No Long distance calling 1

NCOS can be used in Barring in a couple of ways

LD 87
REQ prt
CUST 0
FEAT nctl
NRNG <ncos you want to see or "0 99" for all>

example Print out
NCOS 2

EQA NO
FRL 2
RWTA NO
NSC NO
OHQ NO
CBQ NO
SPRI 0
MPRI 0
PROM 0

The FRL can be used in a couple of ways you can bar calls from using a route list index (LD 86) that routes your calls as the FRL must be Greater than or Equal to the FRL defined on the RLI

example

RLI 180
ELC NO
ENTR 0
LTER NO
ROUT 15
TOD 0 ON 1 ON 2 ON 3 ON
4 ON 5 ON 6 ON 7 ON
VNS NO
CNV NO
EXP NO
FRL 0
DMI 180
CTBL 0
FCI 0
FSNI 0
SBOC NRR
IDBB DBD
IOHQ NO
OHQ NO
CBQ NO

The other place is the FRL is tied to an FCR (prt/chg LD 49)by the RDB (chg LD 16, prt LD 21)

TYPE RDB
CUST 00
ROUT 10

towards the bottom you see
FRL 0 0
FRL 1 1
FRL 2 2
FRL 3 3
FRL 4 4
FRL 5 5
FRL 6 6
FRL 7 7

then in LD 49 you can see the FCR ALLOW/DENY for numbers

example US only allow 911

CRNO 1
INIT DENY
ALOW 911

or say allow everything except international

CRNO 1
INIT ALOW
DENY 011