I agree with the last comment by using Scheduled Access Restriction which is done via LD 88. Here is a very very old guide I once did below. You will still need to refer it to the current documentation and access each TN in LD 20 to put the DN into a new group.
SARG.TXT
CONFIGURATION OF SCHEDULED ACCESS RESTRICTION GROUPS.
>LD 88 ON A OPTION 11 18.40H
REQ NEW
TYPE SAR ------------------- SCHEDULED ACCESS RESTRICTION
CUST 0 ------------------- CUSTOMER
SPWD ------------------- ENTER SECURE DATA PASSWORD
SGRP 1 ----------------- SCHEDULED ACCESS RESTRICTION GROUP No.
SCDR YES ------------ ACTIVATE CALL DETAIL RECORDING FOR SAR CODE
OFFP 1 ------------------- OFF HOUR PERIOD No.
STAR 00 00 17 30 ---------- START TIME
STOP 00 00 23 59 ---------- STOP TIME
DAYS 2 3 4 5 6 --DAYS ON WHICH ACTIVE (1 = SUNDAY 7 = SATURDAY)
COS FRE ---------- CLASS OF SERVICE TO BE APPLIED
TGAR 1 ---------- TGAR TO BE APPLIED
NCOS 1 -------- NETWORK CLASS OF SERVICE TO BE APPLIED
OFFP 2 }
STAR 00 00 00 00 }
STOP 00 00 07 59 }
DAYS 2 3 4 5 6 } OFF PERIOD 2
COS FRE }
TGAR 1 }
NCOS 1 }
OFFP 3 }
STAR 00 00 00 00 }
STOP 00 00 23 59 }
DAYS 1 7 } OFF PERIOD 3
COS FRE }
TGAR 1 }
NCOS 1 }
OFFP
ICR YES ------------ INCOMING CALLS RESTRICTED DURING OFF PERIODS
LOCK 3 ------------- OFF PERIOD TO BE USED IF SAR LOCK ACTIVATED
REQ PRT ##### PRINTOUT OF THE ABOVE INFORMATION #####
TYPE SAR CUST 0 SPWD TEN SGRP 1
SGRP 001
SCDR YES
OFFP 1
STAR 17 30
STOP 23 59
DAYS 2 3 4 5 6
COS FRE
TGAR 01
NCOS 01
OFFP 2
STAR 00 00
STOP 07 59
DAYS 2 3 4 5 6
COS FRE
TGAR 01
NCOS 01
OFFP 3
STAR 00 00
STOP 23 59
DAYS 1 7
COS FRE TGAR 01 NCOS 01 ICR YES LOCK 3 REQ ****
Firebird Scrambler
Nortel Meridian 1 / Succession and BCM / Norstar Programmer in the UK
Advance knowledge on BCM support