You can record a message and send it to the voicemail of one or more numbers without causing any of the recipients’ phones to ring.
If you have Voicemail Plus, you can send your message to one of your three distribution lists, each of which can have up to 10 numbers. Otherwise, you must dial each recipient’s number manually.
To use this feature:
Access your Voicemail.
Press 2 and follow the instructions.