This read-only Integer32 (0..2147483647) reports the cell delay variation of ABR (Available Bit Rate) service on the interface, a measure of jitter in how consistently cells of that class arrive. An administrator monitors this because excessive delay variation degrades real-time payloads carried over ABR (Available Bit Rate) even when average delay and loss look acceptable. For example, an operator troubleshooting choppy voice quality on a CBR trunk checks cwspLoadCdvCbr to see whether jitter, rather than raw delay or loss, is the underlying cause.