Page 3 of 4 FirstFirst 1234 LastLast
Results 41 to 60 of 80

Thread: Random disconnections from a Terayon TJ715x cable modem?

  1. #41
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/4/2008 9:27 AM PT, $Bill typed:

    >>> If indeed you exchange cable modems on Saturday, that should further
    >>> isolate the trouble for you. Remember to exchange the wall wart power
    >>> adapter too.

    >>
    >> Yeah, I have the whole box, cable modem, and power AC (why do I want
    >> to keep it?) to return. I haven't had any more disconnections and
    >> weirdness so far since I last posted. I just hope the new modem isn't
    >> defected and stuff. :P Funny how I got my cable bill yesterday so I
    >> will save a stamp today by paying them in person later today.

    >
    > If you own that modem, why return it ? If it at least works somewhat, it
    > gives a semi-workable spare.


    I don't own it. It was leased since Adelphia days (2005).
    --
    "Ants can attack with a grain of rice." --a Malagasy Proverb
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  2. #42
    $Bill
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    Ant wrote:
    >
    > I don't own it. It was leased since Adelphia days (2005).


    As Emily Litella would say: "Never mind".

  3. #43
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/4/2008 8:15 AM PT, Ant typed:

    >> If indeed you exchange cable modems on Saturday, that should further
    >> isolate the trouble for you. Remember to exchange the wall wart power
    >> adapter too.

    >
    > Yeah, I have the whole box, cable modem, and power AC (why do I want to
    > keep it?) to return. I haven't had any more disconnections and weirdness
    > so far since I last posted. I just hope the new modem isn't defected and
    > stuff. :P Funny how I got my cable bill yesterday so I will save a stamp
    > today by paying them in person later today.


    OK! I finally got the new modem (Ambit U10C018) working since 12:40 PM
    PDT. Man, it's tiny!

    The bad news. I think I got disconnected again like five minutes ago.
    Nothing odd in cable modem log:
    First Time Last Time Counts Level ID Text
    Sat Oct 04 20:10:48 2008 Sat Oct 04 20:10:48 2008 1 Warning (5)
    68010300 DHCP RENEW WARNING - Field invalid in response
    Time Not Established Time Not Established 1 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Time Not Established Time Not Established 2 Critical (3) 82000200
    No Ranging Response received - T3 time-out
    Time Not Established Time Not Established 1 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Time Not Established Time Not Established 1 Critical (3) 68000100
    DHCP FAILED - Discover sent, no offer received
    Time Not Established Time Not Established 2 Critical (3) 82000200
    No Ranging Response received - T3 time-out
    Time Not Established Time Not Established 15 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Time Not Established Time Not Established 1 Critical (3) 68000100
    DHCP FAILED - Discover sent, no offer received
    Time Not Established Time Not Established 1 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Thu May 15 00:12:10 2008 Thu May 15 00:12:10 2008 1 Critical (3)
    82000400 Received Response to Broadcast Maintenance Request, But no Un...
    Tue May 13 23:14:58 2008 Tue May 13 23:14:58 2008 1 Critical (3)
    82000500 Started Unicast Maintenance Ranging - No Response received - ...
    Time Not Established Time Not Established 7 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Time Not Established Time Not Established 1 Critical (3) 68000200
    DHCP FAILED - Request sent, No response
    Time Not Established Time Not Established 6 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Time Not Established Time Not Established 1 Critical (3) 68000200
    DHCP FAILED - Request sent, No response
    Time Not Established Time Not Established 3 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Wed Apr 30 01:02:25 2008 Wed Apr 30 01:02:25 2008 4 Critical (3)
    82000200 No Ranging Response received - T3 time-out
    Wed Apr 30 01:02:03 2008 Wed Apr 30 01:02:03 2008 1 Critical (3)
    82000400 Received Response to Broadcast Maintenance Request, But no Un...
    Wed Apr 30 01:01:31 2008 Wed Apr 30 01:01:31 2008 16 Critical (3)
    82000500 Started Unicast Maintenance Ranging - No Response received - ...
    Time Not Established Time Not Established 2 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Tue Apr 29 22:49:18 2008 Tue Apr 29 22:49:18 2008 8 Critical (3)
    82000200 No Ranging Response received - T3 time-out
    Tue Apr 29 22:48:10 2008 Tue Apr 29 22:48:10 2008 1 Critical (3)
    82000400 Received Response to Broadcast Maintenance Request, But no Un...
    Tue Apr 29 22:47:37 2008 Tue Apr 29 22:47:37 2008 12 Critical (3)
    82000500 Started Unicast Maintenance Ranging - No Response received - ...
    Time Not Established Time Not Established 72 Critical (3) 84000100
    SYNC Timing Synchronization failure - Failed to acquire QAM/Q...
    Time Not Established Time Not Established 85 Critical (3) 84000200
    SYNC Timing Synchronization failure - Failed to acquire FEC f...
    Time Not Established Time Not Established 17 Critical (3) 68000300
    DHCP WARNING - Non-critical field invalid in response.
    Mon Apr 14 00:10:52 2008 Mon Apr 14 00:10:52 2008 8 Critical (3)
    82000200 No Ranging Response received - T3 time-out
    Mon Apr 14 00:08:10 2008 Mon Apr 14 00:08:10 2008 1 Critical (3)
    82000400 Received Response to Broadcast Maintenance Request, But no Un...
    Mon Apr 14 00:07:37 2008 Mon Apr 14 00:07:37 2008 16 Critical (3)
    82000500 Started Unicast Maintenance Ranging - No Response received - ...
    Thu Apr 10 20:36:58 2008 Thu Apr 10 20:36:58 2008 1 Critical (3)
    68000300 DHCP WARNING - Non-critical field invalid in response.
    Thu Apr 10 20:35:26 2008 Thu Apr 10 20:35:26 2008 6 Critical (3)
    82000200 No Ranging Response received - T3 time-out
    Thu Apr 10 20:34:52 2008 Thu Apr 10 20:34:52 2008 1 Critical (3)
    82000400 Received Response to Broadcast Maintenance Request, But no Un...

