001 [default]
      GSM.Identity.MNC 01 [default]
      GSM.Identity.ShortName MyNET
      GSM.MS.Power.Damping 75 [default]
      GSM.MS.Power.Max 33 [default]
      GSM.MS.Power.Min 5 [default]
      GSM.MS.TA.Damping 50 [default]
      GSM.MS.TA.Max 62 [default]
      GSM.MaxSpeechLatency 2 [default]
      GSM.Neighbors (disabled) [default]
      GSM.Neighbors.NumToSend 31 [default]
      GSM.RACH.AC 0x0400 [default]
      GSM.RACH.MaxRetrans 1 [default]
      GSM.RACH.TxInteger 14 [default]
      GSM.RRLP.ACCURACY 40 [default]
      GSM.RRLP.ALMANAC.ASSIST.PRESENT 0 [default]
      GSM.RRLP.ALMANAC.REFRESH.TIME 24.0 [default]
      GSM.RRLP.ALMANAC.URL http://www.navcen.uscg.gov/?pageName=currentAlmanac&format=yuma [default]
      GSM.RRLP.EPHEMERIS.ASSIST.COUNT 9 [default]
      GSM.RRLP.EPHEMERIS.REFRESH.TIME 1.0 [default]
      GSM.RRLP.EPHEMERIS.URL ftp://ftp.trimble.com/pub/eph/CurRnxN.nav [default]
      GSM.RRLP.RESPONSETIME 4 [default]
      GSM.RRLP.SEED.ALTITUDE 0 [default]
      GSM.RRLP.SEED.LATITUDE 37.777423 [default]
      GSM.RRLP.SEED.LONGITUDE -122.39807 [default]
      GSM.RRLP.SERVER.URL (disabled) [default]
      GSM.Radio.ARFCNs 1 [default]
      GSM.Radio.Band 900 [default]
      GSM.Radio.C0 51 [default]
      GSM.Radio.MaxExpectedDelaySpread 4 [default]
      GSM.Radio.NeedBSIC 0 [default]
      GSM.Radio.PowerManager.MaxAttenDB 20
      GSM.Radio.PowerManager.MinAttenDB 20
      GSM.Radio.PowerManager.RampTime 60 [default]
      GSM.Radio.RSSIAveragePeriod 8 [default]
      GSM.Radio.RSSITarget -50 [default]
      GSM.Radio.RxGain 10
      GSM.Radio.SNRAveragePeriod 8 [default]
      GSM.Radio.SNRTarget 10 [default]
      GSM.ShowCountry 0 [default]
      GSM.SpeechBuffer 1 [default]
      GSM.Timer.Handover.Holdoff 10 [default]
      GSM.Timer.T3103 12000 [default]
      GSM.Timer.T3105 50 [default]
      GSM.Timer.T3109 30000 [default]
      GSM.Timer.T3113 10000 [default]
      GSM.Timer.T3212 0 [default]
      Log.Alarms.Max 20 [default]
      Log.File (disabled) [default]
      Log.Level NOTICE [default]
      NodeManager.API.PhysicalStatus disabled [default]
      NodeManager.Commands.Port 45060 [default]
      NodeManager.Events.Port 45160 [default]
      Peering.Neighbor.RefreshAge 60 [default]
      Peering.NeighborTable.Path /var/run/NeighborTable.db [default]
      Peering.Port 16001 [default]
      Peering.ResendCount 20 [default]
      Peering.ResendTimeout 100 [default]
      RTP.Range 98 [default]
      RTP.Start 16484 [default]
      SGSN.Debug 0 [default]
      SGSN.Timer.ImplicitDetach 3480 [default]
      SGSN.Timer.MS.Idle 600 [default]
      SGSN.Timer.RAUpdate 0 [default]
      SGSN.Timer.Ready 44 [default]
      SIP.DTMF.RFC2833 1 [default]
      SIP.DTMF.RFC2833.PayloadType 101 [default]
      SIP.DTMF.RFC2967 0 [default]
      SIP.DTMF.RFC2976 0 [default]
      SIP.Local.IP 127.0.0.1 [default]
      SIP.Local.Port 5062 [default]
      SIP.MaxForwards 70 [default]
      SIP.Proxy.Mode (disabled) [default]
      SIP.Proxy.Registration 127.0.0.1:5064 [default]
      SIP.Proxy.SMS 127.0.0.1:5063 [default]
      SIP.Proxy.Speech 127.0.0.1:5060 [default]
      SIP.Proxy.USSD (disabled) [default]
      SIP.RFC3428.NoTrying 0 [default]
      SIP.Realm (disabled) [default]
      SIP.RegistrationPeriod 90 [default]
      SIP.SMSC smsc [default]
      SIP.Timer.A 2000 [default]
      SIP.Timer.B 10000 [default]
      SIP.Timer.E 500 [default]
      SIP.Timer.F 5000 [default]
      SIP.Timer.H 5000 [default]
      SMS.FakeSrcSMSC 0000 [default]
      SMS.MIMEType application/vnd.3gpp.sms [default]
      TRX.IP 127.0.0.1 [default]
      TRX.MinimumRxRSSI -63
      TRX.Port 5700 [default]
      TRX.RadioFrequencyOffset 128 [default]
      TRX.Timeout.Clock 10 [default]
      TRX.Timeout.Start 2 [default]
      TRX.TxAttenOffset 0 [default]
      Test.GSM.SimulatedFER.Downlink 0 [default]
      Test.GSM.SimulatedFER.Uplink 0 [default]
      Test.GSM.UplinkFuzzingRate 0 [default]
      Test.SIP.SimulatedPacketLoss 0 [default]




