AudioCodes Mediant 500L - Page 1182

User's Manual 1182 Document #: LTRT-10532
Mediant 500L Gateway & E-SBC
Parameter Description
Typically, if the RJ-11 cabling is connected correctly (without
crossing, Tip to Tip, Ring to Ring), the Tip line is positive
compared to the Ring line. In this case, set the parameter to
0. With this configuration, the device assumes that the idle
line polarity is Tip line positive.
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 471.
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
471.
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).