State Machine; Dial Out State Machine - Polycom ViewStation SP ViewStation User Manual

Appendix C

State Machine

Dial Out State Machine

State
1 Initial State:
DTR = 0 <note 3>
RTS = 0 <note 2>
CRQ = 0
USER INITIATES CALL
2 DTR = 1<note 3>
3 Wait 10 ms
4 CRQ = 1
5
6 Set Digit (NB1,NB2,NB3,NB4)
7 DPR = 1
8
9 DPR = 0
10 If not the last digit, go to state 4 otherwise
continue
11
12
13 RTS = 1<note 2>
14 DATA FLOW STARTS
User Hang-up
ViewStation User Guide
The V.35 State Machine describes how the V.35 interface signals
handshake with the network interface equipment during call
establishment.
ViewStation Signals Network Equipment Signals
Initial State:
RI = 0
DLO = 0
ACR = 0
DSR = 0
PND = 1
PND = 0
Call connects on network
DSR = 1 AND/OR DCD = 1
(AND/OR DSR = 1 <note 1>)
DATA FLOW STARTS
Far End Hang-up
194
V.35 Technical Information
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