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Internet keep dropping connection

Internet Forum

Activity: 4 Replies | 1 Subscribers

This question is still unresolved
Posted by

For the pass few days my internet keep dropping connection. My modem reset, stuck blinking on Send, then reset and back to blinking on Send.

I'm not sure if the power cycle is what eventually got my connection up or the waiting but here is my modem information. Thanks

Model Name: SB5120

Modem Name: Motorola

Serial Number: 122103433415614800000000

Software Version: SB5120-2.19.0.16-SCM00-NOSH
Hardware Version: 1
MIB Version: II
GUI Version: 1.0
VxWorks Version: 5.4

Configuration

Frequency Plan:

North American Standard/HRC/IRC

Upstream Channel ID:

2

Favorite Frequency (Hz):

855000000

Downstream

Value

Frequency

855000000 Hz 

Signal to Noise Ratio

38 dB 

QAM

QAM256

Network Access Control Object

OFF

Power Level

1 dBmV  

The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

Upstream

Value

Channel ID

3

Frequency

32000000 Hz

Ranging Service ID

2683

Symbol Rate

5.120 Msym/s

Power Level

54 dBmV

Time

Priority

Code

Message

1970-01-01 00:01:30

3-Critical

R02.0

No Ranging Response received - T3 time-out

1970-01-01 00:01:19

5-Warning

SYNC: US Gain in cache is invalid: 0.00

1970-01-01 00:01:17

7-Information

Starting Ranging On Channel 1

1970-01-01 00:01:09

3-Critical

R02.0

No Ranging Response received - T3 time-out

1970-01-01 00:01:01

5-Warning

SYNC: US Gain in cache is invalid: 54.10

1970-01-01 00:01:00

7-Information

Starting Ranging On Channel 4

1970-01-01 00:00:41

3-Critical

R02.0

No Ranging Response received - T3 time-out

1970-01-01 00:00:37

5-Warning

SYNC: US Gain in cache is invalid: 54.30

1970-01-01 00:00:36

7-Information

Starting Ranging On Channel 2

1970-01-01 00:00:32

7-Information

Downstream Locked - Collecting Upstream Information

1970-01-01 00:00:29

7-Information

Scanning frequency 855000000Hz

1970-01-01 00:00:01

7-Information

Trying to synchronize ...

1970-01-01 00:00:01

7-Information

Vendor Cold Start

2013-07-24 18:37:04

7-Information

Scanning frequency 829791000Hz

2013-07-24 18:36:22

3-Critical

T01.0

SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing

2013-07-24 18:36:22

7-Information

Scanning frequency 855000000Hz

2013-07-24 18:36:22

3-Critical

T04.0

SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period

2013-07-24 18:36:22

4-Error

SYNC: Hardware didn't detect SYNC msg for 600ms during Initial Ranging

2013-07-24 18:36:13

3-Critical

R02.0

No Ranging Response received - T3 time-out

2013-07-24 18:36:05

5-Warning

SYNC: US Gain in cache is invalid: 0.00

Event Log has reached maximum size. Older log entries are lost.

All Replies
  • Posted by EdwardH
    25 Jul 2013 1:22 PM

    The upstream signal levels are barely in range based on your log, and the Sync errors are tied to it on restarting trying to get send solid with the modem. Is there any kind of splitter or amplifier on the coaxial line you are aware of there?

    Ed H. - Cox Support Forums Moderator

  • Posted by Drakka
    26 Jul 2013 4:59 PM

    I don't have any kind of splitter or amplifier on the coaxial line. My connection comes straight from the wall to my modem.

    For the past 48 hours my internet connection seems to be doing fine. I have not had any drop connection since I posted my modem log.

    I will come back and post here if I run into the same issue.

    Thank you for you help Ed H. Smile

  • Posted by Drakka
    31 Jul 2013 7:08 PM

    I didn't think I would have to come back to post again. I thought that was the last of it and I would sit back and enjoy my internet but alas I am here.  

    Below is the internet disconnect log for today. I attempt to capture the sequence that led to the disconnect back to recovery then back to the disconnect and etc in hopes that the information will led to  finding the root cause.

