Polycom ViewStation Manuel d'utilisateur télécharger pdf (Page 210)

Appendix C V.35 Technical Information

ViewStation User Guide 194 www.polycom.com

State Machine

The V.35 State Machine describes how the V.35 interface signals

handshake with the network interface equipment during call

establishment.

Dial Out State Machine

State ViewStation Signals Network Equipment Signals

1 Initial State:

DTR = 0 <note 3>

RTS = 0 <note 2>

CRQ = 0

USER INITIATES CALL

Initial State:

RI = 0

DLO = 0

ACR = 0

DSR = 0

2 DTR = 1<note 3>

3 Wait 10 ms

4 CRQ = 1

5 PND = 1

6 Set Digit (NB1,NB2,NB3,NB4)

7 DPR = 1

8 PND = 0

9 DPR = 0

10 If not the last digit, go to state 4 otherwise

continue

11 Call connects on network

12 DSR = 1 AND/OR DCD = 1

(AND/OR DSR = 1 <note 1>)

13 RTS = 1<note 2>

14 DATA FLOW STARTS DATA FLOW STARTS

User Hang-up Far End Hang-up

1 2 ... 205 206 207 208 209 210 211 212 213 214 215 ... 249 250

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Polycom ViewStation Manuel d'utilisateur Page 210