    I guess I will have to another router or hook up the PC directly to the
    computer and see how that goes.
    --
    "They are like the ant... They start one way and turn around and go the
    other way... They look all the time at the ground and never see the
    sky." --Davi Kopenawa Yanomami, Amazonian Indian (Newsweek 117(17):5, 1991)
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  4. #44
    1PW
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/04/2008 01:26 PM, Ant sent:
    > On 10/4/2008 8:15 AM PT, Ant typed:
    >
    >>> If indeed you exchange cable modems on Saturday, that should further
    >>> isolate the trouble for you. Remember to exchange the wall wart power
    >>> adapter too.

    >>
    >> Yeah, I have the whole box, cable modem, and power AC (why do I want
    >> to keep it?) to return. I haven't had any more disconnections and
    >> weirdness so far since I last posted. I just hope the new modem isn't
    >> defected and stuff. :P Funny how I got my cable bill yesterday so I
    >> will save a stamp today by paying them in person later today.

    >
    > OK! I finally got the new modem (Ambit U10C018) working since 12:40 PM
    > PDT. Man, it's tiny!
    >


    Snip, snip...

    >
    > I guess I will have to another router or hook up the PC directly to the
    > computer and see how that goes.



    How is your replacement cable modem doing now?

    --
    1PW

    @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]

  5. #45
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    > > I guess I will have to another router or hook up the PC directly to the
    > > computer and see how that goes.


    > How is your replacement cable modem doing now?


    So far, it fixed my long desynchronizations I had on Friday so I gave
    up and swapped modems on Saturday. I could confirm that touching the
    coax cable connector to the cable modem would cause to desynch easily.
    Even if I don't touch it, it can do the same like on Friday. It doesn't
    feel lose. Did I mention that the coax cable connector's needle/pin is a
    little bent? I tried to unbent/straighten it, but it is a little bent. I
    don't know if this is related.

    After the cable modem swap, I haven't had those desynchronizations
    anymore. I only still have those quick annoying one second
    disconnections like with the old Terayon modem. I checked the modem's
    event logs and nothing odd (nor logged about those quick disconnections)
    from them.

    I still haven't been able to try the cable modem to a computer/notebook
    since others house members use my Internet even at late night hours.
    Since it takes 10-15 hours to reproduce the random quick
    disconnections, I need to wait when things are quiet (hopefully at the
    end of this month). I don't have another router to borrow to try either.
    --
    "May 10,000 ants never invade your underwear drawer." --unknown
    /\___/\
    / /\ /\ \ Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Please remove ANT if replying by e-mail.
    ( )

  6. #46
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/6/2008 11:51 AM PT, Ant typed:

    >>> I guess I will have to another router or hook up the PC directly to the
    >>> computer and see how that goes.

    >
    >> How is your replacement cable modem doing now?

    >
    > So far, it fixed my long desynchronizations I had on Friday so I gave
    > up and swapped modems on Saturday. I could confirm that touching the
    > coax cable connector to the cable modem would cause to desynch easily.
    > Even if I don't touch it, it can do the same like on Friday. It doesn't
    > feel lose. Did I mention that the coax cable connector's needle/pin is a
    > little bent? I tried to unbent/straighten it, but it is a little bent. I
    > don't know if this is related.
    >
    > After the cable modem swap, I haven't had those desynchronizations
    > anymore. I only still have those quick annoying one second
    > disconnections like with the old Terayon modem. I checked the modem's
    > event logs and nothing odd (nor logged about those quick disconnections)
    > from them.
    >
    > I still haven't been able to try the cable modem to a computer/notebook
    > since others house members use my Internet even at late night hours.
    > Since it takes 10-15 hours to reproduce the random quick
    > disconnections, I need to wait when things are quiet (hopefully at the
    > end of this month). I don't have another router to borrow to try either.


