to switch on call waiting you must do on the ext you want to have the call waiting on ie if you want it on ext 106 then you must go offhook on ext 106 and type 7311#

also because ext 101 is an annalog phone you should switch on parrell mode so all the features work on the annalog side of the ext

1 .enter system programe mode
2 .enter 610 as system prog
3. press sp phone
4. enter the last 2 digits of the ext no:
5 . use the select to set as enable
6. press autodial store

it should work then