    Internet Drop



     

    Downstream

    Value

    Frequency

    849000000 Hz 

    Signal to Noise Ratio

    37 dB 

    QAM

    QAM256

    Network Access Control Object

    OFF

    Power Level

    1 dBmV  

    The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

    Upstream

    Value

    Channel ID

    4

    Frequency

    25400000 Hz

    Ranging Service ID

    2683

    Symbol Rate

    5.120 Msym/s

    Power Level

    54 dBmV

    Time

    Priority

    Code

    Message

    2013-07-30 18:44:25

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-30 18:44:22

    5-Warning

    SYNC: US Gain in cache is invalid: 0.00

    2013-07-30 18:44:20

    7-Information

    Starting Ranging On Channel 4

    2013-07-30 18:44:16

    7-Information

    Downstream Locked - Collecting Upstream Information

    2013-07-30 18:44:13

    7-Information

    Scanning frequency 837000000Hz

    2013-07-30 18:43:44

    3-Critical

    T04.0

    SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period

    2013-07-30 18:43:44

    4-Error

    SYNC: Hardware didn't detect SYNC msg for 600ms during Initial Ranging

    2013-07-30 18:43:44

    7-Information

    Scanning frequency 133756000Hz

    2013-07-30 18:43:44

    3-Critical

    T01.0

    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing

    2013-07-30 18:43:44

    7-Information

    Scanning frequency 145757000Hz

    2013-07-30 18:43:44

    3-Critical

    U02.0

    UCD invalid or channel unusable

    2013-07-30 18:43:24

    7-Information

    Starting Ranging On Channel 1

    2013-07-30 18:43:11

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-30 18:43:04

    5-Warning

    SYNC: US Gain in cache is invalid: 54.10

    2013-07-30 18:43:03

    7-Information

    Starting Ranging On Channel 4

    2013-07-30 18:42:53

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-30 18:42:36

    5-Warning

    SYNC: US Gain in cache is invalid: 0.00

    2013-07-30 18:42:35

    7-Information

    Starting Ranging On Channel 3

    2013-07-30 18:42:10

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-30 18:42:06

    5-Warning

    SYNC: US Gain in cache is invalid: 54.30

    Event Log has reached maximum size. Older log entries are lost.

    Internet Came Back

    Downstream

    Value

    Frequency

    837000000 Hz 

    Signal to Noise Ratio

    37 dB 

    QAM

    QAM256

    Network Access Control Object

    ON

    Power Level

    0 dBmV  

    The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

    Upstream

    Value

    Channel ID

    4

    Frequency

    25400000 Hz

    Ranging Service ID

    2683

    Symbol Rate

    5.120 Msym/s

    Power Level

    53 dBmV

    Time

    Priority

    Code

    Message

    2013-07-30 18:44:53

    7-Information

    DS multicast is not mapped to SAID

    2013-07-30 18:44:53

    7-Information

    B605.10

    Map Reject - Downstream Traffic Flow Not Mapped to BPI+ SAID

    2013-07-30 18:44:53

    7-Information

    B601.0

    SA Map State Machine Started

    2013-07-30 18:44:50

    7-Information

    DS multicast is not mapped to SAID

    2013-07-30 18:44:50

    7-Information

    B605.10

    Map Reject - Downstream Traffic Flow Not Mapped to BPI+ SAID

    2013-07-30 18:44:50

    7-Information

    B601.0

    SA Map State Machine Started

    2013-07-30 18:44:48

    7-Information

    SNMP: Working in SNMP V1/2c Only NmAccess mode

    2013-07-30 18:44:48

    7-Information

    DS multicast is not mapped to SAID

    2013-07-30 18:44:48

    7-Information

    B605.10

    Map Reject - Downstream Traffic Flow Not Mapped to BPI+ SAID

    2013-07-30 18:44:48

    7-Information

    B601.0

    SA Map State Machine Started

    2013-07-30 18:44:46

    7-Information

    INITIALIZATION COMPLETE - MODEM IS OPERATIONAL

    2013-07-30 18:44:46

    7-Information

    B401.0

    Authorized

    2013-07-30 18:44:46

    6-Notice

    I401.0

    TLV-11 - unrecognized OID

    2013-07-30 18:44:46

    7-Information

    SEC: Co-Signer CVC from configuration file was verified

    2013-07-30 18:44:46

    7-Information

    REGISTRATION COMPLETE - Waiting for Operational status

    2013-07-30 18:44:45

    7-Information

    REG: Capability type <15> isn't supported by CMTS

    2013-07-30 18:44:45

    7-Information

    Registration file - downloaded

    2013-07-30 18:44:44

    7-Information

    Trying to download Configuration file ...

