Sunny day: Incoming call to ATA phone transferred to centralized voice mail

Last Updated : Nov 01, 2015 |
The following image shows the call media flow for a call to an ATA phone in the same branch. In this scenario, the call is transferred to a centralized Avaya Aura® Messaging or Avaya Modular Messaging voice mail system in Sunny day.
Figure: Sunny day — incoming call to ATA phone transferred to centralized voice mail
The following table describes the call signaling flow in more detail.
Call signaling flow description for incoming call to ATA phone transferred to centralized voice mail in Sunny day
Call scenario
Description of call signalling flow
  1. SIP Centralized user A calls SIP Centralized ATA user B.
  2. User B does not answer the call.
  3. Call is forwarded to an Avaya Aura® Messaging or Avaya Modular Messaging centralized voice mail system.
  4. User A leaves a voice mail message for user B.
  5. User A hangs up after leaving the message.
  6. Message Waiting Indicator lights up on user B’s phone to indicate that a new voice message is waiting.
  1. User A SIP Invite Session Manager Communication Manager Session Manager IP Office user B.
  2. Ringing ATA phone IP Office Session Manager Communication Manager Session Manager user A.
  3. CANCEL is sent for the original invite and a new invite is sent from Communication Manager Session Manager centralized Avaya Aura® Messaging or Avaya Modular Messaging voice mail system.
  4. Media is set up between user A and the voice mail system.
  5. BYE is sent from user A Session Manager Communication Manager Session Manager voice mail.
  6. NOTIFY is sent from voice mail Session Manager Communication Manager PUBLISH to Session Manager NOTIFY IP Office user B with Message Waiting Indication.