Hello. TM 3402A Modem here:
My ISP was Purchased by Zito Media... After the 'switchover' to GSNAT that included a 2-3 day 'down time', system has been crazy.... Zito Saw T3/T4 timeouts, MTA Resets, and 5/22/2022 I found ISP cable end that had never been crimped (Install date on RG11 ISP Cable: 8/2015)... Zito Tech confirmed this and re-ended and tested entire system, from Modem to pole and deemed it good.... MTA Resets have ceased since cable connector replacement. He said my modem was 3db 'Hot' compared to Zito specs, and a 3db pad was added to TM 3402A modem... 5/26/2022. ISP RG11 connected to Quad Shielded RG6 in garage, then 3” dry pipe to house, direct to modem. No splitters. After connector repair and test, Was good for 2.5 days, then I started having Event log items again...
When entries start filling up Event Log, speeds, especially upload speeds decay and stagnate... Both ISP's configured TM3402A for 16 Dn, 4 Up channels.... no phone connection..
Wanting to know it was a problem upstream of me, or not, I used a device to ping both my Modem IP and ISP Server IP feeding modem.... Over time, Modem is always 100% successful, but Server ping response degrades over time, and eventually stop communicating altogether... (I have date and time stamped log of when modem is power cyled).. It can be brought back to life with a modem power cycle.... Then the slow speeds that were a tipoff to Event Log entries, and the pings to the sever feeding me, are reset to normal. Purchased speeds are then achieved, All is good.
Modem Keep alive was expanded from a 4 minute, 5 consecutive pings loss/Power cycle modem I used for prior ISP successfully for years, with maybe 2-3 power cycles in 2 years, to 5 minute, 6 consecutive ping loss/Power cycle, and nearly daily occurrences.... with strange 2 day gaps where system worked as it should, and nothing at all is logged!!! It's as if system is being randomly broken, then fixed, then broken again...
Modem was New 12/2021.... All IT gear on UPS with AVR, and whole house on Generator... and whole house Surge Suppressor... I have an Arris Status printout of New Modem 10 min after New Modem installation in December of 2021, and it compares to Present Status Printout except for 3 db power difference which I assume is the recently installed 3 db Pad....
Arris Event Logs contain the same 3-4 different messages over and over again...
I have captured these and started daily saving to PDF, with Post it notes added indicating when power cycles occurred.....
Would someone be willing to look at them and give their best bet as to what is going on?
Please note that prior to the May 2, switchover to Zito... Same modem, system here was flawless.... even with badly crimped ISP Cable..... Now I'm chasing ghosts....
Thanks for any reply
↧