DTM - Denied Termination Service

This option can be assigned to any line on which the subscriber can originate
calls, but cannot receive them.  If translation attempts to terminate to a coin
line with denied termination service, translation is routed to Coin Denied
Termination (CNDT) treatment in subtable TMTCNTL.TREAT(LNT).  If the line is
other than coin, translation is routed to Denied Terminating (DNTR) treatment
in subtable TMTCNTL.TREAT(LNT).

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Line Class Codes

A Line Class Code (LCC) is an alphanumeric code that identifies the class of
service assigned to a line. An example of a LCC is
M5009. The Meridian M5009 business sets have nine keys.