A successful eSRVCC voice handover from 4G to 3G with good audio quality on the E\\\ lineup was achieved in the Redmond Lab. This major breakthrough is a first ever using a real device (Seahawk was used) in a real network (no simulations). The final hurdle was removed implementing the workaround on the ACME SBC suppressing the BYE message (this workaround is the POR for launch). Kudos to the architecture teams, platform teams and integration teams on the Mobility and IMS side for this major accomplishment which involved months of hard work of testing and troubling shooting. Obviously there is much testing to be completed to validate the complete functionality but we are finally out of the starting gate!
Tier 1 Telco in North America