The format used by the client for the Calling-Station-ID attribute
(attribute number 31):
delimited In the Calling-Station-ID attribute (attribute 31) use
the format '<delimiter><BAS name><delimiter>
<interface description><delimiter><layer 2 identifier>'.
fixedFomat In the Calling-Station-ID attribute (attribute 31) use
the format of 4 bytes for the host name (truncated if
needed), 2 digits of slot, 1 digit of port, 3 digits of
VPI, followed by 5 digits of VCI.