    2013-07-30 18:44:44

    7-Information

    Time of day - retrieved

    2013-07-30 18:44:43

    7-Information

    DHCP - parameters acquired

    Down then recover

    Downstream

    Value

    Frequency

    855000000 Hz 

    Signal to Noise Ratio

    38 dB 

    QAM

    QAM256

    Network Access Control Object

    OFF

    Power Level

    1 dBmV  

    The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

    Upstream

    Value

    Channel ID

    3

    Frequency

    32000000 Hz

    Ranging Service ID

    2683

    Symbol Rate

    5.120 Msym/s

    Power Level

    54 dBmV

    Time

    Priority

    Code

    Message

    2013-07-31 19:05:26

    7-Information

    Registration file - downloaded

    2013-07-31 19:05:25

    7-Information

    Trying to download Configuration file ...

    2013-07-31 19:05:25

    7-Information

    Time of day - retrieved

    2013-07-31 19:05:24

    7-Information

    DHCP - parameters acquired

    2013-07-31 19:05:24

    7-Information

    DHCP: ACK: Setting (*) CM TFTP Boot file: 150001_vm2.0_d.cfg

    2013-07-31 19:05:24

    7-Information

    DHCP: Setting CM IP address to: 10.10.194.222

    2013-07-31 19:05:20

    7-Information

    DHCP: Setting (*) CM Syslog Server address to: 10.254.254.254

    2013-07-31 19:05:20

    7-Information

    DHCP: Setting (*) CM Time Server address to: 172.19.65.31

    2013-07-31 19:05:20

    7-Information

    DHCP: Setting (*) CM Subnet mask to: 255.255.248.0

    2013-07-31 19:05:20

    7-Information

    DHCP: Setting (*) CM Gateway address to: 10.10.192.1

    2013-07-31 19:05:20

    7-Information

    DHCP: OFFER: Setting (*) CM TFTP Boot file: 150001_vm2.0_d.cfg

    2013-07-31 19:05:20

    7-Information

    DHCP select: Setting (*) CM TFTP Server address to: 172.23.1.90

    2013-07-31 19:05:20

    7-Information

    DHCP: Offered (*) CM IP address to: 10.10.194.222

    2013-07-31 19:05:16

    7-Information

    Trying to register through CMTS...

    2013-07-31 19:05:16

    7-Information

    SYNCHRONIZED - 855000000 Hz , ucd 4

    2013-07-31 19:05:12

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:05:02

    5-Warning

    SYNC: US Gain in cache is invalid: 54.10

    2013-07-31 19:05:01

    7-Information

    Starting Ranging On Channel 4

    2013-07-31 19:04:57

    7-Information

    Downstream Locked - Collecting Upstream Information

    2013-07-31 19:04:55

    7-Information

    Scanning frequency 855000000Hz

    Event Log has reached maximum size. Older log entries are lost.

