Avaya Nortel Communication Server 1000 Manual page 286

286 Configuration of IP Telephony nodes using Element Manager
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Copyright © 2003–2008, Nortel Networks
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Figure 64
VGW and IP phone codec profile window
Under VGW and IP phone codec profile, leave the values at their
default settings unless directed to change them by Nortel Field
Support.
a. Enable Echo canceller: The echo canceller is enabled by
default. Do not uncheck this box. Never disable echo canceller
unless directed by Nortel Field Support.
b. Echo canceller tail delay: Select the maximum value available.
The default value is 128ms. Never reduce the echo canceller
value unless directed by Nortel Field Support.
c. Voice activity detection threshold: The default value is –17db.
The range is –20db to +10db.
d. Idle noise level: The default value is –65db. The range is
–327db to +327db.
e. DTMF Tone detection: Ensure this is checked to enable DTMF
tone detection. This is enabled by default.
f. Enable V.21 FAX tone detection: Ensure this is checked to
enable V.21 FAX tone detection. This is enabled by default.
g. FAX maximum rate: The FAX maximum rate is one of the
following values: 2400, 4800, 7200, 9600, 12 000, or 14 400.
The default value is 14400 bps.
h. FAX playout nominal delay: The default value is 100 ms. The
range is 0ms to 300ms.
i. FAX no activity timeout: The default value is 20 seconds. The
range is 10 seconds to 32000 seconds.
Nortel Communication Server 1000
IP Line Fundamentals
NN43100-500 02.02 Standard
Release 5.5 4 February 2008