OpenStage endpoints can be configured such that their call forwarding and DND (Do Not Disturb) keys control the Lotus Sametime Unified Telephony-based Call Forwarding - Unconditional, Call Forwarding - Busy, Call Forwarding - Don't Answer and DND state rather than their endpoint-based counterparts.
Using Server Based Features
instead of endpoint-based features is recommended for all OpenStage phones because it provides a more consistent call flow with better feature interaction checks.
Note however that the Server Based Features
option applies to all four of the features listed above. For example, it is not possible for the endpoint to control Telephony Control Server-based call forwarding, but use endpoint-based DND.
In addition to the required CF and DND features, the subscriber has to be provisioned for CSTA Access, with a CSTA type of CSTA over SIP
Configuration is also required at the OpenStage endpoint to allow uaCSTA
(User Agent CSTA) and Server Based Features
Since Lotus Sametime Unified Telephony Version 4.0R1 the recommended way to manage essential phone settings is via the Integrated DLS Device Management. From there you can easily activate uaCSTA
and Server Based Features
by selecting the corresponding options. This will automatically enable the required services for the related subscriber (CSTA, CF, DND).
If no DLS is available (for the related BG), the required configurations have to be performed manually at the Assistant and the phone.
To enable uaCSTA
at the switch, the RTP (Resilient Telco Platform) parameter Srx/Sip/UaCstaEnable has to be set to True, which is its default value.
Supported CSTA Call Control Services
The implementation makes use of the following standard CSTA (Computer Supported Telecommunications Applications) call control services:
Get ForwardingParent topic: Lotus Sametime Unified Telephony-based Call Forwarding Features
Call Forwarding - Unconditional (Station-controllable)
Call Forwarding on Busy (Station-controllable)
Call Forwarding on No Reply (Station-controllable)
Get Do Not Disturb
Set Do Not Disturb
How to Configure an OpenStage Phone for uaCSTA and Server-based Features
This procedure describes how to prepare an OpenStage phone for uaCSTA and server-based features, which is recommended for OpenStage feature access. The configuration can be performed remotely, via the DLS (Deployment Service) or OpenStage’s WBM (Web Based Management), or locally, via the phone-based administration menus.
RTP Management via Telephony Control Server Assistant
How to Provision a Subscriber for Call Forwarding on Busy
How to Provision a Subscriber for Call Forwarding on No Reply
How to Provision a Subscriber for CSTA