AudioCodes Mediant 1000B - Page 1217

Version 7.2 1217 Mediant 1000B Gateway & E-SBC
User's Manual 65. Configuration Parameters Reference
Parameter Description
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.
[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.