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Intermittent DSL Connection Drop Outs
caperail
Newbie
‎05-03-2015 07:54 PM

For over a month now I've been experiencing intermittent connectivity issues with my Verizon DSL service.  When it occurs, the DSL light will flash, and then after a short time the connection will be re-established and the DSL light will go solid once again.  Sometimes it happens several times each minute, other times it can go hours without issue.  It seems possible that it occurs more frequently at night, but I'm not certain that's the case as I'm not always home during the daytime. 

I have spoken with tech support on 3 occasions now, with varying results.  Initially after some troubleshooting I was sent a replacement modem (Actiontec GT784WNV), but unfortunately that didn't solve the issue.  The next time I called, after many line tests, unplugging all other phones, etc. I was able to schedule an appointment for a technician.  In the mean time I proceeded to install a new phone jack and splitter where the modem is located, to rule that out. 

Unfortunately I had to cancel that appointment, and when I contacted tech support last night hoping to reschedule, they ran line tests and told me there was no need for a technician.  However, they said something interesting, which was that they thought my line was unable to handle the speed/load which I'm signed up for.  They suggested I contact sales to downgrade my plan.  This frustrates me if it's really the only solution...I've been on this "enhanced" plan for some time and the fact that the connectivity issues only began fairly recently make me question that. 

At any rate, below are the stats from the modem.  If there is additional information which I can access/post, just let me know.  Thanks, in advance, for any advice that can be provided.

VPI:0
VCI:35
Broadband Mode Setting:ADSL2+
Broadband Negotiated Mode:ADSL2+
Connection Status:CONNECTED
Downstream Speed:11767 Kbps
Upstream Speed:1041 Kbps
Retrains:26
Retrain Timer:0 Days, 0H:4M:9S
ATM QoS class:UBR
Near End CRC Errors Interleave:45618
Near End CRC Errors Fastpath :N/A
Far End CRC Errors Interleave :0
Far End CRC Errors Fastpath :N/A
30 Minute Near End CRC Interleave :0
30 Minute Near End CRC Fastpath :N/A
30 Minute Far End CRC Interleave :0
30 Minute Far End CRC Fastpath :N/A
Near End RS FEC Interleave :0
Near End RS FEC Fastpath :N/A
Far End RS FEC Interleave :0
Far End RS FEC Fastpath :N/A
30 Minute Near End FEC Interleave :1529719
30 Minute Near End FEC Fastpath :N/A
30 Minute Far End FEC Interleave :0
30 Minute Far End FEC Fastpath :N/A
30 Minute Discarded Packets Downstream :0
30 Minute Discarded Packets Upstream :0
SNR Downstream :9 dB
SNR Upstream :9 dB
Attenuation Downstream :32 dB
Attenuation Upstream :14 dB
Power Downstream21.2 dBm
Power Upstream

12.3 dBm

In addition, in case it's of any use, here's a sample of the system log from the past half hour or so, during which time it has dropped several times in a row:

