Having the feature to choose quantity of line on hold per extension like in Call manager (from 1-50 like for parked call and for queue)
For us, parking call and Queue are not an option, we absolutely need to place waiting calls on hold on one extension but we are limited to 4-6 calls at a time, we absolutely need to have at least 25.
Example of feature on Call Manager
Multiple Call/Call Waiting Settings on Device
Note:The range to select the Max Number of calls is: 1-200
Maximum Number of Calls￼
(Less than or equal to Max. Calls)