15.1.1.1. OSMO Pro Combined Mode Restrictions 
- The OS4K Assistant supports TLS1.2 only starting with UCV9R4.10. Please use TLS1.2 with fallback to TLS 1.0
- OSMO Pro in combined mode requires the calling party number to be sent in E164 international format. The KNFOR entry of the node hosting the OSMO Pro clients must have set TONIN to INTERPRE. In case international format is not wanted for non OSMO Pro devices a separate node id must be used for the OSMO Pro clients.
- If the work phone (desk phone) is set as preferred device and the work phone has call forwarding activated then an incoming call will not follow the call forwarding and ring the desk phone.
- Please check also the UC planing guide and the UC release note for general OSMO Pro combined mode restrictions.
- Seamless handover performed with OSMO application is not correctly handled by UC. Therefore, handover options in UC interface are not updated after move actions made in OSMO. Call control window is missing in UC when the calling party moves the call from OSMO to work phone (desk phone).