AudioCodes Mediant 800B User Manual page 1124

Parameter
[FaxReroutingDelay]
Call Forking Parameters
Forking Handling Mode
forking-handling
[ForkingHandlingMode]
User's Manual
was already sent, a CANCEL (if not connected yet) or a BYE
(if already connected) is sent to release the voice call.

[0] Disable (default)

[1] Rerouting without Delay = Upon detection of a CNG
tone, the device immediately releases the call of the initial
INVITE and then sends a new INVITE to a specific IP
Group or fax server according to the Tel-to-IP Routing
table. To enable this feature, set the CNGDetectorMode
parameter to 2 and the IsFaxUsed parameter to 1, 2, or 3.

[2] Progress and Delay = (Applicable only to ISDN).
Incoming ISDN calls are delayed until a CNG tone
detection or timeout, set by the FaxReroutingDelay
parameter. If the EnableComfortTone parameter is set to 1,
a Q.931 Progress message with Protocol Discriminator set
to 1 is sent to the PSTN and a comfort tone is played
accordingly 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.

[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.
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.
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
1124
Mediant 800B Gateway and E- SBC
Description
Document #: LTRT-10296