Matrix Telecom SARVAM UMG System Manual page 616

If Message Wait Notification is enabled on more than one SIP Trunk and you have configured same FXS
Port in 'Send MWI Notification on' field, you are recommended not to use Access Code to retrieve the
Voice Mail messages. Instead, do the following:
• Configure the Destination Number Based table. In the Destination Number Based table, enter the
Message Retrieval Number as Destination Number and select the respective SIP Trunk port as
Routing Group.
• Retrieve your messages, by dialing the Message Retrieval Number of that SIP Trunk from the FXS
Port.
• You will be connected to the Voice Mail server of the ITSP of that SIP Trunk.
Matrix SARVAM UMG System Manual 610