The Call Forwarding - Unreachable feature, also known as Call Forwarding - Dependable, provides the capability to forward calls for the subscriber's line to another line when the destination is unreachable due to being either unregistered, not responding (unplugged) or audit blocked. Different forwarding targets can be specified for internal calls (from within the business group) and external calls (from outside the business group).
Because an increasing number of enterprise users are mobile users, which may result in their home DNs being unregistered for substantial periods of time, it is imperative that a Call Forwarding - Unreachable destination be provisioned for all subscribers.
The administrator activates and deactivates the feature and provides the redirect numbers for internal and external calls.
If Call Forwarding - Unreachable is activated and the subscriber receives a call while he or she is unreachable, then:
If the call is internal and a routable internal redirect number is configured, the call is forwarded to this internal redirect number.
If the call is external and a routable external redirect number is configured, the call is forwarded to this external redirect number.
In any other case, the feature is not invoked.
The Call Forwarding - Unreachable feature overrides several of the station or system forwarding events that would otherwise take place while the subscriber is in the unreachable state.
If a subscriber is unreachable, the Lotus Sametime Unified Telephony-based call forwarding types have the following precedence, if activated:
Parent topic: Lotus Sametime Unified Telephony-based Call Forwarding Features
Call Forwarding - Return
- Call Forwarding - Unconditional
- Call Forwarding - Unreachable
- Call Forwarding - No Reply
- Call Forwarding - Busy
How to Provision a Subscriber for Call Forwarding - Unreachable
This procedure describes how to configure Call Forwarding - Unreachable, a.k.a Call Forwarding - Dependable, at the feature profile or subscriber level. Feature profiles, in turn, can be created and configured at the switch level or the BG (Business Group) level. At the subscriber level, the previously assigned feature profile can be overwritten to selectively enable, disable or modify the feature configuration for the particular subscriber. Those subscriber-level modifications effectively disconnect the individual service configuration from the underlying feature profile: a subsequent Reset Subscriber Lines on the feature profile will not influence a disconnected subscriber's service configuration.
Call Forwarding Restrictions
RTP System Parameters for Call Forwarding
How to Provision a Subscriber for ONS