Hi I want to come back to thank you all for contributing. My NEC vendor was able to resolve the issue. It turns out he has 22-11-04 set to No Answer. The off premise call fowarding kept going back to the voicemail set in 22-11-06.
Once he changed 22-11-04 to "No Transfer", it is now working correctly with the timer set in 24-01.
I grew up in fremont ca in the 1950's and 1960's . The population was about 15 ,000
A LOT has changed since then. A burned-out home is listed for $800k nearby.