    Yep, it is confirmed that my old quick disconnection issue from my old
    Netgear RT311 router to the new Ambit cable modem remains:

    $ ping 192.168.100.1
    ....
    64 bytes from 192.168.100.1: icmp_seq=283 ttl=63 time=5.09 ms
    From 192.168.0.1 icmp_seq=284 Destination Host Unreachable
    From 192.168.0.1 icmp_seq=285 Destination Host Unreachable
    From 192.168.0.1 icmp_seq=286 Destination Host Unreachable
    From 192.168.0.1 icmp_seq=287 Destination Host Unreachable
    64 bytes from 192.168.100.1: icmp_seq=288 ttl=63 time=5.31 ms
    ....
    ^C
    --- 192.168.100.1 ping statistics ---
    711 packets transmitted, 707 received, +4 errors, 0% packet loss, time
    712845ms
    rtt min/avg/max/mdev = 4.713/7.099/159.370/11.875 ms

    Nothing in cable modem's Cable Modem Event Log page about the quick
    disconnections either.

    However... Yesterday, I had a couple long disconnections (a few minutes
    long) when I was not at home. I don't know if those were related to my
    quick disconnections or something else (hopefully just hiccups and
    haven't had anymore last night and today so far).
    --
    "Every ruler sleeps on an anthill." --Afghani
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  7. #47
    Junior Member
    Join Date
    Oct 2008
    Posts
    1

    Modem issues aswell

    OK I seem to be having a similar issue.. there are times when my modem works great for quite awhile but it seems it just intermittently drops. I have the same Terayon TJ715X and heres my log.. seems to be a little eh.. messy..

    Code:
    1970/01/01 00:00:49	85000200	1	Critical	UCD invalid or channel unusable - T4 timeout: Giving up on UCD 11.
    1970/01/01 00:02:54	82000200	12	Critical	No Ranging Response received - T3 time-out.
    2007/06/18 14:34:35	82000400	86	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2007/06/27 10:09:20	84000500	2	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2007/06/27 10:09:54	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2007/06/27 10:12:43	82000200	10	Critical	No Ranging Response received - T3 time-out.
    2007/06/27 11:03:14	84000500	1	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2007/06/27 11:03:39	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2007/06/27 11:04:52	82000200	1	Critical	No Ranging Response received - T3 time-out.
    2007/06/27 13:17:32	84000500	1	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2007/06/27 13:17:54	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2007/09/05 23:12:55	84000500	1	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2007/09/05 23:13:25	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    1970/01/01 00:00:08	82000200	2	Critical	No Ranging Response received - T3 time-out.
    1970/01/01 00:00:15	68000100	1	Critical	DHCP FAILED - Discover sent, no offer received - DHCP init timeout!
    2008/07/18 00:57:27	84000500	1	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2008/07/18 00:57:56	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2008/07/23 15:49:15	84000500	1	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2008/07/23 15:49:47	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    1970/01/01 00:01:13	82000200	9	Critical	No Ranging Response received - T3 time-out.
    2008/08/01 14:07:08	84000500	15	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2008/08/01 14:07:13	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2008/08/01 17:19:42	84000500	20	Critical	SYNC Timing Synchronization failure - Loss of Sync
    2008/08/14 00:15:18	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    2008/08/14 00:15:26	82000200	1	Critical	No Ranging Response received - T3 time-out.
    2008/08/14 02:51:32	82000400	1	Critical	Received Response to Broadcast Maintenance Request, But no Unicast Maintenance
    1970/01/01 00:00:09	82000200	15	Critical	No Ranging Response received - T3 time-out.
    1970/01/01 00:00:03	2242905932	1	Notice	SNMP Poll - Eth Link Up.
    2008/10/08 12:10:25	66010100	2	Error	Missing BP Configuration Setting TLV Type: 17.9
    2008/10/08 12:10:25	73040100	4	Notice	TLV-11 - unrecognized OID - (Num:102, MIB Object:enterprises.4115.1.3.1.1.1.1.
    2008/10/08 12:10:28	2242905917	1	Notice	SNMP Poll - Mac Link Up.
    2008/10/08 12:10:28	2242905786	1	Notice	SNMP Poll - DS Link Up.
    2008/10/08 12:10:28	2242905803	1	Notice	SNMP Poll - US Link Up.
    2008/10/08 12:10:28	2242905723	1	Notice	SNMP_AGENT_COLD_START

    Now it has alot of errors... can anyone tell me how to fix this short of getting a new one? Im currently running on wireless N through my Dlink DIR-655 with matching pci wireless card.. running at 300mbps.. Ive tried removing it from the equation on another PC but I still get same dropping issue.


    I have cleared the log before but it looks to me like its got a whole bunch of strange dates O.O anywho.. this is my edit.

    Also.. Heres my RF readings
    Code:
    Tx Power	50.0	dBmV
    Rx Power	3.5	dBmV
    Downstream SNR	33.3	dB
    Downstream MER	32.6	dB
    Tx Frequency	37500000	Hz
    Rx Frequency	651000000	Hz

  8. #48
    1PW
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/08/2008 07:47 AM, Ant sent:

    Snip, snip...