      Any idea about what could be the cause? Thank you






      connection ubuntu-16.04 mobile-phone gprs







      share|improve this question
















      Initial setup



      OpenBTS installed on Ubuntu 16.04, two mobile phones connected to the OpenBTS network. SIM are successfully registered on sipauthserve. Transceiver: USRP X310, USRP N210.



      Problem



      In turn, the phones loose connection to the network for some seconds. If GPRS is not enabled in OpenBTS configuration, this issue almost never happen.



      If i initiate a call from a phone while it is in "no-network moment", the OpenBTS server does not receive anything. Dial error is displayed on the phone.



      If a phone that is in "no-network moment" is called by a working phone, the call fails. Asterisk log return:




      Jan 15 16:25:50 bar asterisk[3702]: VERBOSE[5036][C-00000028]: pbx.c:4898 in pbx_extension_helper: -- Executing [h@phones:1] Log("SIP/00101100010-0000004c", "NOTICE,A-Number=1387 A-Name= A-IMSI=IMSI222016703294271 B-Number=973742 B-Name= B-IMSI=IMSI222992311440168 hangupcause=27 dialstatus=CONGESTION hangupdirection=SYSTEM duration=13 billsec=0") in new stack




      This is the OpenBTS configuration:




      OpenBTS> devconfig
      CLI.Interface 127.0.0.1 [default]
      CLI.Port 49300 [default]
      Control.CDR.Dirname (disabled) [default]
      Control.Call.QueryRRLP.Early 0 [default]
      Control.Call.QueryRRLP.Late 0 [default]
      Control.GSMTAP.GPRS 1
      Control.GSMTAP.GSM 1
      Control.GSMTAP.TargetIP 127.0.0.1 [default]
      Control.LUR.404RejectCause 0x04 [default]
      Control.LUR.AttachDetach 1 [default]
      Control.LUR.FailMode ACCEPT [default]
      Control.LUR.FailedRegistration.Message Your handset is not provisioned for this network. [default]
      Control.LUR.FailedRegistration.ShortCode 1000 [default]
      Control.LUR.NormalRegistration.Message (disabled) [default]
      Control.LUR.NormalRegistration.ShortCode 0000 [default]
      Control.LUR.OpenRegistration (disabled) [default]
      Control.LUR.OpenRegistration.Message Welcome to the test network. Your IMSI is [default]
      Control.LUR.OpenRegistration.Reject (disabled) [default]
      Control.LUR.OpenRegistration.ShortCode 101 [default]
      Control.LUR.QueryClassmark 0 [default]
      Control.LUR.QueryIMEI 0 [default]
      Control.LUR.QueryRRLP 0 [default]
      Control.LUR.RegistrationMessageFrequency FIRST [default]
      Control.LUR.SendTMSIs 1
      Control.LUR.TestMode 0 [default]
      Control.LUR.UnprovisionedRejectCause 0x04 [default]
      Control.NumSQLTries 3 [default]
      Control.Reporting.PhysStatusTable /var/run/ChannelTable.db [default]
      Control.Reporting.StatsTable /var/log/OpenBTSStats.db [default]
      Control.Reporting.TMSITable /var/run/TMSITable.db [default]
      Control.Reporting.TransactionMaxCompletedRecords 100 [default]
