Library /sys$common/syshlp/ncphelp.hlb SET, CIRCUIT, SERVICE mode  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Does not apply to X.25 circuits.  Specifies whether or not
 service operations (loading and loop testing) are allowed for the
 circuit.  There are two possible modes:

 DISABLED    The circuit may not be put into service state
             and may not perform service functions. This is
             the default.

 ENABLED     The circuit may be put into service state and
             perform service functions.