    Time

    Priority

    Code

    Message

    2013-07-31 19:24:55

    7-Information

    Starting Ranging On Channel 3

    2013-07-31 19:24:43

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:24:24

    5-Warning

    SYNC: US Gain in cache is invalid: 54.10

    2013-07-31 19:24:24

    7-Information

    Starting Ranging On Channel 4

    2013-07-31 19:24:20

    7-Information

    Downstream Locked - Collecting Upstream Information

    2013-07-31 19:24:17

    7-Information

    Scanning frequency 855000000Hz

    2013-07-31 19:24:04

    3-Critical

    T04.0

    SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period

    2013-07-31 19:24:04

    4-Error

    SYNC: Hardware didn't detect SYNC msg for 600ms during Initial Ranging

    2013-07-31 19:24:04

    7-Information

    Scanning frequency 103754000Hz

    2013-07-31 19:24:03

    3-Critical

    T01.0

    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing

    2013-07-31 19:24:03

    7-Information

    Scanning frequency 91754000Hz

    2013-07-31 19:24:03

    3-Critical

    U02.0

    UCD invalid or channel unusable

    2013-07-31 19:23:55

    7-Information

    Starting Ranging On Channel 3

    2013-07-31 19:23:35

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:23:22

    5-Warning

    SYNC: US Gain in cache is invalid: 0.00

    2013-07-31 19:23:22

    7-Information

    Starting Ranging On Channel 2

    2013-07-31 19:22:45

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:22:36

    5-Warning

    SYNC: US Gain in cache is invalid: 54.10

    2013-07-31 19:22:35

    7-Information

    Starting Ranging On Channel 4

    2013-07-31 19:22:31

    7-Information

    Downstream Locked - Collecting Upstream Information

    Event Log has reached maximum size. Older log entries are lost.

    Time

    Priority

    Code

    Message

    2013-07-31 19:25:28

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:25:26

    5-Warning

    SYNC: US Gain in cache is invalid: 0.00

    2013-07-31 19:25:25

    7-Information

    Starting Ranging On Channel 2

    2013-07-31 19:24:43

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:24:24

    5-Warning

    SYNC: US Gain in cache is invalid: 54.10

    2013-07-31 19:24:24

    7-Information

    Starting Ranging On Channel 4

    2013-07-31 19:24:20

    7-Information

    Downstream Locked - Collecting Upstream Information

    2013-07-31 19:24:17

    7-Information

    Scanning frequency 855000000Hz

    2013-07-31 19:24:04

    3-Critical

    T04.0

    SYNC Timing Synchronization failure - Failed to receive MAC SYNC frame within time-out period

    2013-07-31 19:24:04

    4-Error

    SYNC: Hardware didn't detect SYNC msg for 600ms during Initial Ranging

    2013-07-31 19:24:04

    7-Information

    Scanning frequency 103754000Hz

    2013-07-31 19:24:03

    3-Critical

    T01.0

    SYNC Timing Synchronization failure - Failed to acquire QAM/QPSK symbol timing

    2013-07-31 19:24:03

    7-Information

    Scanning frequency 91754000Hz

    2013-07-31 19:24:03

    3-Critical

    U02.0

    UCD invalid or channel unusable

    2013-07-31 19:23:55

    7-Information

    Starting Ranging On Channel 3

    2013-07-31 19:23:35

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:23:22

    5-Warning

    SYNC: US Gain in cache is invalid: 0.00

    2013-07-31 19:23:22

    7-Information

    Starting Ranging On Channel 2

    2013-07-31 19:22:45

    3-Critical

    R02.0

    No Ranging Response received - T3 time-out

    2013-07-31 19:22:36

    5-Warning

    SYNC: US Gain in cache is invalid: 54.10

    Event Log has reached maximum size. Older log entries are lost.

    Downstream

    Value

    Frequency

    855000000 Hz 

    Signal to Noise Ratio

    37 dB 

    QAM

    QAM256

    Network Access Control Object

    ON

    Power Level

    1 dBmV  

    The Downstream Power Level reading is a snapshot taken at the time this page was requested. Please Reload/Refresh this Page for a new reading