05/03/201510:21:02 PMkernel[<8001a358>] 0x8001a358
05/03/201510:21:02 PMkernel[<80010424>] 0x80010424
05/03/201510:21:02 PMkernel[<8001a350>] 0x8001a350
05/03/201510:21:02 PMkernel[] 0xc00ee66c
05/03/201510:21:02 PMkernel[] 0xc00f26cc
05/03/201510:21:02 PMkernel[] 0xc00f4d60
05/03/201510:21:02 PMkernel[] 0xc00f6a54
05/03/201510:21:02 PMkernel[<80034124>] 0x80034124
05/03/201510:21:02 PMkernel[<800176a4>] 0x800176a4
05/03/201510:21:02 PMkernel[<8003d920>] 0x8003d920
05/03/201510:21:02 PMkernel[<80017784>] 0x80017784
05/03/201510:21:02 PMkernel[<8003de34>] 0x8003de34
05/03/201510:21:02 PMkernel[<8003dc9c>] 0x8003dc9c
05/03/201510:21:02 PMkernel[<8003dc9c>] 0x8003dc9c
05/03/201510:21:02 PMkernel[<8003dc9c>] 0x8003dc9c
05/03/201510:21:02 PMkernel[<800504a8>] 0x800504a8
05/03/201510:21:02 PMkernel[<8001b25c>] 0x8001b25c
05/03/201510:21:02 PMkernel 
05/03/201510:21:02 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:21:02 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1059000, DS=11445000
05/03/201510:21:59 PMkernelLine 0: ADSL link down
05/03/201510:21:59 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = DOWN, Service Support = ATM
05/03/201510:21:59 PMkernelHOST XTM Tx ch 0 down success
05/03/201510:21:59 PMkernelbcmxtmcfg: Connection DOWN, LinkActiveStatus=0x0
05/03/201510:22:01 PMkernelLine 0: xDSL G.994 training
05/03/201510:22:11 PMkernelLine 0: ADSL G.992 started
05/03/201510:22:16 PMkernelLine 0: ADSL G.992 channel analysis
05/03/201510:22:20 PMkernelLine 0: ADSL G.992 message exchange
05/03/201510:22:21 PMkernelLine 0: ADSL link up, Bearer 0, us=1056, ds=11445
05/03/201510:22:21 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = UP, Service Support = ATM
05/03/201510:22:21 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:22:21 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1056000, DS=11445000
05/03/201510:23:02 PMkernelLine 0: ADSL link down
05/03/201510:23:02 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = DOWN, Service Support = ATM
05/03/201510:23:02 PMkernelHOST XTM Tx ch 0 down success
05/03/201510:23:02 PMkernelbcmxtmcfg: Connection DOWN, LinkActiveStatus=0x0
05/03/201510:23:04 PMkernelLine 0: xDSL G.994 training
05/03/201510:23:14 PMkernelLine 0: ADSL G.992 started
05/03/201510:23:19 PMkernelLine 0: ADSL G.992 channel analysis
05/03/201510:23:23 PMkernelLine 0: ADSL G.992 message exchange
05/03/201510:23:24 PMkernelLine 0: ADSL link up, Bearer 0, us=1045, ds=11445
05/03/201510:23:24 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = UP, Service Support = ATM
05/03/201510:23:24 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:23:24 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1045000, DS=11445000
05/03/201510:23:56 PMkernelLine 0: ADSL link down
05/03/201510:23:56 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = DOWN, Service Support = ATM
05/03/201510:23:56 PMkernelHOST XTM Tx ch 0 down success
05/03/201510:23:56 PMkernelbcmxtmcfg: Connection DOWN, LinkActiveStatus=0x0
05/03/201510:23:57 PMkernelLine 0: xDSL G.994 training
05/03/201510:24:08 PMkernelLine 0: ADSL G.992 started
05/03/201510:24:12 PMkernelLine 0: ADSL G.992 channel analysis
05/03/201510:24:17 PMkernelLine 0: ADSL G.992 message exchange
05/03/201510:24:18 PMkernelLine 0: ADSL link up, Bearer 0, us=1052, ds=11445
05/03/201510:24:18 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = UP, Service Support = ATM
05/03/201510:24:18 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:24:18 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1052000, DS=11445000
05/03/201510:24:53 PMkernelLine 0: ADSL link down
05/03/201510:24:53 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = DOWN, Service Support = ATM
05/03/201510:24:53 PMkernelHOST XTM Tx ch 0 down success
05/03/201510:24:53 PMkernelbcmxtmcfg: Connection DOWN, LinkActiveStatus=0x0
05/03/201510:24:55 PMkernelLine 0: xDSL G.994 training
05/03/201510:24:56 PM -- MARK --
05/03/201510:25:05 PMkernelLine 0: ADSL G.992 started
05/03/201510:25:10 PMkernelLine 0: ADSL G.992 channel analysis
05/03/201510:25:14 PMkernelLine 0: ADSL G.992 message exchange
05/03/201510:25:15 PMkernelLine 0: ADSL link up, Bearer 0, us=1067, ds=11555
05/03/201510:25:15 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = UP, Service Support = ATM
05/03/201510:25:15 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:25:15 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1067000, DS=11555000
05/03/201510:25:48 PMkernelLine 0: ADSL link down
05/03/201510:25:48 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = DOWN, Service Support = ATM
05/03/201510:25:48 PMkernelHOST XTM Tx ch 0 down success
05/03/201510:25:48 PMkernelbcmxtmcfg: Connection DOWN, LinkActiveStatus=0x0
05/03/201510:25:50 PMkernelLine 0: xDSL G.994 training
05/03/201510:26:00 PMkernelLine 0: ADSL G.992 started
05/03/201510:26:05 PMkernelLine 0: ADSL G.992 channel analysis
05/03/201510:26:09 PMkernelLine 0: ADSL G.992 message exchange
05/03/201510:26:10 PMkernelLine 0: ADSL link up, Bearer 0, us=1070, ds=11552
05/03/201510:26:10 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = UP, Service Support = ATM
05/03/201510:26:10 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:26:10 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1070000, DS=11552000
05/03/201510:26:41 PMkernelLine 0: ADSL link down
05/03/201510:26:41 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = DOWN, Service Support = ATM
05/03/201510:26:41 PMkernelHOST XTM Tx ch 0 down success
05/03/201510:26:41 PMkernelbcmxtmcfg: Connection DOWN, LinkActiveStatus=0x0
05/03/201510:26:43 PMkernelLine 0: xDSL G.994 training
05/03/201510:26:54 PMkernelLine 0: ADSL G.992 started
05/03/201510:26:58 PMkernelLine 0: ADSL G.992 channel analysis
05/03/201510:27:03 PMkernelLine 0: ADSL G.992 message exchange
05/03/201510:27:03 PMkernelLine 0: ADSL link up, Bearer 0, us=1041, ds=11767
05/03/201510:27:03 PMkernelbcmxtmcfg: XTM Link Information, port = 0, State = UP, Service Support = ATM
05/03/201510:27:03 PMkernelXTM Init: 400 tx BDs at 0xa2ed6000
05/03/201510:27:03 PMkernelbcmxtmcfg: Connection UP, LinkActiveStatus=0x1, US=1041000, DS=11767000
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2 Replies
Correct answers are available for this post.
Re: Intermittent DSL Connection Drop Outs
smith6612
Super User
Super User
‎05-04-2015 06:27 AM

