Update room-concept.md

Removed public preview callouts for PSTN dialout

Author: FarrukhGhaffar

articles/communication-services/concepts/rooms/room-concept.md

@@ -69,26 +69,24 @@ At a high level, to conduct calls in a Virtual Rooms you need to create and mana
 | Get list of users invited to join a Virtual Room | ✔️ | ❌ |  ❌ |
 | A user initiates a Virtual Rooms call or joins an in-progress call | ❌ | ✔️ |  ❌ |
 | Dial-out to a PSTN user  | ❌ | ✔️ | ✔️ |
-| Add/Remove VoIP participants to an in-progress call | ❌ | ✔️ |  ✔️* |
-| Get list of participants who joined the in-progress call | ❌ | ✔️ |  ✔️* |
+| Add/Remove VoIP participants to an in-progress call | ❌ | ✔️ |  ✔️ |
+| Get list of participants who joined the in-progress call | ❌ | ✔️ |  ✔️ |
 | Start/Stop call captions and change captions language | ❌ | ✔️ |  ❌ |
 | Manage call recording | ❌ | ❌ |  ✔️ |
-| Send/Receive DTMF to/from PSTN participants | ❌ | ❌ | ✔️* |
-| Play audio prompts to participants  | ❌ | ❌ | ✔️* |
+| Send/Receive DTMF to/from PSTN participants | ❌ | ❌ | ✔️ |
+| Play audio prompts to participants  | ❌ | ❌ | ✔️ |
 
 [Calling client SDK](../voice-video-calling/calling-sdk-features.md#detailed-capabilities) provides the full list of client-side in-call operations and explains how to use them.
 
-\* Currently in [public preview](https://azure.microsoft.com/support/legal/preview-supplemental-terms/).
-
 ## Managing Virtual Rooms calls from the server-side using Call Automation Server SDK
 
 Call Automation SDK empowers developers to manage Virtual Rooms calls from the server-side and execute in-call operations. Call Automation capabilities are being progressively enabled in Virtual Rooms calls. The following table shows the current status of these capabilities. Developers manage and control Call Automation capabilities from the server-side, which operate at a higher level than a call participant's privileges. So Call Automation capabilities aren't controlled through user roles and permissions.
 
 | Call Automation capability | Supported in Rooms call | 
 | ------ | :------: |
 | Dial-out to PSTN participant | ✔️ |
-| Send/Read DTMF to/from PSTN participant * | ✔️ |
-| Send announcements to specific call participants * | ✔️ |
+| Send/Read DTMF to/from PSTN participant | ✔️ |
+| Send announcements to specific call participants | ✔️ |
 | Add/Remove a VoIP participant from an ongoing call | ✔️ |
 | End call for all users | ✔️ |
 | Call transcriptions | ❌ |