    > Nothing in cable modem's Cable Modem Event Log page about the quick
    > disconnections either.
    >
    > However... Yesterday, I had a couple long disconnections (a few minutes
    > long) when I was not at home. I don't know if those were related to my
    > quick disconnections or something else (hopefully just hiccups and
    > haven't had anymore last night and today so far).


    The R.F. side of the cable modem still has not been eliminated. This
    includes your house's coaxial cable, connector(s) and your service
    provider's outside plant.

    A methodical approach must be utilized when a failure occurs such that
    the downstream/receive signal level and downstream/receive SNR should be
    captured that coincides with the failures.

    I am still not absolutely sure that you have been able to log into your
    new/Ambit cable modem's web pages. Also, the issue of the house coaxial
    cable and its "F" connector didn't seem to have been ruled out.

    Can you relay any downstream signal/SNR levels? Do you still have
    Internet drop outs if the house coaxial cable/connector are slightly
    flexed at the rear of the Ambit cable modem?

    Pete

    --
    1PW

    @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]

  9. #49
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    > The R.F. side of the cable modem still has not been eliminated. This
    > includes your house's coaxial cable, connector(s) and your service
    > provider's outside plant.


    > A methodical approach must be utilized when a failure occurs such that
    > the downstream/receive signal level and downstream/receive SNR should be
    > captured that coincides with the failures.


    > I am still not absolutely sure that you have been able to log into your
    > new/Ambit cable modem's web pages. Also, the issue of the house coaxial
    > cable and its "F" connector didn't seem to have been ruled out.


    I can log in from GUI Web browsers like IE6 and Firefox. However, I keep
    missing the quick disconnections to check the statistics and I am
    minutes/hours too late. I wished there was a way to log the modem's
    statistics every minute like I did on my old modem. Darn modem using
    ASP or some funky Web pages to make Lynx and eLinks not render
    correctly. Same for logging in (401 errors) with Perl scripts.


    > Can you relay any downstream signal/SNR levels? Do you still have
    > Internet drop outs if the house coaxial cable/connector are slightly
    > flexed at the rear of the Ambit cable modem?


    I assume you want me to get the levels and other information right after
    a quick disconnection. If so, then I will have to try that right after
    (seconds later) those quick disconnects. What's more annoying,
    statistics are separated by Web pages and not all together like my last
    modem. Bah.

    What did you mean by flexed? Unscrew and losen the coax connection from
    the modem?
    --
    "May 10,000 ants never invade your underwear drawer." --unknown
    /\___/\
    / /\ /\ \ Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Please remove ANT if replying by e-mail.
    ( )

  10. #50
    $Bill
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    Ant wrote:
    >
    > I assume you want me to get the levels and other information right after
    > a quick disconnection. If so, then I will have to try that right after
    > (seconds later) those quick disconnects. What's more annoying,
    > statistics are separated by Web pages and not all together like my last
    > modem. Bah.
    >
    > What did you mean by flexed? Unscrew and losen the coax connection from
    > the modem?


    I'd go call them and ask if the cable office has any other brand that
    you might find more conducive to polling. Maybe another Terayon.

  11. #51
    Bill M.
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On Wed, 08 Oct 2008 16:50:34 -0500, ANTant@zimage.com (Ant) wrote:

    >I can log in from GUI Web browsers like IE6 and Firefox. However, I keep
    >missing the quick disconnections to check the statistics and I am
    >minutes/hours too late.


    Do you still have reason to believe you're having a modem/RF problem?
    I haven't been following the thread that closely, but I thought you
    replaced the modem and still suffer from short term disconnections,
    which would lead me to believe the problem is elsewhere.

    >What did you mean by flexed? Unscrew and losen the coax connection from
    >the modem?


    Flex = bend, as in slightly bend, to see if there is a loose
    connection.

    --
    Bill

  12. #52
    1PW
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/08/2008 04:10 PM, Bill M. sent:
    > On Wed, 08 Oct 2008 16:50:34 -0500, ANTant@zimage.com (Ant) wrote:
    >
    >> I can log in from GUI Web browsers like IE6 and Firefox. However, I keep
    >> missing the quick disconnections to check the statistics and I am
    >> minutes/hours too late.

    >
    > Do you still have reason to believe you're having a modem/RF problem?
    > I haven't been following the thread that closely, but I thought you
    > replaced the modem and still suffer from short term disconnections,
    > which would lead me to believe the problem is elsewhere.


    Yes, his cable modem has been exchanged. However, the quality of the
    present Ambit U10C018 is an unknown quantity. Personally I have received
    multiple intermittently failing replacement equipment from my own
    service provider until I announced my intentions to discontinue my
    patronage with any more failed units. Only at that point was an obvious
    brand new unit placed in my hands. No more failures then.

    >
    >> What did you mean by flexed? Unscrew and loosen the coax connection from
    >> the modem?

