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MERLIN LEGENDCommunications System Release 6.1
System Planning
555-661-112
Issue 1
August 1998
Data Communications
Page 5-16About Data and Video Communications
5
Data Hunt Group Configurations 5
The following DHG configurations work on the system:
■ ISDN Terminal Adapters. Allows communications with the local host
computer or a workstation (gateway) to a LAN.
■ Modems. Allows communications with the local host computer or a
workstation (gateway) to a LAN.
Video Systems 5
A video system is a hardware configuration that provides video teleconferencing.
The video systems use both B-channels (2B Data) associated with an MLX port to
achieve data rates of up to 128-kbps when using PRI or NI-1 BRI facilities, and
112-kbps when using T1 Switched 56 facilities.
There are two basic types of video teleconferencing:
■ Personal Video Conferencing. This type, also referred to as Desktop
Video Conferencing, typically is a single user communicating with another
individual using their PC.
■ Group Video Conferencing. This type, as the name implies, allows larger
groups of people to communicate with another group at a different location.
Personal Videoconferencing 5
A personal videoconferencing system typically consists of a video camera and an
audio unit connected to a PC. The PC connects directly to any available MLX port
on a 408 MLX or 008 MLX module by way of a BRI interface card.
NOTE:NOTE:NOTE:
When using the 008 MLX or 408 GS/LS-MLX module for data or video, you
must use Version 28 of the module.
The MLX port must be configured as a 2B Data port in order to provide the
necessary high-speed data connection needed to support video applications. The
network facilities used by the endpoint connected to the MLX port may be PRI, T1
Switched 56 (both provided by the 100D module), or NI-1 BRI (provided by the
800 NI-BRI module) facilities.
NOTE:NOTE:NOTE:
Some applications also provide data and application sharing and transfer
capabilities (video collaboration) in addition to video conferencing.
This configuration, in which the personal video system is the only device
connected to the MLX port, is called the Standalone configuration. Some personal
video systems also offer the capability to support a Passive Bus configuration.
See Figure 5–6 on page -18
for a sample connection diagram.