      Control.Reporting.TransactionTable /var/run/TransactionTable.db [default]
      Control.SACCHTimeout.BumpDown 1 [default]
      Control.SMS.QueryRRLP 0 [default]
      Control.SMSCB.Table (disabled) [default]
      Control.TMSITable.MaxAge 576 [default]
      Control.VEA 0 [default]
      Control.WatchdogMinutes 0 [default]
      Core.File core.openbts [default]
      Core.Pid 0 [default]
      Core.SaveFiles 1 [default]
      Core.TarFile /tmp/openbtsfiles.tgz [default]
      GGSN.DNS 8.8.8.8
      GGSN.Firewall.Enable 0
      GGSN.IP.MaxPacketSize 1520 [default]
      GGSN.IP.ReuseTimeout 180 [default]
      GGSN.IP.TossDuplicatePackets 0 [default]
      GGSN.Logfile.Name /tmp/GGSN.log
      GGSN.MS.IP.Base 192.168.99.1 [default]
      GGSN.MS.IP.MaxCount 254 [default]
      GGSN.MS.IP.Route (disabled) [default]
      GGSN.ShellScript (disabled) [default]
      GGSN.TunName sgsntun [default]
      GPRS.CellOptions.T3168Code 5 [default]
      GPRS.CellOptions.T3192Code 0 [default]
      GPRS.ChannelCodingControl.RSSI -40 [default]
      GPRS.Channels.Congestion.Threshold 200 [default]
      GPRS.Channels.Congestion.Timer 60 [default]
      GPRS.Channels.Min.C0 2 [default]
      GPRS.Channels.Min.CN 0 [default]
      GPRS.Codecs.Downlink 1,4 [default]
      GPRS.Codecs.Uplink 1,4 [default]
      GPRS.Counters.Assign 10 [default]
      GPRS.Counters.N3101 20 [default]
      GPRS.Counters.N3103 8 [default]
      GPRS.Counters.N3105 12 [default]
      GPRS.Counters.Reassign 6 [default]
      GPRS.Counters.TbfRelease 5 [default]
      GPRS.Debug 0 [default]
      GPRS.Downlink.KeepAlive 300 [default]
      GPRS.Downlink.Persist 0 [default]
      GPRS.Enable 0 [default]
      GPRS.LocalTLLI.Enable 1 [default]
      GPRS.MS.KeepExpiredCount 20 [default]
      GPRS.MS.Power.Alpha 10 [default]
      GPRS.MS.Power.Gamma 31 [default]
      GPRS.MS.Power.T_AVG_T 15 [default]
      GPRS.MS.Power.T_AVG_W 15 [default]
      GPRS.Multislot.Max.Downlink 3 [default]
      GPRS.Multislot.Max.Uplink 2 [default]
      GPRS.NC.NetworkControlOrder 2 [default]
      GPRS.NMO 2 [default]
      GPRS.PRIORITY-ACCESS-THR 6 [default]
      GPRS.RAC 0 [default]
      GPRS.RA_COLOUR 0 [default]
      GPRS.RRBP.Min 0 [default]
      GPRS.Reassign.Enable 1 [default]
      GPRS.SendIdleFrames 0 [default]
      GPRS.TBF.Downlink.Poll1 10 [default]
      GPRS.TBF.EST 1 [default]
      GPRS.TBF.Expire 30000 [default]
      GPRS.TBF.KeepExpiredCount 20 [default]
      GPRS.TBF.Retry 1 [default]
      GPRS.Timers.Channels.Idle 6000 [default]
      GPRS.Timers.MS.Idle 600 [default]
      GPRS.Timers.MS.NonResponsive 6000 [default]
      GPRS.Timers.T3169 5000 [default]
      GPRS.Timers.T3191 5000 [default]
      GPRS.Timers.T3193 0 [default]
      GPRS.Timers.T3195 5000 [default]
      GPRS.Uplink.KeepAlive 300 [default]
      GPRS.Uplink.Persist 4000 [default]
      GPRS.advanceblocks 10 [default]
      GSM.BTS.RADIO_LINK_TIMEOUT 15 [default]
