Modem Disconnects

[JonnyR]

Hello all, I have VM 20mb broadband and I've had this problem for ages where my modem disconnects seemingly at random and I have to reset it in order to connect again.

I am ex-NTL and have the NTL(Ambit?) 250 modem connected to a Buffalo WHR-G125 router with Tomato firmware installed.

When I turn the modem on first time in the morning the ready light blinks slowly and I can't connect to the internet. This is usually fixed by resetting the modem.

It also disconnects randomly through out the day while I'm using it, were either the ready light blinks slowly, or both the sync and ready lights start flashing like crazy.

Here's some info from the modem while it's connected -

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 25
Downstream Frequency : 315000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : -1.1 dBmV
Downstream SNR : 33.6 dB

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 1
Upstream Frequency : 47400000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 52.0 dBmV
Upstream Mini-Slot Size : 2

Cable Modem Event Log
First Time Last Time Priority Description
Mon Nov 02 22:33:14 2009 Mon Nov 02 22:33:14 2009 Information (7) Downstream sync ok
Mon Nov 02 22:33:14 2009 Mon Nov 02 22:33:14 2009 Information (7) locked and synced to rescue CMTS...all is well!
Mon Nov 02 22:33:14 2009 Mon Nov 02 22:33:14 2009 Information (7) Downstream sync ok
Mon Nov 02 22:33:14 2009 Mon Nov 02 22:33:14 2009 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Mon Nov 02 22:33:14 2009 Mon Nov 02 22:33:14 2009 Information (7) Downstream sync failed
Mon Nov 02 22:33:13 2009 Mon Nov 02 22:33:13 2009 Information (7) Downstream sync ok
Mon Nov 02 22:33:13 2009 Mon Nov 02 22:33:13 2009 Information (7) locked and synced to rescue CMTS...all is well!
Mon Nov 02 22:33:13 2009 Mon Nov 02 22:33:13 2009 Information (7) Downstream sync ok
Mon Nov 02 22:33:13 2009 Mon Nov 02 22:33:13 2009 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Mon Nov 02 22:33:13 2009 Mon Nov 02 22:33:13 2009 Information (7) Downstream sync failed
Mon Nov 02 22:10:49 2009 Mon Nov 02 22:10:49 2009 Information (7) The s/w filename specified in the config file is the same as ...
Mon Nov 02 22:10:49 2009 Mon Nov 02 22:10:49 2009 Information (7) A software upgrade filename was specified in the config file.
Mon Nov 02 22:10:49 2009 Mon Nov 02 22:10:49 2009 Information (7) Authorized
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) Registration complete!
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) We registered with a DOCSIS 1.1 config file!
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) Received a REG-RSP message from the CMTS...
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) Sending a REG-REQ to the CMTS...
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) CableModem SNMP configure complete
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) IP init completed ok
Mon Nov 02 22:10:48 2009 Mon Nov 02 22:10:48 2009 Information (7) CableModem TFTP init ok
Time Not Established Time Not Established Information (7) CableModem DHCP client init ok
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Information (7) MAP w/initial maintenance region received
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) Beginning initial ranging...
Time Not Established Time Not Established Information (7) downstream time sync acquired...
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) starting ds time sync acquisition...
Time Not Established Time Not Established Information (7) Locked on the downstream. Waiting for UCDs...
Time Not Established Time Not Established Information (7) Downstream lock ok
Time Not Established Time Not Established Information (7) Sync Start
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.

[Welshchris]

Johnny R this sounds like the same issue im having atm in Swansea and its ongoing.

[JonnyR]

Ah well I'm from Belfast, northern Ireland if that's any help.

[Welshchris]

proberbly best to get Virgin to monitor the connection for a few days and see whats happening.

[JonnyR]

Ok, the modem ready light is flashing slowly yet I'm still able to connect to the internet.

Here's the info from the modem -

Cable Modem Downstream
Downstream Lock : Locked
Downstream Channel Id : 23
Downstream Frequency : 299000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 6952 Ksym/sec
Downstream Interleave Depth : taps12Increment17
Downstream Receive Power Level : -1.7 dBmV
Downstream SNR : 33.6 dB

Cable Modem Upstream
Upstream Lock : Locked
Upstream Channel ID : 1
Upstream Frequency : 47400000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 52.5 dBmV
Upstream Mini-Slot Size : 2

The light just came on then -

Cable Modem Event Log
First Time Last Time Priority Description
Tue Nov 03 12:28:55 2009 Tue Nov 03 12:28:55 2009 Information (7) Downstream sync ok
Tue Nov 03 12:28:55 2009 Tue Nov 03 12:28:55 2009 Information (7) locked and synced to rescue CMTS...all is well!
Tue Nov 03 12:28:55 2009 Tue Nov 03 12:28:55 2009 Information (7) Downstream sync ok
Tue Nov 03 12:28:55 2009 Tue Nov 03 12:28:55 2009 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Tue Nov 03 12:28:55 2009 Tue Nov 03 12:28:55 2009 Information (7) Downstream sync failed
Tue Nov 03 12:28:54 2009 Tue Nov 03 12:28:54 2009 Information (7) Downstream sync ok
Tue Nov 03 12:28:54 2009 Tue Nov 03 12:28:54 2009 Information (7) locked and synced to rescue CMTS...all is well!
Tue Nov 03 12:28:54 2009 Tue Nov 03 12:28:54 2009 Information (7) Downstream sync ok
Tue Nov 03 12:28:54 2009 Tue Nov 03 12:28:54 2009 Critical (3) SYNC Timing Synchronization failure - Loss of Sync
Tue Nov 03 12:28:54 2009 Tue Nov 03 12:28:54 2009 Information (7) Downstream sync failed
Tue Nov 03 10:31:11 2009 Tue Nov 03 10:31:11 2009 Information (7) DCC arrive new
Tue Nov 03 10:31:11 2009 Tue Nov 03 10:31:11 2009 Information (7) Locked on the downstream. Waiting for UCDs...
Tue Nov 03 10:31:11 2009 Tue Nov 03 10:31:11 2009 Information (7) Downstream lock ok
Tue Nov 03 10:31:11 2009 Tue Nov 03 10:31:11 2009 Information (7) DCC depart old
Tue Nov 03 10:31:11 2009 Tue Nov 03 10:31:11 2009 Information (7) Received DCC-REQ message...
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) The s/w filename specified in the config file is the same as ...
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) A software upgrade filename was specified in the config file.
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) Authorized
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) Registration complete!
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) We registered with a DOCSIS 1.1 config file!
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) Received a REG-RSP message from the CMTS...
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) Sending a REG-REQ to the CMTS...
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) CableModem SNMP configure complete
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) IP init completed ok
Tue Nov 03 10:31:01 2009 Tue Nov 03 10:31:01 2009 Information (7) CableModem TFTP init ok
Time Not Established Time Not Established Information (7) CableModem DHCP client init ok
Time Not Established Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Time Not Established Information (7) MAP w/initial maintenance region received
Time Not Established Time Not Established Information (7) Downstream sync ok
Time Not Established Time Not Established Information (7) Beginning initial ranging...
Time Not Established Time Not Established Information (7) downstream time sync acquired...
Time Not Established Time Not Established Information (7) Downstream sync ok