Configuring Encryption Settings - Cisco TELEPRESENCE ISDN GATEWAYS 2.0 Online Help Manual

Configuring encryption settings

You can configure the ISDN gateway to encrypt the IP "leg", the ISDN leg or both legs of a call. The
encryption technology that the ISDN gateway uses is Advanced Encryption Standard (AES).
To use encryption, you must have the Encryption feature key present on the ISDN gateway. For
information about installing feature keys, refer to
When encryption is in use, the ISDN gateway will encrypt audio, video, and content media (rather than
control encryption or authentication encryption).
To access encryption settings, choose Settings > Encryption. After making any configuration
changes, click Apply changes.
You can:
configure the ISDN gateway to advertise its ability to encrypt connections, such that it will use

encryption on the IP leg if an H.323 endpoint can use AES encryption
configure the ISDN gateway to advertise its ability to encrypt connections, such that it will use

encryption on the ISDN leg if an ISDN endpoint can use AES encryption
configure each dial plan rule to require encryption or to use it optionally if an H.323 or ISDN

endpoint can use AES encryption. Note that if encryption is required on either leg of the call
but the appropriate endpoint cannot use it, the call will be disconnected
configure each dial plan rule to use transparent encryption. When transparent encryption is

used, the ISDN gateway will simulate point-to-point encryption. That is, it will set the
encryption state (enabled/disabled) used on the received call as that to be used on the
outgoing call. That is, the ISDN gateway will attempt to match the encryption state for the
outgoing call to that of the incoming call. For more information, see
plan rules
Field
Field description
IP Whether the ISDN gateway is
encryption able to use encryption on the IP
status
leg of a call or not.
ISDN
Whether the ISDN gateway is
encryption able to use encryption on the
status
ISDN leg of a call or not.
Cisco TelePresence ISDN Gateways v2.0 Online help (Printable format)
Upgrading the firmware.
Usage tips
When Enabled, the ISDN gateway advertises itself as
being able to use encryption for IP. With IP encryption
enabled, for each dial plan you must select whether
encryption is required or optional when using that dial
plan. See Adding and updating dial plan
Note that if you disable encryption here but leave it as
Required in a dial plan rule, then all calls using that
rule will be rejected.
When Enabled, the ISDN gateway advertises itself as
being able to use encryption for ISDN. With encryption
enabled, for each dial plan you must select whether
encryption is required or optional when using that dial
plan. See Adding and updating dial plan
Note that if you disable encryption here but leave it as
Required in a dial plan rule, then all calls using that
rule will be rejected.
Configuring encryption settings
Adding and updating dial
rules.
rules.
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