Call control procedures 5-27
Digital Switching Systems DMS-250 ISDN Reference Manual MWC14 (CSP14)
Figure 5-16
User-initiated call disconnect
Originating
switch
EVS switch
EVS
ARU
REL
DISC
FACILITY
FACILITY
REL
REL COM
RLC
(PRI)(ISUP)
(FAC IE, INV 1, NARS BLG,
menu billing info)
(FAC IE, RR 1, NARS BLG)
Figure 5-17 illustrates an EVS-initiated call disconnect message sequence.
Figure 5-17
EVS-initiated call disconnect
Originating
switch
EVS switch
EVS
ARU
REL
FACILITY
FACILITY
REL
REL COM
RLC
DISC
(PRI)(ISUP)
(FAC IE, INV 1, NARS BLG,
menu billing info)
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