As at July 2016; Source: colima communications

Feature colima Cerebro 'Call handling Options' Skype for Business Native
'Busy Options'
Works with Lync Server 2010/2013  check-tick-icon-14147-24px.png remove-icon-png-7115-24px.png 
Works with SBA/SBS
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SBA with Lync 2010/2013 not supported
Server-based solution check-tick-icon-14147-24px.png

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Device independent configuration (phone device, SfB Client) check-tick-icon-14147-24px.png
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Independent from presence status 'In a call' check-tick-icon-14147-24px.png   check-tick-icon-14147-24px.png
New incoming calls are rejected (busy signal) when the user is busy check-tick-icon-14147-24px.png   check-tick-icon-14147-24px.png
New incoming calls are forwarded to voice mail when the user is busy  check-tick-icon-14147-24px.png check-tick-icon-14147-24px.png 
New incoming calls are forwarded to a phone number when the user is busy  check-tick-icon-14147-24px.png remove-icon-png-7115-24px.png 
New incoming calls are forwarded to the users Team-Call Group members
when the user is busy (only to free members)
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Exclude certain callers from Busy / Forwarding (Whitelist) check-tick-icon-14147-24px.png  remove-icon-png-7115-24px.png 
Team calls  check-tick-icon-14147-24px.png
Busy or Forward call. Only if all the Team-Group members are busy or offline (all members are checked)

2nd call is ringing at the busy user

Busy on delegate calls check-tick-icon-14147-24px.png
Busy or Forward call. Only if all the delegates are busy or offline (all delegates are checked)
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2nd call is ringing at the busy user
Resonse Group calls  check-tick-icon-14147-24px.png  ?
Configuration per User check-tick-icon-14147-24px.png
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Configuration by User check-tick-icon-14147-24px.png
(via SfB Client, Whitelist)
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Busy during ringing / establishing call check-tick-icon-14147-24px.png check-tick-icon-14147-24px.png
Busy on forward to a user who is in a call check-tick-icon-14147-24px.png remove-icon-png-7115-24px.png
2nd call is ringing at the busy user
Notification check-tick-icon-14147-24px.png
(E-mail)
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Notification content
  • Declined call was forwarded by user X
  • List of users who have also received this notification
  • Only the right user will be notified at Team- or Delegation calls
?
Busy if Mobile user is in a call check-tick-icon-14147-24px.png ?
Calls from federated users check-tick-icon-14147-24px.png ?
Different handling for calls from intern/extern check-tick-icon-14147-24px.png remove-icon-png-7115-24px.png
Only if all team members or delegates are busy or offline check-tick-icon-14147-24px.png remove-icon-png-7115-24px.png
     
Forward call based on Presence status  

Busy (different to 'In-a-call')
In-a-conference
DoNotDisturb [1]
In-a-presentation
BeRightBack
OffWork
Idle
Away
Offline

Possible forwarding targets:
Phone number, mailbox or all
free members of the users Team-Call Group
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[1] works, when user is in status ‘DND’ and on the phone