Internet and phone drop-out problem

I have both a splitter and amplifier in my hook-up.  The incoming cable goes to the splitter input and the tap on to an amplifier and the TV STB.  The splitter output goes to the Cisco DPQ3212 phone & internet modem.  The splitter info is ANtrONiX CMCDT2106T-A, -120dB RFI 5-100MHz,  The amplifier is ANtrONiX ARAI-15, FWD 52-100MHz +15dB, REV -1dB 5-42dB.

Suggestions on moving the splitter?  Should I relocate it to between the amplifier and STB?

The problem kept getting worse and more frequent and observing the intermittent nature and strand way the indicator LEDs behaved, and after talking to Tech Support, we concluded the fix options were to schedule a technician visit or for me to swap ut the Cisco phone/internet modem at the nearby Cox solution store.  For convergence and expediency I selected the latter option.  New modem, no more problems.  I recommend Cox monitor the frequency of this complaint-fix for a quality control problem with their vendor for the Cisco DPQ3212 modems.  My last post on this topic - problem diagnosed and fixed.

I thought everything was fixed and working fine - UNTIL today, 2 weeks after swaping for a new Cisco DPQ3212 internet/phone modem.  We were out f town for over a week since replacement, so I don't know if there were any drop-outs while we were gone, but it was working when we returned and until today.

Internet and phone service went out, and I restored it by rebooting the modem with the reset button on the back of the modem.  I checked the status of the modem using http://192.168.100.1/Docsis_system.htm before and after the reset.  They looked identical, stating "operational" status in each case and showing identical upstream power levels.  With the old modem it would state "operational" status whether working or not, but the upstream channel power levels would be 0.0 dBmv on channels 1 through 3, 50.5 dBmv on channel 4 when not operational.  When operational channels 1 through 3 are at 51.0 dBmv.

I notice in some f the other threads about this frequent problem there is a mention of a modem event log.  How do I access the event log?  I'm going to be out of town the rest of this week and would like to see it the problem occurs while I am gone.  It is going to be hard to resolve such an intermittent problem with a technical visit since the probably of him/her visiting while there a problem is present is quite small.

Other suggestions?

drbob said:
With the old modem it would state "operational" status whether working or not, but the upstream channel power levels would be 0.0 dBmv on channels 1 through 3, 50.5 dBmv on channel 4 when not operational.  When operational channels 1 through 3 are at 51.0 dBmv.

Sounds like your upstream signal is too high. Should be below 50. Might need a technician out to find out why. 

The CMCDT2106T looks like a splitter with a 6dB downstream drop on the "tap" and a 4dB upstream increase on both. I couldn't find stats on the amp, but since the modem isn't hooked up to it, I don't think it should matter. But that means the upstream signal going into the splitter is either 46dB+ or something is wrong with the splitter. Maybe try replacing it with another of the same type and see if your signal levels change? If not, then can you describe how the cable gets from the outside to the input of the splitter? IE wires in basement? Attic? etc