When you install
NetScaler Gateway as a standalone appliance and users connect with the
NetScaler Gateway Plug-in, NetScaler Gateway supports two-way communication
with Voice over IP (VoIP) softphones.
applications, such as voice and video, are implemented over User Datagram
Protocol (UDP). Transmission Control Protocol (TCP) is not appropriate for
real-time traffic due to the delay introduced by acknowledgments and
retransmission of lost packets. It is more important to deliver packets in real
time than to ensure that all packets are delivered. However, with any tunneling
technology over TCP, such real-time performances cannot be met.
supports the following VoIP softphones.
Secure tunneling is
supported between the IP PBX and the softphone software running on the user
device. To enable the VoIP traffic to traverse the secure tunnel, you must
install the NetScaler Gateway Plug-in and one of the supported softphones on
the same user device. When the VoIP traffic is sent over the secure tunnel, the
following softphone features are supported:
Support for VoIP
softphones is configured by using intranet IP addresses. You must configure an
intranet IP address for each user. If you are using Cisco Softphone
Communication, after configuring the intranet IP address and binding it to a
user, no additional configuration is required. For more information about
configuring an intranet IP address, see
Configuring Address Pools.
If you enable split
tunneling, create an intranet application and specify the Avaya Softphone
application. In addition, you must enable transparent interception.