Compatibility - Polycom SoundStation VTX1000 Brochure

determines the line quality and will allow the phone to maximize voice quality and
bandwidth. If the line quality is poor (too much noise or signal loss) the phones will
automatically reduce audio bandwidth, until at very low line qualities they will
revert to normal 3.3 kHz analog mode.
e. Over the digital link an audio channel is opened, codecs are engaged, and two-
way simultaneous wideband speech begins.
Note that a connection between two systems is only wideband when both ends are VTX-
compatible and are operating in this mode. A VTX-compatible system communicating
with another VTX-compatible system is probably operating in the VTX mode, and will
communicate with wideband audio. However, a VTX-compatible system communicating
with a SoundStation Premier, for example, will be constrained by the fact that the Premier
is not VTX-compatible, so it will operate in its conventional narrowband mode. However,
even the narrowband performance and features of the SoundStation VTX 1000 are
superior to those of the Premier.
This also means that for a bridged, or multipoint, call to operate in VTX wideband mode,
the bridge must support this mode. This is because for each endpoint, the bridge itself is
the "other end;" data transfer is not possible directly through the bridge; the data channel is
too sensitive to handle bridge processing directly (this is the same reason that computer
modems cannot communicate through a multipoint bridge call). The bridge must
demodulate the data, and remodulate it on the other participating ports. However, as
more than 70 percent of all business calls today are point to point and so can support VTX
wideband, this is not a serious disadvantage.

Compatibility

The SoundStation VTX 1000 is compatible with many Polycom products via direct
connection, including the following:
• Polycom Lavaliere Wireless Microphone
• Vortex Installed Room Conferencing System
• iPower™ Video Conferencing System
• ViewStation® Video Conferencing System
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UNDER THE HOOD OF THE SOUNDSTATION VTX 1000
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