From the Opt 11C manual:
TRAC c acod List route number, type and status of each trunk for customer c
TRAC c dn Trace calls for customer c Directory Number or Local Steering Code dn
TRAC c r m Trace calls, customer c, route r, member m
TRAK c u Trace calls associated with this unit
TRAK c u k Trace calls associated with key k on specified unit
TRAC x yyyy Trace using customer number as DN
TRAC xx...xx DEV Print auxiliary data
TRAC zzzz Trace using TN of the set to be traced
TRAD loop ch Trace DTI or DLI calls, channel ch of loop
TRAT c a Trace calls, attendant a of customer c
TRAT c a k Trace calls associated with key k of attendant console a for customer c
TRAO c u Trace attendant calls, this unit
TRAO c u k Trace attendant calls on key k
TRAO xx...xx DEV Print auxiliary data
From the M1 manual for Opt 51C or higher (most of these can also be used on Opt 21 or higher):
TRAC c acod List route number, type and status of each trunk for customer c
TRAC c dn Trace calls for customer c Directory Number or Local Steering Code dn
TRAC c r m Trace calls, customer c, route r, member m
TRAC l s c DSLx Trace calls on Digital Subscriber Loop x (0-7)
TRAC l s c u Trace calls associated with this unit
TRAC l s c u k Trace calls associated with key k on specified unit
TRAC x yyyy Trace using customer number as DN
TRAC xx...xx DEV Print auxiliary data
TRAC zzzz Trace using TN of the set to be traced
TRAD loop ch Trace DTI or DLI calls, channel ch of loop
TRAT c a Trace calls, attendant a of customer c
TRAT c a k Trace calls associated with key k of attendant console a for customer c
TRAT l s c u Trace attendant calls, this unit
TRAT l s c u k Trace attendant calls on key k
TRAT xx...xx DEV Print auxiliary data
Also available on Opt 11C or higher running software rls 19 or greater - the Enhance Trace feature:
(**Please note that Multi-user Login must be ON**)
DALL Disable all enhanced trace commands.
DIST n Disable the enhanced trace operation.
ENTC l s c u t Enable the enhanced trace command for a TN.
ENTD l ch t Enable the enhanced trace command for a digital trunk.
FITR Get information about the enhanced trace function.
GOTR Begin enhanced trace commands. This command starts the trace
operation specified with the ENTC and ENTD commands.
STPT Stop the enhanced trace command.
DD