Appendix C
V.35 Technical Information
ViewStation User Guide
198
www.polycom.com
Nondialed Network-Initiated Call State Machine
Note 1:
DSR is used as a ring-in indicator if DSR is set to ANSWER
in the V
.35 Advanced Configuration
screen.
Note 2:
RTS does not act as shown but acts as a resync-pulse if
Security/Crypto-Resync
is set to ON.
Note 3:
DTR does not act as shown but remains at a high voltage if
DTR is set to ON in the
V.35 Advanced Configuration
screen.
Note 4:
If DCD filter is set to ON in the
V.35 Advanced
Configuration
screen, the system does not react to a low DCD until
DCD has been low for 60 seconds.
State
ViewStation Signals
Network Equipment Signals
1
Initial State:
DTR = 0 <note 3>
RTS = 0 <note 2>
CRQ = 0
Initial State:
RI = 0
DLO = 0
ACR = 0
DSR = 0
USER INITIATES CALL
2
DCD = 0 to 1
3
DTR = 1<n
4
RTS = 1<note 2>
5
DATA FLOW STARTS
DATA FLOW STARTS
User Hang-up
Far End Hang-up
6
RTS = 0 <note 2>
DTR = 0 <note 3>
CRQ = 0
All signals go low if Far End or User hang-up is
detected.
DSR= 1 to 0, OR DCD= 1 to 0
A falling edge on DSR or DCD is interpreted by
the ViewStation as a hang-up.
<note 4>
7
IDLE
DTR = 0 <note 3>
RTS = 0 <note 2>
CRQ = 0
IDLE
RI = 0
DLO = 0
ACR = 0
DSR = 0
Summary of Contents for VIEWSTATION
Page 1: ...ViewStation User Guide ViewStation User Guide November 2001 Edition 3725 10755 001 ...
Page 2: ......
Page 12: ...ViewStation User Guide xii www polycom com ...
Page 16: ...Preface How To Use This Guide ViewStation User Guide xvi www polycom com ...
Page 148: ...Chapter 3 Using the ViewStation ViewStation User Guide 132 www polycom com ...
Page 186: ...Chapter 4 Using the ViewStation with a PC ViewStation User Guide 170 www polycom com ...
Page 192: ...Chapter 5 System Information and Diagnostics ViewStation User Guide 176 www polycom com ...
Page 218: ...Appendix C V 35 Technical Information ViewStation User Guide 202 www polycom com ...
Page 226: ...Appendix D ISDN Information ViewStation User Guide 210 www polycom com ...
Page 230: ...Chapter E Optional Equipment Configuration ViewStation User Guide 214 www polycom com ...