15.1.1. General Restrictions and Limitations 
The following restrictions apply
- It is not supported that a user utilizes OMO Pro, Circuit-ATC, OSCC, C4B phone etc. in parallel.
- OSMO Pro is supported with STMIX/STMIY or SoftGate; classic STMI is not supported
- Video Calls are not supported by the OSMO Pro client.
- DMC is not supported for the OSMO Pro client.
- Emergency Release and Override are not supported for the OSMO Pro client.
- Answering calls from the OpenScape Mobile Pro Client is not possible
in the following cases:
- Recall on DESK phone
- OpenScape Mobile Pro Client ONS is HG member: HG was called, call ringing at DESK phone
Same restriction applies when call is in OpenScape Mobile Pro Client and OSMO Pro user chooses to answer from desk phone or alternative number using OpenScape Mobile Pro Client. - Callback and Pick-Up group (with OpenScape Mobile Pro Client):
- Callback to a client-desk configuration is executed only when this configuration is completely idle.Callback is not executed when OpenScape Mobile client calls a station which is member of the same pick-up group.
- Network Pick-Up group (OpenScape Mobile Pro Client):
- Not supported
- CHESE group (Executive / Secretary):
- Not supported
- Parallel ringing (Classic ONS group):
- Not supported
- ACD / AGENT feature:
- Not supported
- Personal Device group (Twinning):
- Not supported – OpenScape Mobile Pro Client and twinning are mutual exclusive
- COM groups
- Not supported
- SPS ( Signaling and payload separation)
- Not supported
- Speaker Call - One-Way
- Not supported
- DSS key not supported with OpenScape Mobile Pro Client. Example: OpenScape 4000 subscriber has DSS key configured in AMO ZIEL with number of the OpenScape Mobile Pro Client/Desk configuration as target. When OpenScape Mobile Pro Client has an incoming call in OpenScape Mobile Pro Client, then DSS key does not flash. The key starts flashing when the call is forwarded to the deskphone (after FWDDESK expiry).
- OpenScape Mobile Pro Client CA4000 Connectivity Adapter must not be shared with other applications which are not using full E164 Number formats.