3.4.3 Manual call setup sequence
CES | NCS | FELCOM |
Call to
subscriber
Reply from subscriber
SES RQ
CESI
Ch. assignment req. SU
Channal assignment SU
NCSI
HSUB
Scr. vec. ack SU
HSUB
Fill in SU
CES connect
HSUB
Access req. SU
NCSA
Service addr. SU scr. vec. advise SU HSUB
HSUB
HSUB
SES connect SU
Calling operation
(dialing)
RI ON
Ret. carrier ID SU
OFF HOOK
(DTR ON)
RI OFF
DSR ON
CTS/DCD ON
Figure 7 Manual call setup sequence
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