AudioCodes Mediant 500 MSBR, User Manual

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Version 7.2 1075 Mediant 500 MSBR
User's Manual 74. Configuration Parameters Reference
of the DigitalOOSBehaviorForTrunk_x parameter (per trunk setting).

[5] Service and D-Channel = Sends ISDN Service messages to
indicate out-of-service or in-service state and takes the D-channel
down or brings it up. For a detailed description, see option [5] of the
DigitalOOSBehaviorForTrunk_x parameter (per trunk setting).
Note:

The parameter is applicable only to digital interfaces.

When using the parameter to configure out-of-service behavior for all
trunks, you must reset the device for the settings to take effect.

If the ISDN variant does not support the configured out-of-service
option of the parameter, the device sets the parameter to Default [0].
Out-Of-Service Behavior
configure voip > sip-
definition settings > oos-
behavior
[FXSOOSBehavior]
Determines the behavior of FXS endpoints when a Busy Out condition
exists.

[0] None = Silence is heard when the FXS endpoint goes off-hook.

[1] Reorder Tone = (Default) The device plays a reorder tone to the
connected phone / PBX.

[2] Polarity Reversal = The device reverses the polarity of the
endpoint making it unusable (relevant, for example, for PBX DID
lines).

[3] Reorder Tone + Polarity Reversal = Same as options [1] and [2].

[4] Current Disconnect = The device disconnects the current to the
FXS endpoint.
Note:

A device reset is required for the parameter to take effect when it is
set to [2], [3], or [4].

The parameter is applicable only to FXS interfaces.
Retransmission Parameters
SIP T1 Retransmission
Timer
configure voip > sip-
definition settings > t1-re-
tx-time
[SipT1Rtx]
Defines the time interval (in msec) between the first transmission of a
SIP message and the first retransmission of the same message.
The default is 500.
Note: The time interval between subsequent retransmissions of the
same SIP message starts with SipT1Rtx. For INVITE requests, it is
multiplied by two for each new retransmitted message. For all other SIP
messages, it is multiplied by two until SipT2Rtx. For example, assuming
SipT1Rtx = 500 and SipT2Rtx = 4000:

The first retransmission is sent after 500 msec.

The second retransmission is sent after 1000 (2*500) msec.

The third retransmission is sent after 2000 (2*1000) msec.

The fourth retransmission and subsequent retransmissions until
SIPMaxRtx are sent after 4000 (2*2000) msec.
SIP T2 Retransmission
Timer
configure voip > sip-
definition settings > t2-re-
tx-time
[SipT2Rtx]
Defines the maximum interval (in msec) between retransmissions of SIP
messages (except for INVITE requests).
The default is 4000.
Note: The time interval between subsequent retransmissions of the
same SIP message starts with SipT1Rtx and is multiplied by two until
SipT2Rtx.
SIP Maximum RTX
configure voip > sip-
definition settings > sip-
max-rtx
Defines the maximum number of UDP transmissions of SIP messages
(first transmission plus retransmissions).
The range is 1 to 30. The default is 7.