CLS Access Restrictions

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

CLS ➤	UNR	CTD/CUN	TLD	SRE	FRE	FR1	FR2
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	Via Attendant or UNR Set #1	Via 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.