Mike's PBX Cookbook

CLS Access Restrictions

Station class of service (CLS) trunk access restrictions, set in LD 10 (analog sets) and LD 11 (digital sets).

CLS ➤UNRCTD/CUNTLDSREFREFR1FR2
Incoming
CO/FX Calls		✅✅✅✅Via Call
Modification #2		❌❌
Outgoing
Non-Toll
CO/FX Calls		✅✅✅Via Attendant
or UNR Set #1		Via UNR
Set #1		❌❌
Outgoing
Toll (0/1+)
CO/FX Calls		✅Via
BARS/NARS		Via Attendant
or UNR Set #1		❌❌
To/From
TIE Trunks		✅✅✅✅✅✅❌
To/From
Internal		✅✅✅✅✅✅✅
BARS/NARS
TGAR=NO #3		Uses NCOS
only		Uses NCOS
only		Uses NCOS
& CLS		Uses NCOS
& CLS		Uses NCOS
& CLS		Uses NCOS
& CLS		Uses NCOS
& CLS
BARS/NARS
TGAR=YES #3		Uses NCOS
& TGAR		Uses NCOS
& TGAR		Uses NCOS,
CLS, & TGAR		Uses NCOS
CLS & TGAR		Uses NCOS
CLS & TGAR		Uses NCOS,
CLS & TGAR		Uses CLS
only

Access Restrictions:

  • UNR - Unrestricted
  • CTD - Conditionally Toll Denied *
  • CUN - Conditionally Unrestricted
  • TLD - Toll Denied
  • SRE - Semi-Restricted
  • FRE - Fully Restricted
  • FR1 - Fully Restricted 1
  • FR2 - Fully Restricted 2

Key
Direct Access
Indirect Access
No access

Notes:

  • #1 Call Modification: TRN, CONF, etc.
  • #2 Call Mod: TAFAS, Call Pickup, TRN
  • #3 LD 86: ESN, check TGAR (NO) YES
  •   * CTD is default / TGAR=NO is default
Toll calls are those made on North American Toll Plan routes (NATL=YES) where 0 or 1 is dialed as a first or second digit after the direct access code (ACOD). Special numbers, eg. 411, 611, and 911, are allowed by default unless specifically restricted by NFCR.