AudioCodes Mediant 500L - Configuring Rerouting of Calls to Fax Destinations

Version 7.2 697 Mediant 500L Gateway & E-SBC
User's Manual 35. Routing SBC
Parameter Description
"Country=England", configure the parameter to "Country" only.
Internal Action
internal-action
[IP2IPRouting_InternalAction]
Defines a SIP response code (e.g., 200 OK) or a redirection
response (with an optional Contact field indicating to where the
sender must re-send the message) that the device sends to the
sender of the incoming SIP dialog (instead of sending the call to
another destination). The parameter is applicable only when the
'Destination Type' parameter in this table is configured to Internal
(see above).
The valid value syntax is (case-insensitive):
 For SIP response codes:
Reply(response='<code>')
The following example sends a SIP 200:
Reply(response='200')
 For redirection responses:
Redirect (response='<code>', contact='sip:'+….)
Redirect (contact='…', response = '<code>')
Redirect (contact = 'sip:user@host')
Examples:

The device responds to the dialog with a SIP 300 redirect
response that includes a contact value:
Redirect (response=’300’, contact=’sip:102@host’)

The device redirects the call from the sender to a SIP
Recording Server (SRS):
Redirect(response='302',contact='sip:'+header.to.
url.user+'@siprecording.com')
Note:
 The parameter can be used for normal and alternative routing.
 The response code for redirect messages can only be 3xx.
35.2.1 Configuring Rerouting of Calls to Fax Destinations
You can configure the device to reroute incoming SBC calls identified as fax calls to a new
IP destination. The device identifies a fax call if it detects, within a user-defined interval, a
calling (CNG) tone on the originator side (incoming IP leg). If the device detects a fax call, it
terminates the call and reroutes it using a new INVITE to the new fax destination (new IP
Group). If the initial INVITE that was used to establish the voice call was already sent, the
device sends a CANCEL (if not connected yet) or a BYE (if already connected) to release
the call (with the internal disconnect reason RELEASE_BECAUSE_FAX_REROUTING,
translated to Q.850 reason GWAPP_NORMAL_UNSPECIFIED 31).
Note:
• You must configure the originating fax to use the G.711 coder.
• If the remote side replies with T.38 or G.711 VBD, fax rerouting is not done.
• If both fax rerouting and fax re-INVITE are configured, only fax rerouting is done.
The following procedure describes how to configure fax rerouting, using an example
consisting of three IP Groups.