1.5 Administrator's Guide

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  5. Call behavior on No answer / Busy
  6. Ring Back

Ring Back

In the event that a call is transferred to a destination extension that is busy, or unanswered, the ringback mechanism will send the call back to the transferring party, with a modification to the CID. The new CID presented to the transferring party will be prefixed by “Ret:” to indicate that the call is returning, as well as a the extension number of the destination extension to which the original call was transferred. The Ringback caller id will have the form :

“Ret: [original intended destination extension]CID”

Note that Ringback functionality is only activated on destination extensions with follow me or voicemail enabled. Transferred calls to extensions with neither configured will ring indefinitely if unanswered, or fail with an engaged tone should the extension be unavailable.

Note that the follow me of the destination extension will be evoked before the ringback occurs, so a transfer to an extension with follow me enabled, will only ring back to the intermediary extension if the destination extension and all extensions in its follow me list, are unavailable or unanswered.

If the ringback mechanism sends the call back to the transferring extension and this extension is no longer available, or the call is unanswered, the destination will be as in the table below:

Intermediary Voicemail Enabled

Intermediary Follow me Enabled

Destination Voicemail Enabled

Destination Follow me Enabled

Ringback Occurs

Ringback Failover Destination

N/A

Destination extension Follow me failover

Destination extension voicemail

Destination extension Follow me failover.

N/A

Destination extension Follow me failover.

Destination extension voicemail

Destination extension Follow me failover.

N/A

Destination extension Follow me failover.

Destination extension voicemail

Destination extension Follow me failover.

N/A

Destination extension Follow me failover.

Destination extension voicemail

Destination extension Follow me failover.

Intermediary Voicemail Enabled

Intermediary Follow me Enabled

Destination Voicemail Enabled

Destination Follow me Enabled

Ringback Occurs

Destination After Ringback

Destination extension voicemail

Destination extension Follow me failover.

N/A

Destination extension Follow me failover.

Destination extension voicemail

Destination extension Follow me failover.

Table 25: Ring-back behavior

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