Call park with BLF works very well. We setup 8 minute hold time before it returned to original extension. Would like ring notification after 4 minutes to remind extension it hard a call. Also how to set indefinite call holding with Call park (BLF). Please look into this feature. Avaya, panasonic and several older PBX systems have this feature. Once a customer using this feature they want it on all their future phone systems.
Using Yealink T27G phone's