AudioCodes Mediant 800B User Manual page 708

Parameter
[SelectSourceHeaderForCalle
dNumber]
Web/EMS: Forking Handling
Mode
[ForkingHandlingMode]
Web: Forking Timeout
[ForkingTimeOut]
User's Manual
Asserted-Identity headers are present, the number is
obtained from the second P-Asserted-Identity header.
c. If only one P-Asserted-Identity header is present, the calling
number is obtained from it.
Notes:

The "From" and "Pai2" values are not case-sensitive.

Once a URL is selected, all the calling party parameters are set
from this header. If P-Asserted-Identity is selected and the
Privacy header is set to 'id', the calling number is assumed
restricted.
Determines the SIP header used for obtaining the called number
(destination) for IP-to-Tel calls.

[0] Request-URI header = (Default) Obtains the destination
number from the user part of the Request-URI.

[1] To header = Obtains the destination number from the user
part of the To header.

[2] P-Called-Party-ID header = Obtains the destination number
from the P-Called-Party-ID header.
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 CallID.

[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 this parameter setting, once a SIP 200 OK
response is received, the device uses the RTP information and re-
opens the voice stream, if necessary.
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.
708
Mediant 800B GW & E-SBC
Description
Document #: LTRT-10274