This is the configured receive speed for this VDSL modem, the mirror of cvdslLineConfTxSpeed, and it must match the peer's transmit-speed configuration for the line to operate at its intended full rate. It matters most during provisioning consistency checks, ensuring both ends of a line were configured with matching complementary speed values rather than one side being updated for a speed upgrade while the other was left at the old value. A support ticket about a line 'suddenly' running slower after a speed-upgrade order often traces back to only one end's speed object having actually been updated.