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ViewStation EX User Guide
114 www.polycom.com
Note
This screen appears only if you selected United States or Canada as
your country on the country screen.
Entering the SPIDs manually. The SPIDs obtained from your
network service provider can be entered manually on the Auto
Detect SPIDs screen. If you are behind an internal phone system
(PBX), you may not need to enter SPIDs.
Automatically detecting the SPIDs. If you do not have any SPID
numbers, highlight the Start icon to have your system try to detect
them automatically. This initiates a process that automatically
detects the SPID numbers associated with your ISDN line. This
process can take as long as ten minutes, but will usually require
three minutes or less. If you are behind a PBX, select the PBX icon.
Your system will try to locate the SPID numbers within the PBX.
If your system is unable to find your SPIDs, make sure that you are
properly connected and that you have entered your ISDN numbers
correctly.
Setting Audio Quality Preference
In most cases, the default setting identified during the initial system
setup will be adequate for quality audio. However, the settings can
be changed based on specific bandwidth requirement in the Audio
Quality Preference screen.
The Audio Quality Preference screen lets you set the call speed
threshold that determines which audio protocol is used. At the
selected speed or lower, the system uses the G.728 audio protocol.
Above the selected speed, the system uses the G.722 audio protocol.
G.722 audio delivers higher quality audio, but uses 48 Kbps of the
video bandwidth. G.728 delivers telephone quality audio and uses
only 16 Kbps of the video bandwidth.