SIP User's Manual 646 Document #: LTRT-12804
Mediant 800 MSBG
10.5 Redirect Number and Calling Name (Display)
The following tables define the device's redirect number and calling name (Display) support
for various ISDN variants according to NT (Network Termination) / TE (Termination
Equipment) interface direction:
Table 10-3: Calling Name (Display)
NT/TE Interface DMS-100 NI-2 4/5ESS Euro ISDN QSIG
NT-to-TE
Yes Yes
Yes Yes
TE-to-NT
Yes Yes
No Yes
Table 10-4: Redirect Number
NT/TE Interface DMS-100 NI-2 4/5ESS Euro ISDN QSIG
NT-to-TE
Yes Yes Yes Yes Yes
TE-to-NT
Yes Yes Yes Yes* Yes
* When using ETSI DivertingLegInformation2 in a Facility IE (not Redirecting Number IE).
10.6 Automatic Gain Control (AGC)
Automatic Gain Control (AGC) adjusts the energy of the output signal to a required level
(i.e., volume). This feature compensates for near-far gain differences. AGC estimates the
energy of the incoming signal (from the IP or PSTN, determined by the parameter
AGCRedirection), calculates the essential gain, and then performs amplification. Feedback
ensures that the output signal is not clipped. You can define the required Gain Slope in
decibels per second (using the parameter AGCGainSlop) and the required signal energy
threshold (using the parameter AGCTargetEnergy).
When the AGC first detects an incoming signal, it begins operating in Fast Mode, which
allows the AGC to adapt quickly when a conversation starts. This means that the Gain
Slope is 8 dB/sec for the first 1.5 seconds. After this period, the Gain Slope is changed to
the user-defined value. You can disable or enable the AGC's Fast Mode feature, using the
ini file parameter AGCDisableFastAdaptation. After Fast Mode is used, the signal should
be off for two minutes in order to have the feature turned on again.
To configure AGC, see ''Configuring the IP Media Settings'' on page 107.
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