DSL frequent disconnects
drewko
Enthusiast - Level 1

I have suddenly started getting frequent disconnects on my DSL line which has otherwise worked well for several years. Here is a portion of the connect/system log showing disconnects "due to PADT received".  Any solutions? Thanks!

Diagnostic Log

Date: October 5, 2014
Time: 20:42:18

All Entries

        CURRENT MODEM STATUS

        DSL Modem Status.......  Up

        PPP Session Status......  Up

        Connection Type.........  PPPoE

        Time set from.............  Daylight Savings

        Time since last boot....  1 days, 12 hrs: 36 mins: 12 secs


EVENTS
**********************************************************************
Events are listed starting from the most recent.
**********************************************************************
SUN OCT 05 20:41:15 2014
      CWMP: Final Http Return Code = 204


SUN OCT 05 20:41:14 2014
      CWMP: Inform (200).  The following events are true: 6 CONNECTION REQUEST


SUN OCT 05 20:41:14 2014
      CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic


SUN OCT 05 20:41:14 2014
      CWMP: Inform (401).  The following events are true: 6 CONNECTION REQUEST


SUN OCT 05 20:41:14 2014
      CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic


SUN OCT 05 20:41:12 2014
      CWMP: Final Http Return Code = 204


SUN OCT 05 20:41:11 2014
      CWMP: Connection request from ACS 206.46.. succeeded


SUN OCT 05 20:41:11 2014
      CWMP: Inform (200).  The following events are true: 4 VALUE CHANGE


SUN OCT 05 20:41:11 2014
      CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic


SUN OCT 05 20:41:10 2014
      CWMP: Inform (401).  The following events are true: 4 VALUE CHANGE


SUN OCT 05 20:41:10 2014
      CWMP: TCP Connected, SSL Connection Succeeded, Auth Type = Basic


SUN OCT 05 20:40:41 2014
      Setting System clock to Daylight Savings Time SUN OCT 05 20:40:41 2014



SUN OCT 05 20:40:41 2014
      Time set from Primary SNTP server: tock.usno.navy.mil


SUN OCT 05 20:40:38 2014
      PPP CONNECTED on VPI 0 VCI 35 


SUN OCT 05 20:40:37 2014
      Connecting session(0): My Connection due to Manual Connect


SUN OCT 05 20:40:31 2014
      CWMP: Final Http Return Code = 0


SUN OCT 05 20:40:31 2014
      CWMP: Inform (0).  The following events are true: 4 VALUE CHANGE


SUN OCT 05 20:40:31 2014
      CWMP: TCP Not Connected, SSL Connection not requested, Auth Type = None


SUN OCT 05 20:40:29 2014
      Disconnecting session(-1):  due to PADT received


SUN OCT 05 20:40:29 2014
      Received PADT for session id 5738


SUN OCT 05 20:40:28 2014
      PPP DISCONNECTED on VPI 0 VCI 35 : PPP commanded down


SUN OCT 05 20:40:28 2014
      Disconnecting session(0): My Connection due to dsl Restart


SUN OCT 05 20:40:19 2014
      US Atten:     25.0 DS Atten:     28.5


SUN OCT 05 20:40:19 2014
      US Margin:     19.0 DS Margin:     26.0


SUN OCT 05 20:40:19 2014
      US Tx Power:     11.8 DS Tx Power:     16.0


SUN OCT 05 20:40:19 2014
      US DSL Rate:  448 kbits/sec DS DSL Rate:  928 kbits/sec


SUN OCT 05 20:40:19 2014
      WanMgr reports DSL is UP


SUN OCT 05 20:39:58 2014
      WanMgr reports DSL is Down


SUN OCT 05 20:39:00 2014
      CWMP: Final Http Return Code = 200


SUN OCT 05 20:35:03 2014
      Setting System clock to Daylight Savings Time SUN OCT 05 20:35:03 2014



SUN OCT 05 20:35:03 2014
      Time set from Primary SNTP server: tock.usno.navy.mil


SUN OCT 05 20:35:01 2014
      PPP CONNECTED on VPI 0 VCI 35 


SUN OCT 05 20:34:59 2014
      Connecting session(0): My Connection due to Manual Connect


SUN OCT 05 20:34:51 2014
      Disconnecting session(-1):  due to PADT received


SUN OCT 05 20:34:51 2014
      Received PADT for session id 5733


SUN OCT 05 20:34:50 2014
      PPP DISCONNECTED on VPI 0 VCI 35 : PPP commanded down


SUN OCT 05 20:34:50 2014
      Disconnecting session(0): My Connection due to dsl Restart


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Re: DSL frequent disconnects
cafox513
Enthusiast - Level 3

No solution -- same problem, but I've been having it for weeks at least, maybe longer.