    >
    > Flex = bend, as in slightly bend, to see if there is a loose
    > connection.
    >


    The reason for the mild flexing is that a failure was noted when the OP
    touched the coax and/or "F" connector at the Terayon cable modem. It
    isn't totally clear if this has ceased with the Ambit. The premises
    cabling goes back to 2000 and it's undetermined if the cable lengths,
    and coax/connector, are well rated or are sufficient for 705 GHz data
    service. I'm trying my best to assist our OP in determining the point
    of failure without having him to schedule/pay for an ISP technician
    calls or an electrician to run known quality RG6 from the demarc to the
    cable modem. ...and of course the ISP's local outside plant cabling is
    an unknown quantity too, at this time.

    The OP's previous posts have shown marginal downstream SNRs (29 dB) that
    vary 4 dB and possibly more.

    Pete

    --
    1PW

    @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]

  13. #53
    1PW
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/08/2008 02:50 PM, Ant sent:
    >> The R.F. side of the cable modem still has not been eliminated. This
    >> includes your house's coaxial cable, connector(s) and your service
    >> provider's outside plant.

    >
    >> A methodical approach must be utilized when a failure occurs such that
    >> the downstream/receive signal level and downstream/receive SNR should be
    >> captured that coincides with the failures.

    >
    >> I am still not absolutely sure that you have been able to log into your
    >> new/Ambit cable modem's web pages. Also, the issue of the house coaxial
    >> cable and its "F" connector didn't seem to have been ruled out.

    >
    > I can log in from GUI Web browsers like IE6 and Firefox. However, I keep
    > missing the quick disconnections to check the statistics and I am
    > minutes/hours too late. I wished there was a way to log the modem's
    > statistics every minute like I did on my old modem. Darn modem using
    > ASP or some funky Web pages to make Lynx and eLinks not render
    > correctly. Same for logging in (401 errors) with Perl scripts.
    >
    >
    >> Can you relay any downstream signal/SNR levels? Do you still have
    >> Internet drop outs if the house coaxial cable/connector are slightly
    >> flexed at the rear of the Ambit cable modem?

    >
    > I assume you want me to get the levels and other information right after
    > a quick disconnection. If so, then I will have to try that right after
    > (seconds later) those quick disconnects. What's more annoying,
    > statistics are separated by Web pages and not all together like my last
    > modem. Bah.


    All the immediately interesting readings are on the "Downstream" page.

    Although an ideal reading of the Downstream signal level, and SNR, would
    be in the midst of a failure, I realize how difficult this may be
    without a running script. For right now, lets have you take an
    instantaneous reading and relay that. It wouldn't hurt to take just the
    downstream signal level and downstream SNR readings hourly or every two
    hours or so. We need to establish some kind of a new baseline since the
    Ambit modem is now in play. This is important!

    >
    > What did you mean by flexed? Unscrew and loosen the coax connection from
    > the modem?


    When you installed the Ambit modem, you screwed the house R.F. cable to
    the replacement Ambit modem and tightened its connector, with a 7/16"
    open-end wrench or its equivalent, such that the cable's "F" connector
    is *slightly* more than finger tight. Now you should be able to observe
    your systems when you ever so *slightly* bend the R.F. cable back and
    forth taking note whether anything fails. We are looking for an
    intermittent connection - either in the cable, at the connector, or in
    the cable modem at the coax connector.

    Pete

    --
    1PW

    @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]

  14. #54
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/8/2008 2:59 PM PT, $Bill typed:

    >> I assume you want me to get the levels and other information right after
    >> a quick disconnection. If so, then I will have to try that right after
    >> (seconds later) those quick disconnects. What's more annoying,
    >> statistics are separated by Web pages and not all together like my last
    >> modem. Bah.
    >>
    >> What did you mean by flexed? Unscrew and losen the coax connection
    >> from the modem?

    >
    > I'd go call them and ask if the cable office has any other brand that
    > you might find more conducive to polling. Maybe another Terayon.


    I did ask for Motorola since someone told me that it was a good brand,
    but the gal said no and she said Ambit was the only one.
    --
    "Ah. Those club kids did eat those ants up like popcorn." --CSI: Miami
    (Wannabe episode; #218)
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  15. #55
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/8/2008 4:10 PM PT, Bill M. typed:

    > On Wed, 08 Oct 2008 16:50:34 -0500, ANTant@zimage.com (Ant) wrote:
    >
    >> I can log in from GUI Web browsers like IE6 and Firefox. However, I keep
    >> missing the quick disconnections to check the statistics and I am
    >> minutes/hours too late.

    >
    > Do you still have reason to believe you're having a modem/RF problem?
    > I haven't been following the thread that closely, but I thought you
    > replaced the modem and still suffer from short term disconnections,
    > which would lead me to believe the problem is elsewhere.


    I assume it is not the modem since the symptoms are the same like my old
    Terayon cable modem from 2005. Someone suggested to try without my old
    Netgear RT311 router with a direct connection (have to wait for other
    house members not to use the Internet much) or another router (might be
    able to get an used Linksys to test it). I already tried different cat5
    cables (new vs. old) between the router and cable modems.


