What lower quality of service do you get?
Edit: I assume we're going to talk about G.INP/retransmission...
When retransmission was applied to ECI DSLAMS, it was found to cause short bursts of intensive noise at certain frequencies. This was fine and didn't impact performance, however a software bug in firmware for modems containing Lantiq/Intel chipsets meant the noise caused the modems to lock up. All parties were notified about this.
Lantiq/Intel developed a firmware update to resolve the issue and ECI developed a firmware upgrade that would detect a modem lockup event and proactively retrain the line.
The modems should be updated with the new firmware (although CP wires-only need to ensure their customers have updated modems). The ECI firmware update and retransmission are due to be released next month (I would guess the same time as the new DLM algorithm is introduced).
Edited by AndyHCZ (Thu 02-Feb-17 16:34:37)