The OFDM channel subcarriers are greatly reduced in signal levels compared to the QAM channels. So, if there is a problem with broadband noise in the buildings cable system across the OFDM band, or significant noise in certain OFDM frequencies, you would probably end up with greater data losses and a need to retransmit data that was lost. That would lead to greater jitter numbers as the ping times would or could be longer depending on what protocol was used, we're talking about ping to ping times which is used in the jitter calculation.
OFDM is very robust in comparison to the QAM channels due to additional error correction, but, I don't think its indestructible. Taking OFDM out of the lab and into the real world probably has its challenges, the greatest probably being system noise.
Should CODA Release 220.127.116.11 (January 5, 2020) be dated 2021?
I am currently 18.104.22.168. Should it automatically update?
I noticed this morning that upstream is no longer connecting to OFDM/OFDMA and it is showing as disabled again in the OFDM/OFDMA Overview on both channel index. Front modem indicator lights also are light blue on download and dark blue on upload.
I was surprised to see that the upload link light on my CODA-4582 modem is now light blue instead of dark blue, and I logged into the modem to see that indeed OFDM/OFDMA is enabled again.
I was enjoying very stable internet in the last few weeks when it was disabled, and no issues with Teams video calls.
@eyeeifmx if you find that the modem is not stable, as in you have uplink problems, call tech support and have the tech disable the OFDMA channel (upstream).
Its possible that Rogers techs have been busy in your area working to resolve issues that caused the earlier uplink issues, but, since there has not been any info released by any Rogers staff member, no one outside of Rogers knows what the issues are.
So, without any further info available, the simple response to ongoing problems is to simply disable the OFDMA channel.