    >> What did you mean by flexed? Unscrew and losen the coax connection from
    >> the modem?

    >
    > Flex = bend, as in slightly bend, to see if there is a loose
    > connection.


    I flexxed/bented the cable part 360 degrees in circle (didn't force it
    hard) while holding the modem so it won't move. It didn't disconnect me.
    I checked my cable modem's logs to verify (no errors).
    --
    "What do ants and bees use for cattle?" --Tom
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  16. #56
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/8/2008 7:59 PM PT, 1PW typed:

    > Yes, his cable modem has been exchanged. However, the quality of the
    > present Ambit U10C018 is an unknown quantity. Personally I have received
    > multiple intermittently failing replacement equipment from my own
    > service provider until I announced my intentions to discontinue my
    > patronage with any more failed units. Only at that point was an obvious
    > brand new unit placed in my hands. No more failures then.


    Mine looks new, but how can I be sure that it is not refurbished, used,
    etc.? I noticed the logs said defaults used or something (cleared the
    logs a few days ago so I can't paste what I saw).


    >>> What did you mean by flexed? Unscrew and loosen the coax connection from
    >>> the modem?

    >> Flex = bend, as in slightly bend, to see if there is a loose
    >> connection.
    >>

    >
    > The reason for the mild flexing is that a failure was noted when the OP
    > touched the coax and/or "F" connector at the Terayon cable modem. It


    That issue seems to be gone (it better be) hence forced me to swap
    modems. I just have these random quick disconnections (1 second long). I
    don't know what yesterday's longer disconnections were. They might have
    been something else.


    > isn't totally clear if this has ceased with the Ambit. The premises
    > cabling goes back to 2000 and it's undetermined if the cable lengths,


    3/10/2001 according to my original Excite@Home Adelphia contract. :)
    Yep, it was that long ago. Oy, that cable service was horrible back
    then. Much worse than I am going through because everything on their
    side for the whole city (not DOCSIS!) until 2003(?), Adelphia upgraded
    the cable infrastrucutre in the city.


    > and coax/connector, are well rated or are sufficient for 705 GHz data
    > service. I'm trying my best to assist our OP in determining the point
    > of failure without having him to schedule/pay for an ISP technician
    > calls or an electrician to run known quality RG6 from the demarc to the
    > cable modem. ...and of course the ISP's local outside plant cabling is
    > an unknown quantity too, at this time.


    When you say plant, is that the little green box in the ground? If so,
    then there's one across the street from where I am.


    > The OP's previous posts have shown marginal downstream SNRs (29 dB) that
    > vary 4 dB and possibly more.


    Here are my current statistics (haven't been disconnected since before
    7:47 AM PDT, and I am sure another one is soon [12-15 hours usually]):

    Cable Modem Information
    Cable Modem : DOCSIS 1.0/1.1/2.0 Compliant
    MAC Address : [snipped]
    Serial Number : [snipped]
    Boot Code Version : 2.1.6d
    Software Version : 2.93.1008
    Hardware Version : 1.20

    Cable Modem Status
    Item Status Comments
    Acquire a Downstream Channel 705000000 Hz Locked
    Connectivity State OK Operational
    Boot State OK Operational
    Security Enabled BPI+

    Cable Modem Downstream
    Downstream Lock : Locked
    Downstream Channel Id : 71
    Downstream Frequency :
    Downstream Modulation : QAM256
    Downstream Symbol Rate : 5360537
    Downstream Interleave Depth : 32
    Downstream Receive Power Level : -1.5 dBmV
    Downstream SNR : 34.4 dB

    Cable Modem Upstream
    Upstream Lock : Locked
    Upstream Channel ID : 7
    Upstream Frequency :
    Upstream Modulation : QAM16
    Upstream Symbol Rate : 2560 Ksym/sec
    Upstream transmit Power Level : 39.0 dBmV
    Upstream Mini-Slot Size : 4

    Cable Modem Upstream Burst
    REQ Init Per Short Long
    Maint Maint Data Data
    (1) (3) (4) (5) (6)
    Modulation Type QPSK QPSK QPSK 16QAM 16QAM
    Differential Encoding Off Off Off Off Off
    Preamble Length 64 640 384 168 192
    Preamble Value Offset 652 0 0 720 720
    FEC Error Correction (T) 0 5 5 6 8
    FEC Codeword Information Bytes (k) 16 34 34 78 220
    Scrambler Seed 338 338 338 338 338
    Maximum Burst Size 0 0 0 23 255
    Guard Time Size 8 48 48 8 8
    Last Codeword Length Fixed Fixed Fixed Short Short
    Scrambler on/off On On On On On

    Cable Modem Operation Configuration
    Network Access : Allowed
    Maximum Downstream Data Rate : 0
    Maximum Upstream Data Rate : 0
    Maximum Upstream Channel Burst : 0
    Maximum Number of CPEs : 1
    Modem Capability : Concatenation Enabled, Fragametation Enabled, PHS
    Enabled

    Cable Modem Event Log is empty (cleared it recently to start new).

