Manipulating Redirected And Diverted Numbers For Call Diversion - AudioCodes Mediant 800B User Manual

23.6 Manipulating Redirected and Diverted Numbers for
Call Diversion
You can configure manipulation rules to manipulate the Diverted-to and Diverting numbers
received in the incoming Call Redirection Facility message for call diversion, which is
interworked to outgoing SIP 302 responses. This feature is applicable to the Euro ISDN
and QSIG variants, and to IP-to-Tel calls.
The incoming redirection Facility message includes, among other parameters, the
Diverted-to number and Diverting number. The Diverted-to number (i.e., new destination) is
mapped to the user part in the Contact header of the SIP 302 response. The Diverting
number is mapped to the user part in the Diversion header of the SIP 302 response.
These two numbers can be manipulated by entering the following special strings in the
'Destination Prefix' field of the Redirect Number Tel-to-IP table:

"RN" - used in the rule to manipulate the Redirected number (i.e., originally called
number or Diverting number).

"DN" - used in the rule to manipulate the Diverted-to number (i.e., the new called
number or destination). This manipulation is done on the user part in the Contact
header of the SIP 302 response.
For example, assume the following required manipulation:

Manipulate Redirected number 6001 (originally called number) to 6005

Manipulate Diverted-to number 8002 (the new called number or destination) to 8005
The configuration in the Redirect Number Tel-to-IP table is as follows:
Table 23-5: Redirect Number Configuration Example
Parameter
Destination Prefix
Redirect Prefix
Stripped Digits From Right
Suffix to Add
Number of Digits to Leave
After the above manipulation is done, the device sends the following outgoing SIP 302
response:
SIP/2.0 302 Moved Temporarily
Via: SIP/2.0/TLS 10.33.45.68;branch=z9hG4bKac54132643;alias
From: "MP118 1" <sip:8001@10.33.45.68>;tag=1c54119560
To: <sip:6001@10.33.45.69;user=phone>;tag=1c664560944
Call-ID: 541189832710201115142@10.33.45.68
CSeq: 1 INVITE
Contact: <sip:8005@10.33.45.68;user=phone>
Supported: em,timer,replaces,path,early-session,resource-priority
Allow:
REGISTER,OPTIONS,INVITE,ACK,CANCEL,BYE,NOTIFY,PRACK,REFER,INFO,SUB
SCRIBE,UPDATE
Diversion: <tel:6005>;reason=unknown;counter=1
Server: Audiocodes-Sip-Gateway-IPmedia 260_UN/v.6.20A.043.001
Reason: SIP ;cause=302 ;text="302 Moved Temporarily"
Content-Length: 0
User's Manual
Mediant 800B Gateway and E-SBC
Rule 1
RN
6
1
5
5
402
Rule 2
DN
8
1
5
-
Document #: LTRT-10620