This attribute is only used if the Wan protocol is Wellfleet Standard
Proprietary Point to Point. This attribute is unused for other Wan
protocols.
The remote HDLC address can take on values between 1 and 7. The default is
7. 1 is refered to as DCE. 3 is refered to DTE. All others are refered
to as EXPLICIT. EXPLICIT indicates that the user has explicitely selected
the address.