- KX-A249 bracket- 2 Ports expandable to 6- 4 Hours expandable to 8- 64 Mailboxes- The KX-TVA50 has an option to add expansion cards. These cards are to expand the voice mail to a 4 or 6 port voice mail. This option is NOT available when the KX-TVA50 is being used with the KX-TA624 or KX-TA824 phone systems it can only be used as a 2 port voice mail!!!!!!!!!!!!!KXTVA50