      GSM.CCCH.BS_AG_BLKS_RES auto [default]
      GSM.CCCH.BS_PA_MFRMS 2 [default]
      GSM.CCCH.CCCH-CONF 1 [default]
      GSM.CallerID.Source auto [default]
      GSM.CellOptions.RADIO-LINK-TIMEOUT 15 [default]
      GSM.CellSelection.CELL-RESELECT-HYSTERESIS 3 [default]
      GSM.CellSelection.MS-TXPWR-MAX-CCH 0 [default]
      GSM.CellSelection.NCCsPermitted 0 [default]
      GSM.CellSelection.NECI 1 [default]
      GSM.CellSelection.RXLEV-ACCESS-MIN 0 [default]
      GSM.Channels.C1sFirst 0 [default]
      GSM.Channels.NumC1s auto [default]
      GSM.Channels.NumC7s auto [default]
      GSM.Channels.SDCCHReserve 0 [default]
      GSM.Cipher.CCHBER 0 [default]
      GSM.Cipher.Encrypt 0 [default]
      GSM.Cipher.RandomNeighbor 0 [default]
      GSM.Cipher.ScrambleFiller 0 [default]
      GSM.Control.GPRSMaxIgnore 5 [default]
      GSM.Handover.FailureHoldoff 20 [default]
      GSM.Handover.History.Max 32 [default]
      GSM.Handover.Margin 15 [default]
      GSM.Handover.Ny1 50 [default]
      GSM.Handover.RXLEV_DL.History 6 [default]
      GSM.Handover.RXLEV_DL.Margin 10 [default]
      GSM.Handover.RXLEV_DL.PenaltyTime 20 [default]
      GSM.Handover.RXLEV_DL.Target 60 [default]
      GSM.Identity.BSIC.BCC 2 [default]
      GSM.Identity.BSIC.NCC 0 [default]
      GSM.Identity.CI 10 [default]
      GSM.Identity.LAC 1000 [default]
      GSM.Identity.MCC 001 [default]
      GSM.Identity.MNC 01 [default]
      GSM.Identity.ShortName MyNET
      GSM.MS.Power.Damping 75 [default]
      GSM.MS.Power.Max 33 [default]
      GSM.MS.Power.Min 5 [default]
      GSM.MS.TA.Damping 50 [default]
      GSM.MS.TA.Max 62 [default]
      GSM.MaxSpeechLatency 2 [default]
      GSM.Neighbors (disabled) [default]
      GSM.Neighbors.NumToSend 31 [default]
      GSM.RACH.AC 0x0400 [default]
      GSM.RACH.MaxRetrans 1 [default]
      GSM.RACH.TxInteger 14 [default]
      GSM.RRLP.ACCURACY 40 [default]
      GSM.RRLP.ALMANAC.ASSIST.PRESENT 0 [default]
      GSM.RRLP.ALMANAC.REFRESH.TIME 24.0 [default]
      GSM.RRLP.ALMANAC.URL http://www.navcen.uscg.gov/?pageName=currentAlmanac&format=yuma [default]
      GSM.RRLP.EPHEMERIS.ASSIST.COUNT 9 [default]
      GSM.RRLP.EPHEMERIS.REFRESH.TIME 1.0 [default]
      GSM.RRLP.EPHEMERIS.URL ftp://ftp.trimble.com/pub/eph/CurRnxN.nav [default]
      GSM.RRLP.RESPONSETIME 4 [default]
      GSM.RRLP.SEED.ALTITUDE 0 [default]
      GSM.RRLP.SEED.LATITUDE 37.777423 [default]
      GSM.RRLP.SEED.LONGITUDE -122.39807 [default]
      GSM.RRLP.SERVER.URL (disabled) [default]
      GSM.Radio.ARFCNs 1 [default]
      GSM.Radio.Band 900 [default]
      GSM.Radio.C0 51 [default]
      GSM.Radio.MaxExpectedDelaySpread 4 [default]
      GSM.Radio.NeedBSIC 0 [default]
      GSM.Radio.PowerManager.MaxAttenDB 20
      GSM.Radio.PowerManager.MinAttenDB 20
      GSM.Radio.PowerManager.RampTime 60 [default]
      GSM.Radio.RSSIAveragePeriod 8 [default]
      GSM.Radio.RSSITarget -50 [default]
