[HSI] Connection Keeps dropping too..

[HSI] Connection Keeps dropping too..
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Forums » US Cable Support » Charter HSI/CATV » [HSI] Connection Keeps dropping too..

johnt519 @ 29th Oct 08:58AM:
[HSI] Connection Keeps dropping too..

(posted in the Charter Direct forum also...)

Several times a night my connection keeps dropping. I'll be going along fine, then whether I'm in a game, or talking to people or just surfing I see I have no response. Looking at the cable modem I'll see the ready light go out, then start flashing. I usually have to unplug and plug it back in and hope it reconnects. I'm including the logs and signal levels, which according to specs I've seen are well with limits. It is an Ambit modem. It coincidently seems to have started after Charter started their "Powerboost" thing...

The other thing I notice, I have 10/2 service, but (if I'm reading it right) my downstream symbol rate seems to indicate 5mb? I do speed test to 10 (or 25ish with "powerboost"), so I'm not sure if it is a problem. I had bought the Ambit from Charter (it's still under service contract though), but am wondering if I should dump it and go pick up something else...

Wed Oct 28 23:55:26 2009 Wed Oct 28 23:55:26 2009 Information (7) Authorized
Wed Oct 28 23:55:26 2009 Wed Oct 28 23:55:26 2009 Information (7) Registration complete!
Wed Oct 28 23:55:26 2009 Wed Oct 28 23:55:26 2009 Information (7) We registered with a DOCSIS 1.1 config file!
Wed Oct 28 23:55:26 2009 Wed Oct 28 23:55:26 2009 Information (7) Received a REG-RSP message from the CMTS...
Wed Oct 28 23:55:26 2009 Wed Oct 28 23:55:26 2009 Information (7) Sending a REG-REQ to the CMTS...
Wed Oct 28 23:55:26 2009 Wed Oct 28 23:55:26 2009 Information (7) CableModem SNMP configure complete
Wed Oct 28 23:55:21 2009 Wed Oct 28 23:55:21 2009 Information (7) IP init completed ok
Wed Oct 28 23:55:21 2009 Wed Oct 28 23:55:21 2009 Information (7) CableModem TFTP init ok
Time Not Established Time Not Established Error (4) ToD request sent- No Response received
Time Not Established Time Not Established Information (7) CableModem DHCP client init ok
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) Received a UCD message!
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
Wed Oct 28 23:54:11 2009 Wed Oct 28 23:54:11 2009 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Wed Oct 28 23:53:39 2009 Wed Oct 28 23:53:39 2009 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Oct 28 12:37:23 2009 Wed Oct 28 12:37:23 2009 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Wed Oct 28 03:02:16 2009 Wed Oct 28 03:02:16 2009 Critical (3) No Ranging Response received - T3 time-out
Wed Oct 28 03:02:12 2009 Wed Oct 28 03:02:12 2009 Critical (3) No Ranging Response received - T3 time-out
Wed Oct 28 03:02:06 2009 Wed Oct 28 03:02:06 2009 Critical (3) Received Response to Broadcast Maintenance Request, But no Un...
Wed Oct 28 03:01:34 2009 Wed Oct 28 03:01:34 2009 Critical (3) Started Unicast Maintenance Ranging - No Response received - ...
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Time Not Established Critical (3) No Ranging Response received - T3 time-out

Download levels:
Downstream Lock : Locked
Downstream Channel Id : 213
Downstream Frequency : 687000000 Hz
Downstream Modulation : QAM256
Downstream Symbol Rate : 5360.537 Ksym/sec
Downstream Interleave Depth : taps32Increment4
Downstream Receive Power Level : -2.8 dBmV
Downstream SNR : 37.1 dB

Upload levels:
Upstream Lock : Locked
Upstream Channel ID : 2
Upstream Frequency : 33000000 Hz
Upstream Modulation : QAM16
Upstream Symbol Rate : 2560 Ksym/sec
Upstream transmit Power Level : 42.2 dBmV
Upstream Mini-Slot Size : 2
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Theta @ 29th Oct 10:00AM:
Re: [HSI] Connection Keeps dropping too..

I have basically the same problem, and now that I've been reading, we're certainly not alone.

Post in the Direct forum, and they'll probably send someone out. However, in my case, I know it's not my internal wiring, so it's something in the yard, or between there and the plant.
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pbarrow @ 29th Oct 05:27PM:
Re: [HSI] Connection Keeps dropping too..

No Ranging T3 timeouts - suspect cable plant noise problems - probably Upstream SNR.

If the noise is bad enough it will cause your model to lose connection.
In fact if you get 15 T3 timeouts in a row within the T3 timer period limit the modem automatically reboots and trying to reestablish the connection (in hopes of getting a better connection - which of course it won't be cause of the noise).
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Unidus822 @ 29th Oct 06:07PM:
Re: [HSI] Connection Keeps dropping too..

Mine is doing the same thing in Haltom City, Texas. Its so bad here right now Im lucky if I can stay connected for 5 minutes. I got a new modem tried a direct link without a splitter and nothing changed.
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johnt519 @ 29th Oct 07:26PM:
Re: [HSI] Connection Keeps dropping too..

I have a post into the Charter Direct and they're asking for details - modem MAC and etc. so they can look into it. I'll post it later and hope they can do something.
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arcticvamp @ 30th Oct 01:13AM:
Re: [HSI] Connection Keeps dropping too..

I'm in the same boat in Weatherford.

I had this same problem last month.
Every 2-4 hours. Cable Modem and Telephone Modem both drop and reset.
5-30 minutes later it's back.....for 5-10 minutes.

Is plastered all over my modem logs.

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