AudioCodes Mediant 800B User Manual page 788

Parameter
Web: Out-Of-Service
Behavior
EMS:FXS OOS Behavior
CLI: oos-behavior
[FXSOOSBehavior]
Retransmission Parameters
Web: SIP T1
Retransmission Timer
[msec]
EMS: T1 RTX
CLI: t1-re-tx-time
[SipT1Rtx]
Web: SIP T2
Retransmission Timer
[msec]
EMS: T2 RTX
CLI: t2-re-tx-time
[SipT2Rtx]
Web: SIP Maximum RTX
EMS: Max RTX
CLI: sip-max-rtx
[SIPMaxRtx]
Web: Number of RTX
Before Hot-Swap
EMS: Proxy Hot Swap Rtx
CLI: nb-of-rtx-b4-hot-swap
[HotSwapRtx]
User's Manual
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.
Notes:

A device reset is required for this parameter to take effect when it is
set to [2], [3], or [4].

This parameter is applicable only to FXS interfaces.
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.
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.
Defines the maximum number of UDP transmissions of SIP messages
(first transmission plus retransmissions).
The range is 1 to 30. The default is 7.
Defines the number of retransmitted INVITE/REGISTER messages
before the call is routed (hot swap) to another Proxy/Registrar.
The valid range is 1 to 30. The default is 3.
Note: This parameter is also used for alternative routing. If a domain
name in the Outbound IP Routing Table or SBC IP-to-IP Routing table
is resolved into two IP addresses, and if there is no response for
HotSwapRtx retransmissions to the INVITE message that is sent to the
first IP address, the device immediately initiates a call to the second IP
address.
788
Mediant 800B Gateway and E-SBC
Description
Document #: LTRT-10278