Is there not a simple, single telephone number I could call to talk to a human being rather than an automated answerer that has no function but to delay Verizon's response?

This takes place when I use my MacBook Pro, and when I use my iPhone.

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Re: DSL frequent disconnects
drewko
Enthusiast - Level 1

I think it must be Verizon's fault. I am located only a few blocks from the CO and my noise margins are consistently very good, yet my down speed has dropped to 928 kbps from the 1184 kbps that i have consistently had in the past (going back several years.... yes, I save my transceiver stats.) . 

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Re: DSL frequent disconnects
smith6612
Community Leader
Community Leader

You have a line problem there. Your upstream attenuation should not be near equal to your downstream attenuation. That should be roughly half.

If you have voice service, have you noticed any degration in the quality of the audio? Any noise or static?

Also, what do your Transceiver Statistics look like from your NID? That line should be able to support 10+Mbps speeds.

Re: DSL frequent disconnects
drewko
Enthusiast - Level 1

Thanks, I didn't realize that about the attenuations.

Here are my transceiver stats at the NID:

Transceiver Revision: 7.2.3.0
Vendor ID Code: 4
Line Mode: G.DMT Mode
Data Path: Interleaved

Transceiver Information Downstream Path Upstream Path
DSL Speed (Kbits/Sec) 928 448
Margin (dB) 29.0 22.0
Line Attenuation (dB) 25.0 18.0
Transmit Power (dBm) 13.6 11.9

A bit of static on the voice set from time to time.

I have the 1 MBPS DSL service (or whatever the lowest category is now). I was usually getting 1148 Kbps download speed when it was working properly.

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Re: DSL frequent disconnects
cafox513
Enthusiast - Level 3

How can a simple citizen dig out these stats -- and understand them? I'm on a MacBook Pro with OS X (10.9.5). My Verizon modem is an Actiontec GT784WNV.

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Re: DSL frequent disconnects
smith6612
Community Leader
Community Leader

There's a methodology to understanding the statistics, but here is the basic breakdown.

Speed: What is shown here is the speed the line is operating at. You won't see this speed in real world tests since some of it is consumed by overhead from all the underlying communication protocols. What you see here, can change based upon provisioning and line conditions.

Margin: This is your signal to noise ratio (basically, how loud is the target comparison to backgorund noise). The higher the better.

Attenuation: This is how much the signal is degraded. Attenuation increases with line distance or as the line degrades. You can think of this as talking to someone far away or talking to someone far away through wind in both scenarios.

Power: This is how much power is needed to deliver the DSL signal.

Mode: This defines what type of ADSL technology is being used on the line. Typically, ADSL2+ is best as this is newer equipment capable of higher speeds and better reliability.

Data path: This shows whether error checking is enabled on the line or not. Error checking comes at the expense of your line latency (time in milliseconds for a packet of data to travel in or out through the modem.

In this case, the line statistics look better out at the NID. This means that there is likely a problem inside of the house. Some things can be done to improve the problem. First, all jacks and connected equipment should be checked to make sure the copper is securely connected, and not corroded or at risk of shorting. Second, DSL filters should be checked and potentially replaced if they are old or not installed on devices that are not a DSL modem. Third, if there are more than one DSL modems in the home, all but one modem should be removed from the line. Having multiple DSL modems connected can, and will cause problems.

Lastly, there are two things Verizon should do in this case. Since intermittent static is reported, Verizon should ensure that their end of the line is clean. Find a time where static is present on the call, and then call voice repair from a mobile phone. They should be able to run some initial tests to determine if a truck roll is needed to correct a problem (bad splice, bridge taps, crosstalk issues caused from crossed or degraded lines, etc). In addition, DSL support should be notified that you are having problems with the DSL. In many cases, you can ask Verizon for a Home Run; that is a dedicated line between your NID and your DSL modem, with the rest of the house filtered out at the NID. They will usually install these for free if you report problems.

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Re: DSL frequent disconnects
cafox513
Enthusiast - Level 3

No, Verizon has been teasing me and abusing me too long. I'm gone.

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