    Oy! Copying, pasting, and tweaking is annoying from seven ASP Web pages.
    I think I am going to do screen captures next time.

    See anything interesting? I noticed this Ambit modem provides more
    details than my previous modems. I guess that's good for us to have more
    details?
    --
    "... Our latest evil plan and create an army of giant ants to take over
    the galaxy..." --Dark Helmet from Spaceballs: The Animated Series (S1 E3).
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  17. #57
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/8/2008 10:44 PM PT, Ant typed:

    > Here are my current statistics (haven't been disconnected since before
    > 7:47 AM PDT, and I am sure another one is soon [ever 12-15 hours usually]):


    HA! A few minutes later after my post, I got disconnected again. I think
    it is watching me. :P I think I got the datas within five minutes after
    the quick disconnection:
    http://img80.imageshack.us/img80/4871/10082008fq3.gif for screen
    captures (I tried to collect fast as I could!).
    --
    "The tiny ant dares to enter the lion's ear." --Armenian
    /\___/\
    / /\ /\ \ Phil/Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Remove ANT from e-mail address: philpi@earthlink.netANT
    ( ) or ANTant@zimage.com
    Ant is currently not listening to any songs on his home computer.

  18. #58
    1PW
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/08/2008 10:44 PM, Ant sent:
    > On 10/8/2008 7:59 PM PT, 1PW typed:
    >
    >> Yes, his cable modem has been exchanged. However, the quality of the
    >> present Ambit U10C018 is an unknown quantity. Personally I have received
    >> multiple intermittently failing replacement equipment from my own
    >> service provider until I announced my intentions to discontinue my
    >> patronage with any more failed units. Only at that point was an obvious
    >> brand new unit placed in my hands. No more failures then.

    >
    > Mine looks new, but how can I be sure that it is not refurbished, used,
    > etc.? I noticed the logs said defaults used or something (cleared the
    > logs a few days ago so I can't paste what I saw).
    >
    >
    >>>> What did you mean by flexed? Unscrew and loosen the coax connection
    >>>> from the modem?
    >>> Flex = bend, as in slightly bend, to see if there is a loose
    >>> connection.
    >>>

    >>
    >> The reason for the mild flexing is that a failure was noted when the OP
    >> touched the coax and/or "F" connector at the Terayon cable modem. It

    >
    > That issue seems to be gone (it better be) hence forced me to swap
    > modems. I just have these random quick disconnections (1 second long). I
    > don't know what yesterday's longer disconnections were. They might have
    > been something else.
    >
    >
    >> isn't totally clear if this has ceased with the Ambit. The premises
    >> cabling goes back to 2000 and it's undetermined if the cable lengths,

    >
    > 3/10/2001 according to my original Excite@Home Adelphia contract. :)
    > Yep, it was that long ago. Oy, that cable service was horrible back
    > then. Much worse than I am going through because everything on their
    > side for the whole city (not DOCSIS!) until 2003(?), Adelphia upgraded
    > the cable infrastructure in the city.
    >
    >
    >> and coax/connector, are well rated or are sufficient for 705 GHz data
    >> service. I'm trying my best to assist our OP in determining the point
    >> of failure without having him to schedule/pay for an ISP technician
    >> calls or an electrician to run known quality RG6 from the demarc to the
    >> cable modem. ...and of course the ISP's local outside plant cabling is
    >> an unknown quantity too, at this time.

    >
    > When you say plant, is that the little green box in the ground? If so,
    > then there's one across the street from where I am.


    In broad brush strokes, I'm using some terms from my own earlier career.
    Loosely speaking, inside plant would be any and all equipment your
    service provider has before the signals leave their building(s).

    <http://en.wikipedia.org/wiki/Inside_plant>

    Again, in the loosest of terminologies, outside plant is the equipment
    outside /their/ main building(s) that conveys the signals from them
    towards your demarcation point.

    <http://en.wikipedia.org/wiki/Outside_plant>

    "the little green box in the ground" if it contains any of your
    provider's equipment, is part of their outside plant.

    The demarcation point, or demarc, is somewhat legal and technical. It's
    typically (not always) in/on your property. Equipment on your side of
    the demarc is the rate payer's/subscriber's/patron's responsibility.
    Even if the original cable company installed your home's coaxial
    cabling, you could/should bear the expense of maintenance. This is
    an *extremely* gray area. Many cable companies want you to maintain any
    and all equipment on your side of the demarc. However, the cable
    company techs may be permitted to run new or replace old cabling just to
    make the customer happy. However, just as often, the cable company
    techs will direct you to use the services of an electrician or imply
    that you can DIY.

    >> The OP's previous posts have shown marginal downstream SNRs (29 dB) that
    >> vary 4 dB and possibly more.

    >
    > Here are my current statistics (haven't been disconnected since before
    > 7:47 AM PDT, and I am sure another one is soon [12-15 hours usually]):


    Snipped


    > Cable Modem Downstream
    > Downstream Lock : Locked
    > Downstream Channel Id : 71
    > Downstream Frequency :
    > Downstream Modulation : QAM256
    > Downstream Symbol Rate : 5360537
    > Downstream Interleave Depth : 32
    > Downstream Receive Power Level : -1.5 dBmV
    > Downstream SNR : 34.4 dB


    Snipped

    > Cable Modem Event Log is empty (cleared it recently to start new).


