AudioCodes Mediant 500 MSBR, Руководство пользователя

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Version 7.2 1191 Mediant 500 MSBR
User's Manual 74. Configuration Parameters Reference
Routing table rules.

[3] Connect and Delay = (Applicable only to ISDN) Incoming
ISDN calls are delayed until a CNG tone detection or timeout,
set by the FaxReroutingDelay parameter. A Q.931 Connect
message is sent to the PSTN. If the EnableComfortTone
parameter is set to 1, a comfort tone is played to the PSTN.
When the timeout expires, the device sends an INVITE to a
specific IP Group or to a fax server according to the Tel-to-IP
Routing table rules.
Note: The parameter has replaced the EnableFaxRerouting
parameter. For backward compatibility, the EnableFaxRerouting
parameter set to 1 is equivalent to the FaxReroutingMode
parameter set to 1.
[FaxReroutingDelay] Defines the maximum time interval (in seconds) that the device
waits for CNG detection before re-routing calls identified as fax
calls to fax destinations (terminating fax machine).
The valid value range is 1-10. The default is 5.
Call Forking Parameters
Forking Handling Mode
forking-handling
[ForkingHandlingMode]
Determines how the device handles the receipt of multiple SIP 18x
forking responses for Tel-to-IP calls. The forking 18x response is
the response with a different SIP to-tag than the previous 18x
response. These responses are typically generated (initiated) by
Proxy / Application servers that perform call forking, sending the
device's originating INVITE (received from SIP clients) to several
destinations, using the same Call ID.

[0] Parallel handling = (Default) If SIP 18x with SDP is received,
the device opens a voice stream according to the received SDP
and disregards any subsequently received 18x forking
responses (with or without SDP). If the first response is 180
without SDP, the device responds according to the
PlayRBTone2TEL parameter and disregards the subsequent
forking 18x responses.

[1] Sequential handling = If 18x with SDP is received, the
device opens a voice stream according to the received SDP.
The device re-opens the stream according to subsequently
received 18x responses with SDP, or plays a ringback tone if
180 response without SDP is received. If the first received
response is 180 without SDP, the device responds according to
the PlayRBTone2TEL parameter and processes the
subsequent 18x forking responses.
Note: Regardless of the parameter setting, once a SIP 200 OK
response is received, the device uses the RTP information and re-
opens the voice stream, if necessary.
Forking Timeout
configure voip > gateway
advanced > forking-timeout
[ForkingTimeOut]
Defines the timeout (in seconds) that is started after the first SIP
2xx response has been received for a User Agent when a Proxy
server performs call forking (Proxy server forwards the INVITE to
multiple SIP User Agents). The device sends a SIP ACK and BYE
in response to any additional SIP 2xx received from the Proxy
within this timeout. Once this timeout elapses, the device ignores
any subsequent SIP 2xx.
The number of supported forking calls per channel is 20. In other
words, for an INVITE message, the device can receive up to 20
forking responses from the Proxy server.