Cisco
TelePresence
ISDN
Link
Administrator
Guide
D14954.04 ISDN Link Administrator Guide IL1.1.2, MARCH 2015.
Copyright © 2015 Cisco Systems, Inc. All rights reserved.
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Encryption with ISDN Link
About audio and video encryption
When the ISDN Link is used with telePresence endpoints
that support encryption the ISDN Link supports encryption
(AeS-128) on the media flow towards the endpoint and the
ISDN/external network side. Plain telephony calls cannot be
encrypted on the ISDN side.
When H.320 side encryption is enabled (xConfiguration H320
encryption is set to on):
• Maximum two calls are supported on the PRI interface.
• the call setup time is prolonged.
• For references see
xConfiguration H320 Encryption
and
xStatus SystemUnit State MaxNumberOfCalls
.
Note:
the encryption status shown on the endpoint side
oNLY reflects the encryption status for the SIP transport leg
between the endpoint and the ISDN Link.
Encryption indicators
Closed padlock:
the call is encrypted between the paired
endpoint and the H.320 side interface (PRI/BRI/Net).
Open padlock:
No encryption.
ISDN Link
An endpoint
ISDN Link
An endpoint
the encryption status
oNLY reflects the
encryption status for
the SIP transport leg
between the endpoint
and the ISDN Link.
ISDN
network
Contents
Introduction
Getting started
Software upgrade
Status information
System settings
Appendices
Appendices