    I would *not* have done this. You may wish to rethink this if you
    are tempted to do this again.

    >
    > Oy! Copying, pasting, and tweaking is annoying from seven ASP Web pages.
    > I think I am going to do screen captures next time.
    >
    > See anything interesting? I noticed this Ambit modem provides more
    > details than my previous modems. I guess that's good for us to have more
    > details?


    At the time you took this snapshot of conditions, the "Downstream
    Receive Power Level : -1.5 dBmV" is excellent by almost any
    standard. Loosely speaking, 0 dBmV is the ideal with a +/- 12 dBmV
    range of acceptability.

    The "Downstream SNR : 34.4 dB" is acceptable. For QAM256
    modulation, a number more positive than 33.0 dB is OK. Would be nicer
    if this was more positive than 35 dB. These numbers will vary with time
    of day, temperature and many factors in, but mostly out of your control.
    When your downstream SNR was 29.0 dB, technically this was 4 dB in the
    bad area. Keep monitoring this! I am suspicious that this condition
    might yet return!

    --
    1PW

    @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]

  19. #59
    1PW
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    On 10/08/2008 11:04 PM, Ant sent:
    > On 10/8/2008 10:44 PM PT, Ant typed:
    >
    >> Here are my current statistics (haven't been disconnected since before
    >> 7:47 AM PDT, and I am sure another one is soon [ever 12-15 hours
    >> usually]):

    >
    > HA! A few minutes later after my post, I got disconnected again. I think
    > it is watching me. :P I think I got the data within five minutes after
    > the quick disconnection:
    > http://img80.imageshack.us/img80/4871/10082008fq3.gif for screen
    > captures (I tried to collect fast as I could!).


    At the instant of this failure, was your Netgear RT311 router part of
    the overall configuration?

    --
    1PW

    @?6A62?FEH9:DE=6o2@=]4@> [r4o7t]

  20. #60
    Ant
    Guest

    Re: Random disconnections from a Terayon TJ715x cable modem?

    > I would *not* have done this. You may wish to rethink this if you
    > are tempted to do this again.


    OK. I was trying to keep my logs clean. The list is messy since they are
    not sorted chronologically.

    > > Oy! Copying, pasting, and tweaking is annoying from seven ASP Web
    > > pages. I think I am going to do screen captures next time.


    > >
    > > See anything interesting? I noticed this Ambit modem provides more
    > > details than my previous modems. I guess that's good for us to have more
    > > details?


    > At the time you took this snapshot of conditions, the "Downstream
    > Receive Power Level : -1.5 dBmV" is excellent by almost any
    > standard. Loosely speaking, 0 dBmV is the ideal with a +/- 12 dBmV
    > range of acceptability.


    > The "Downstream SNR : 34.4 dB" is acceptable. For QAM256
    > modulation, a number more positive than 33.0 dB is OK. Would be nicer
    > if this was more positive than 35 dB. These numbers will vary with time
    > of day, temperature and many factors in, but mostly out of your control.
    > When your downstream SNR was 29.0 dB, technically this was 4 dB in the
    > bad area. Keep monitoring this! I am suspicious that this condition
    > might yet return!


    Will do. Here's one as I type this post:

    Cable Modem Downstream

    Downstream Lock : Locked
    Downstream Channel Id : 71
    Downstream Frequency :
    Downstream Modulation : QAM256
    Downstream Symbol Rate : 5360537
    Downstream Interleave Depth : 32
    Downstream Receive Power Level : -1.9 dBmV
    Downstream SNR : 35.0 dB


    Haven't had any more disconnections since I mentioned last night.
    --
    "May 10,000 ants never invade your underwear drawer." --unknown
    /\___/\
    / /\ /\ \ Ant @ http://antfarm.home.dhs.org (Personal Web Site)
    | |o o| | Ant's Quality Foraged Links (AQFL): http://aqfl.net
    \ _ / Please remove ANT if replying by e-mail.
    ( )

Similar Threads

  1. Cable modem keeps losing connection
    By zodiac88 in forum General Broadband Forum
    Replies: 5
    Last Post: 01-28-09, 02:27 AM
  2. Cable modem keeps dropping signal
    By Stevis50 in forum General Broadband Forum
    Replies: 12
    Last Post: 04-24-08, 12:12 PM
  3. Replies: 4
    Last Post: 10-22-07, 09:11 PM
  4. Zoom X6 5590 and Cable Modem WAN connection
    By VirtualFM in forum Wireless Networks & Routers
    Replies: 2
    Last Post: 09-21-07, 12:18 PM
  5. cable modem Xbox 360
    By GottiJr in forum General Broadband Forum
    Replies: 7
    Last Post: 04-21-07, 04:50 PM

Bookmarks

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •