This attribute defines what type of management access port is being
configured. The Ethernet(1) interface refers to the OOB Ethernet port
on the switch controller and is used for both master and slave switch
controllers, only one of which is active at a time. Frame-Relay(4) and
PPP(5) refer to In-Band access interface. Appian-DCC(2) is used as an
extended LAN and needs to be configured for each node within an Appian
SONET Ring.