Appendix C
V.35 Technical Information
©
Polycom, Inc.
199
ViewStation User Guide
Crypto Resync
If a cryptographic encoder/decoder is connected between the
ViewStation and the network, it may require a resynchronization
signal from the ViewStation. This is a signal indicating that the
ViewStation has lost video synchronization due to a network
problem and requires that the cryptographic encoder/decoder
resync with the equipment at the other end of the connection.
To enable this feature select
System Info > Admin Setup >
Security
. When you select the
Crypto Resync
option, the
Crypto
Resync Pulse
screen appears.
On this screen, you can enable crypto resync, set the time between
pulses (in seconds), and set the pulse width (in milliseconds).
If the ViewStation is in a call and it loses H.320 synchronization, it
continuously sends the resynchronization pulses at the specified
rate with the specified pulse width until H.320 regains
synchronization.
The resync pulse is output on the Ready-To-Send or RTS signal. If
this feature is enabled, the RTS signal no longer functions as the
RTS signal. Most installations that use encryption equipment require
a custom cable. The cable should be designed to route the RTS
signal from the ViewStation to the appropriate resync input on the
encryption equipment. The encryption equipment can get its RTS
input from the ViewStations DTR output or by wiring this input to an
always-high tie-off. In this nondialed mode, the DTR output and RTS
output act exactly the same. Refer to the V.35 State machine
descriptions in this appendix for more information on these signals.
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 ...