Installation and Upgrades for DEFINITY ONE and
IP600 Internet Protocol Release 10
555-233-109
Issue 6
December 2001
Hardware Additions
6-9Add TN464GP/TN2464BP with Echo Cancellation
6
Keep the default setting for the
EC Configuration:
field of 1. This setting
rapidly minimizes echo when first detected, regardless of the loudness of the
talker’s voice.
6. Test the voice quality on a telephone connected through the TN464GP or
TN2464BP circuit packs and known to have echo to see if the echo was
eliminated.
7. If the echo still exists, set the
EC Configuration:
field to 2, 3, or 4, then
test the voice quality. These settings provide help for the following
scenarios:
■ Setting 2 minimizes speech clipping, but it takes a fraction of a
second longer for the echo to fade.
■ Setting 3 eliminates speech clipping, but a strong echo may take 2
or 3 seconds to fade.
■ Setting 4 minimizes extremely strong echo, very hot signals, or
excessive clipping or breakup of speech from a distant party. It
reduces speech clipping but may allow slight residual echo or more
background noise.
8. If after trying all these settings, the echo still exists, contact technical
support.
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