    Upstream

    Value

    Channel ID

    2

    Frequency

    37000000 Hz

    Ranging Service ID

    2683

    Symbol Rate

    2.560 Msym/s

    Power Level

    54 dBmV

    Time

    Priority

    Code

    Message

    2013-07-31 19:25:58

    4-Error

    IGMP: ERROR - Group address 0.0.0.1 is not a legal multicast

    2013-07-31 19:25:51

    7-Information

    SNMP: Working in SNMP V1/2c Only NmAccess mode

    2013-07-31 19:25:51

    4-Error

    IGMP: ERROR - Group address 0.0.0.1 is not a legal multicast

    2013-07-31 19:25:50

    7-Information

    INITIALIZATION COMPLETE - MODEM IS OPERATIONAL

    2013-07-31 19:25:50

    7-Information

    B401.0

    Authorized

    2013-07-31 19:25:49

    6-Notice

    I401.0

    TLV-11 - unrecognized OID

    2013-07-31 19:25:49

    7-Information

    SEC: Co-Signer CVC from configuration file was verified

    2013-07-31 19:25:49

    7-Information

    REGISTRATION COMPLETE - Waiting for Operational status

    2013-07-31 19:25:48

    7-Information

    REG: Capability type <15> isn't supported by CMTS

    2013-07-31 19:25:48

    7-Information

    Registration file - downloaded

    2013-07-31 19:25:47

    7-Information

    Trying to download Configuration file ...

    2013-07-31 19:25:47

    7-Information

    Time of day - retrieved

    2013-07-31 19:25:47

    7-Information

    DHCP - parameters acquired

    2013-07-31 19:25:47

    7-Information

    DHCP: ACK: Setting (*) CM TFTP Boot file: 150001_vm2.0_d.cfg

    2013-07-31 19:25:47

    7-Information

    DHCP: Setting CM IP address to: 10.10.194.222

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Syslog Server address to: 10.254.254.254

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Time Server address to: 172.19.65.31

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Subnet mask to: 255.255.248.0

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Gateway address to: 10.10.192.1

    2013-07-31 19:25:43

    7-Information

    DHCP: OFFER: Setting (*) CM TFTP Boot file: 150001_vm2.0_d.cfg

    Event Log has reached maximum size. Older log entries are lost.

    Internet Back up

    Priority

    Code

    Message

    2013-07-31 19:25:58

    4-Error

    IGMP: ERROR - Group address 0.0.0.1 is not a legal multicast

    2013-07-31 19:25:51

    7-Information

    SNMP: Working in SNMP V1/2c Only NmAccess mode

    2013-07-31 19:25:51

    4-Error

    IGMP: ERROR - Group address 0.0.0.1 is not a legal multicast

    2013-07-31 19:25:50

    7-Information

    INITIALIZATION COMPLETE - MODEM IS OPERATIONAL

    2013-07-31 19:25:50

    7-Information

    B401.0

    Authorized

    2013-07-31 19:25:49

    6-Notice

    I401.0

    TLV-11 - unrecognized OID

    2013-07-31 19:25:49

    7-Information

    SEC: Co-Signer CVC from configuration file was verified

    2013-07-31 19:25:49

    7-Information

    REGISTRATION COMPLETE - Waiting for Operational status

    2013-07-31 19:25:48

    7-Information

    REG: Capability type <15> isn't supported by CMTS

    2013-07-31 19:25:48

    7-Information

    Registration file - downloaded

    2013-07-31 19:25:47

    7-Information

    Trying to download Configuration file ...

    2013-07-31 19:25:47

    7-Information

    Time of day - retrieved

    2013-07-31 19:25:47

    7-Information

    DHCP - parameters acquired

    2013-07-31 19:25:47

    7-Information

    DHCP: ACK: Setting (*) CM TFTP Boot file: 150001_vm2.0_d.cfg

    2013-07-31 19:25:47

    7-Information

    DHCP: Setting CM IP address to: 10.10.194.222

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Syslog Server address to: 10.254.254.254

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Time Server address to: 172.19.65.31

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Subnet mask to: 255.255.248.0

    2013-07-31 19:25:43

    7-Information

    DHCP: Setting (*) CM Gateway address to: 10.10.192.1

    2013-07-31 19:25:43

    7-Information

    DHCP: OFFER: Setting (*) CM TFTP Boot file: 150001_vm2.0_d.cfg

    Event Log has reached maximum size. Older log entries are lost.

  • Posted by KipK
    31 Jul 2013 9:15 PM

    Based on what we see from here, the return signal level is hitting its max and the modem is resetting, so it appears to be a return path problem of some kind. It can really be anywhere from the modem itself all the way back to the tap. If there are no splitters or amplifiers that you know of or can access, the next step is to place a service call.

    --
    Kip K. - Cox Support Forums Moderator