[Sip-implementors] Diversion header mapping(ISUP to SIP)

[raikkme rrrrr]

Hi all,

According to the draft draft-levy-sip-diversion-08, following translation is
possible.

ISUP/SIP GW
|
--IAM--------------------------------->|
Called Party Number =[phone] |
Redirecting Number =[phone] |
Address Presentation =presentation restricted
Original Called Number =[phone] |
RedirectionInformation: |
Original redirecting reason = Unconditional (1111)
Redirecting Reason = User busy (0001)
Redirection counter = 5 |
|
|--INVITE [phone]------>
| Diversion: <tel:[phone]>
| ;reason=user-busy
| ;privacy="full"
| ;counter=4
| Diversion: <tel:[phone]>
| ;reason=unconditional
| ;counter=1
|
|

In some markets, IAM message is received with only redirecting reason. No
information such as redirection counter/redirecting number/original called
party number received in ISUP.
Will it be still logical to send only the "reason" in diversion header in
the outgoing INVITE? Or is it mandatory to send a number in the Diversion
header?
This has not been explicitly mentioned(ofcourse, its still a draft!)

Thanks,
kumar

[Brett Tate]

Post by raikkme rrrrr
Will it be still logical to send only the "reason" in diversion
header in the outgoing INVITE? Or is it mandatory to send a
number in the Diversion header?

Section 5's ABNF requires a name-addr to be within the diversion entry. However the division entry's name-addr is not required to contain a "number". Thus you can send the Diversion header to communicate the reason and include whatever you think is appropriate to satisfy the name-addr requirement.