AudioCodes Mediant 800B - Page 1255

Version 7.2 1255 Mediant 800B Gateway & E-SBC
User's Manual 72. Configuration Parameters Reference
Parameter Description
When the device receives a SIP INVITE, it checks the FXO
line polarity. If the polarity is "Reversed", it skips this FXO line
and goes to the next line.
Note:
 For the parameter to take effect, a device reset is required.
 To take advantage of this new feature, configure all FXO
lines as a single Trunk Group with ascending or
descending channel select mode, and configure routing
rules to route incoming INVITE messages to this Trunk
Group.
 The parameter is applicable only to FXO interfaces.
Enable Polarity Reversal
configure voip > sip-definition
settings > polarity-rvrsl
[EnableReversalPolarity]
Global parameter enabling the Line Polarity Reversal feature
for call release.
You can also configure the functionality per specific calls,
using Tel Profiles (TelProfile_EnableReversePolarity). For a
detailed description of the parameter and for configuring the
functionality in the Tel Profiles table, see Configuring Tel
Profiles on page 473.
Note:
 The parameter is applicable to FXS and FXO interfaces.
 If the functionality is configured for a specific Tel Profile,
the settings of the global parameter is ignored for calls
associated with the Tel Profile.
Enable Current Disconnect
configure voip > sip-definition
settings > current-disc
[EnableCurrentDisconnect]
Global parameter enabling call release upon detection of a
Current Disconnect signal.
You can also configure the functionality per specific calls,
using Tel Profiles (TelProfile_EnableCurrentDisconnect). For
a detailed description of the parameter and for configuring the
functionality in the Tel Profiles table, see Configuring Tel
Profiles on page 473.
Note:
 The parameter is applicable to FXS and FXO interfaces.
 If the functionality is configured for a specific Tel Profile,
the settings of the global parameter is ignored for calls
associated with the Tel Profile.
configure voip > interface fxs-fxo >
polarity-reversal-type
[PolarityReversalType]
Defines the voltage change slope during polarity reversal or
wink.
 [0] = (Default) Soft reverse polarity.
 [1] = Hard reverse polarity.
Note:
 The parameter is applicable only to FXS interfaces.
 Some Caller ID signals use reversal polarity and/or Wink
signals. In these cases, it is recommended to set the
parameter PolarityReversalType to 1 (Hard).
 For the parameter to take effect, a device reset is required.