Obihai 110/100 Help

I have two devices 110 and 100. And I am at my wits end on how to configure them with following use case:

1. Using Phone Port dial short cuts and the actual number is dialed. For, e.g, if I dial a number *1, the actual number 16032191234 gets dialed out on the only SIP registered SIP1.
2. This is specific to 110. If an incoming call is not received in say 4 rings, then a ring tone be presented, so that a call over SIP can be made. If that call can be made using *1 shortcuts/abbreviated number, that would be awesome.

Above is the requirements for my parents and they would like to dial *1 to dial me, *2 to some other number and so on.

I have tried following documents, but honestly I am confused, so am yelping for help here.
 
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