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

 Applies only to X.25 DLM Switched Virtual Circuits (SVCs). For
 outgoing circuits, specifies the remote DTE address and
 subaddress  that this DLM circuit will call. For incoming
 circuits, specifies the  address of the remote DTE from which
 this circuit will accept calls. If the NUMBER parameter is not
 specified for an incoming circuit, a  call from any remote DTE
 can be directed to this circuit. Specify a  decimal integer of 1
 to 15 digits.