This enumeration defines the interface type for a trunk.
- SL_TRUNK_INTERFACE_INVALID
- The specified interface standard is invalid.
- SL_TRUNK_INTERFACE_T1
- The trunk conforms to the ANSI T1 standard. This is the usual case in
North America and Japan.
- SL_TRUNK_INTERFACE_E1
- The trunk conforms to the CEPT or E1 standard. This is the usual case
outside North America.