Do you remmber any sort of storm coming through since the problem began that might have damaged the line? Alternatively have any changes been made to your telephone line as to what devices are plugged in or the wiring?

Do you have a home run (a dedicated wire pair run from your NID just for your modem, and the rest of your home resides behind a DSL splitter at the NID) installed? At higher speeds it's recommended to have one of these installed to help rule out any variance that could be causes by devices in your home. 

Your line has good attenuation although the error counts are high and noise margin is low. I would say that with some work you could keep the 10M rate and have it stable. Start off by installing a home run if you don't have one. Verizon can help install one for you, usually free of charge if you're reporting DSL trouble. If that doesn't help then have a tech come out and analyze the line for signal problems. It might take a few visits to find.

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Re: Intermittent DSL Connection Drop Outs
caperail
Newbie
‎05-07-2015 05:50 PM
Thanks for your reply. There was a lightning stike a couple of years ago right outside the house that fried the cordless telephone base, my fax/printer and the DSL modem. Once the modem was replaced I hadn't experienced any issues until recently. Are you theorizing the wiring inside my house could be damaged, or Verizon's wire outside? I will try running a dedicated home run to the modem...that won't be difficult for me at all. Where would I obtain a whole house DSL filter for the other devices, or should I just leave the existing individual filters in place?

Thanks again for your help.
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