      GSM.Radio.RxGain 10
      GSM.Radio.SNRAveragePeriod 8 [default]
      GSM.Radio.SNRTarget 10 [default]
      GSM.ShowCountry 0 [default]
      GSM.SpeechBuffer 1 [default]
      GSM.Timer.Handover.Holdoff 10 [default]
      GSM.Timer.T3103 12000 [default]
      GSM.Timer.T3105 50 [default]
      GSM.Timer.T3109 30000 [default]
      GSM.Timer.T3113 10000 [default]
      GSM.Timer.T3212 0 [default]
      Log.Alarms.Max 20 [default]
      Log.File (disabled) [default]
      Log.Level NOTICE [default]
      NodeManager.API.PhysicalStatus disabled [default]
      NodeManager.Commands.Port 45060 [default]
      NodeManager.Events.Port 45160 [default]
      Peering.Neighbor.RefreshAge 60 [default]
      Peering.NeighborTable.Path /var/run/NeighborTable.db [default]
      Peering.Port 16001 [default]
      Peering.ResendCount 20 [default]
      Peering.ResendTimeout 100 [default]
      RTP.Range 98 [default]
      RTP.Start 16484 [default]
      SGSN.Debug 0 [default]
      SGSN.Timer.ImplicitDetach 3480 [default]
      SGSN.Timer.MS.Idle 600 [default]
      SGSN.Timer.RAUpdate 0 [default]
      SGSN.Timer.Ready 44 [default]
      SIP.DTMF.RFC2833 1 [default]
      SIP.DTMF.RFC2833.PayloadType 101 [default]
      SIP.DTMF.RFC2967 0 [default]
      SIP.DTMF.RFC2976 0 [default]
      SIP.Local.IP 127.0.0.1 [default]
      SIP.Local.Port 5062 [default]
      SIP.MaxForwards 70 [default]
      SIP.Proxy.Mode (disabled) [default]
      SIP.Proxy.Registration 127.0.0.1:5064 [default]
      SIP.Proxy.SMS 127.0.0.1:5063 [default]
      SIP.Proxy.Speech 127.0.0.1:5060 [default]
      SIP.Proxy.USSD (disabled) [default]
      SIP.RFC3428.NoTrying 0 [default]
      SIP.Realm (disabled) [default]
      SIP.RegistrationPeriod 90 [default]
      SIP.SMSC smsc [default]
      SIP.Timer.A 2000 [default]
      SIP.Timer.B 10000 [default]
      SIP.Timer.E 500 [default]
      SIP.Timer.F 5000 [default]
      SIP.Timer.H 5000 [default]
      SMS.FakeSrcSMSC 0000 [default]
      SMS.MIMEType application/vnd.3gpp.sms [default]
      TRX.IP 127.0.0.1 [default]
      TRX.MinimumRxRSSI -63
      TRX.Port 5700 [default]
      TRX.RadioFrequencyOffset 128 [default]
      TRX.Timeout.Clock 10 [default]
      TRX.Timeout.Start 2 [default]
      TRX.TxAttenOffset 0 [default]
      Test.GSM.SimulatedFER.Downlink 0 [default]
      Test.GSM.SimulatedFER.Uplink 0 [default]
      Test.GSM.UplinkFuzzingRate 0 [default]
      Test.SIP.SimulatedPacketLoss 0 [default]




      Any idea about what could be the cause? Thank you






      connection ubuntu-16.04 mobile-phone gprs




      connection ubuntu-16.04 mobile-phone gprs






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      share|improve this question




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      edited Jan 16 at 8:41







      TDK

















      asked Jan 15 at 15:35









      TDKTDK

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