Figure 2-8.Quad Bri Network Interface Module (Network Side) - Polycom ViewStation FX4000 User Manual

Chapter 2 - Installing the ViewStation FX/VS4000
Figure 2-8 shows the network side of the Quad BRI network
interface module that connects to the ISDN BRI network.
Figure 2-8. Quad BRI Network Interface Module (Network side)
Special Information
Quad BRI/IMUX. The Quad BRI is also called IMUX (for Inverse
Multiplexer). With the Quad BRI, you can connect up to four ISDN
lines to the video conferencing unit. The Quad BRI allows multi-line
ISDN connections to be "muxed" together to create a higher
bandwidth connection to the far-site device. Each ISDN line adds
128 Kbps to the possible operating line.
ISDN Lines. The ViewStation FX and VS4000 can use up to four
ISDN lines. Note that the ViewStation FX and VS4000 only require a
single functioning ISDN line to operate, but speeds greater than 128
Kbps require the use of additional ISDN lines.
NT-1. If you are not connected to an internal phone system, called a
PBX, you will need to connect the ISDN cables from your
ViewStation FX or VS4000 to the Quad BRI module, to the network
termination (NT-1) device, which is connected to the ISDN wall jack.
For more information about ISDN, refer to the Polycom Office
Integrators' Reference Manual.
Automatic Quad BRI Software Update. The Quad BRI is expected
to have at least the same level of software version as the ViewStation
FX or VS4000. However, if, upon reboot, the ViewStation FX or
VS4000 detects an older software version on the Quad BRI, it will
automatically update the Quad BRI to the same software version.
When this happens, the download is accompanied by an
© Polycom, Inc. 2002 57