Scientific Atlanta 2100 With VM
 

I got VM 20mb installed and also got a free Scientific Atlanta 2100 Cable modem. (is this modem any good!?)

My question is this (if you would be so kind) is there a direct route into admin panel (like with ADSL routers) you know an ip entry 192.168.1.1 ?

I don't seem to see one.

Also it comes up sometimes that Local Area Connection is disconnected and then connects again about a min later, I have checked all wires and everything is working ok with the pc, is this just the modem or is this common?

Thank you.
CIS

Re: Scientific Atlanta 2100 With VM
 

Hi CIS,

First off, welcome aboard !

You can reach the 2100 admin panel by navigating to http://192.168.100.1

As for the disconnections, I've not had that problem, it could be that your modem is dropping sync, once you've got to the admin pages check the logs.

HTH

Bri

Re: Scientific Atlanta 2100 With VM
 

Thank you for the reply Synner

The logs look like this, I take it this is not a good thing.

Thu Aug 30 14:31:38 2007 Critical (3) DHCP WARNING - Non-critical field invalid in response.
Thu Aug 30 14:31:31 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:31:21 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:31:02 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:30:28 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:30:11 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:28:59 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:28:42 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:28:28 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:28:09 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:27:41 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:27:17 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:26:50 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:26:27 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:26:05 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:25:45 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:25:16 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:24:53 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:24:40 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:24:14 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:23:01 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:22:44 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:22:24 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:21:59 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:21:25 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:21:06 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:29:58 2007 Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC f...
Thu Aug 30 14:20:52 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:20:25 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:20:13 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC
Thu Aug 30 14:19:49 2007 Critical (3) No Ranging Response received - T3 time-out
Thu Aug 30 14:19:40 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC

Re: Scientific Atlanta 2100 With VM
 

Hi,

Some of the items in your logs look normal, heres mine:

Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Tue Aug 28 17:02:52 2007 Critical (3) Resetting the cable modem due to docsDevResetNow
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire FEC f...
Time Not Established Critical (3) DHCP FAILED - Discover sent, no offer received
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) DHCP WARNING - Non-critical field invalid in response.
Time Not Established Critical (3) No Ranging Response received - T3 time-out
Time Not Established Critical (3) Resetting the cable modem due to console command
Time Not Established Critical (3) SYNC Timing Synchronization failure - Failed to acquire QAM/Q...
Time Not Established Critical (3) Resetting the cable modem due to console command

Not sure about this though: Thu Aug 30 14:24:40 2007 Critical (3) Unicast Ranging Received Abort Response - Re- initializing MAC

Post your signal details, may give us more clues..

Bri

Re: Scientific Atlanta 2100 With VM
 

my logs look alot like that too

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

Re: Scientific Atlanta 2100 With VM
 

Downstream Status Operational
Channel ID 7
Downstream Frequency 339000000 Hz
Modulation 256QAM
Bit Rate 20480000 bits/sec
Power Level -5.6 dBmV
Signal to Noise Ratio 40.7 dB


Upstream Status Operational
Channel ID 3
Upstream Frequency 37500000 Hz
Modulation 16QAM
Bit Rate 768000 bits/sec
Power Level 61.0 dBmV

The speeds thus far have been great.

Re: Scientific Atlanta 2100 With VM
 

Hi,

Lucky you ! My speeds are all over the place, not had anything over 15Mb/s yet... ah well...!

I'm a little concerned about your upstream power level, looks a little high to me, mines at 41dBmv.

Hopefully someone else will confirm/deny..

Bri

Re: Scientific Atlanta 2100 With VM
 

Its probably dropping its connection as the upstream power levels is V. high.

Re: Scientific Atlanta 2100 With VM
 

How do I go about lowering the upstream power level (mind you, the connection has not dropped in a few hours) and the level is now at - 59.5 dBmV

Re: Scientific Atlanta 2100 With VM
 

you will need a tech out to alter power from the cab

Re: Scientific Atlanta 2100 With VM
 

It has not disconnected in a while now (hours) and I have been on it all day. So I think I will just leave it and maybe get tech out if I have any big problems, because the speeds are flying, my downloads today have not dropped below 2500.0 Kbytes/s (2.5MB/Sec) and I am pulling a 600mb file down in 5 mins.

Thanks for all the support. very nice of you all.

Re: Scientific Atlanta 2100 With VM
 

You still realy need to get that upstream power level attenuated. Should be below 58 and above 30 to function normally.

Re: Scientific Atlanta 2100 With VM
 

No choice now, as the internet connection died a death this morning, I put the pc on, did a speed test (20meg flying) went to load up a webpage and nothing, from that the cable light was flashing and then just went out. No upstream at all and the down rate was on -17, also no mac address, bla bla

So I called tech support and they are sending an engineer out tomorrow to take a look see, but from what I can make out, a lot of people are having a lot of problems.

Re: Scientific Atlanta 2100 With VM
 

If possible try to ensure the engineer doesnt just swap the modem or add an attenuator to the back of the modem. He will need to make his adjustments from the cabinet to make them perminent.

Re: Scientific Atlanta 2100 With VM
 

Thanks for the good advice.

Just so I can get it right, what is the cabinet. is it the small white box on the inside of the room, where the cable enters the house?

So I can take a look on the day and see if he goes near it.