AudioCodes Mediant 500 MSBR, User Manual

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User's Manual 1210 Document #: LTRT-10375
Mediant 500 MSBR
configure voip > interface
fxs-fxo > default-
linepolarity-state
[SetDefaultLinePolaritySt
ate]
Defines the FXO line polarity, required for DID signaling.

[0] = Positive line polarity

[1] = Negative line polarity

[2] = (Default) Auto - The device detects the polarity upon power-up
or upon insertion of the RJ-11 cable, and uses it as a reference
polarity.
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 feature per specific calls, using Tel Profiles
(TelProfile_EnableReversePolarity). For a detailed description of the
parameter and for configuring the feature in the Tel Profiles table, see
Configuring Tel Profiles on page 440.
Note:

The parameter is applicable to FXS and FXO interfaces.

If the feature 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
[EnableCurrentDisconne
ct]
Global parameter enabling call release upon detection of a Current
Disconnect signal.
You can also configure the feature per specific calls, using Tel Profiles
(TelProfile_EnableCurrentDisconnect). For a detailed description of the
parameter and for configuring the feature in the Tel Profiles table, see
Configuring Tel Profiles on page 440.
Note:

The parameter is applicable to FXS and FXO interfaces.

If the feature 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.