What happen if I enable "Use Fully Qualified Domain Name in SIP Requests" ???

[csedlmeier]

Dear all.

We are planning to enable URI dialing and I found following information in Support Forum:

https://supportforums.cisco.com/t5/collaboration-voice-and-video/configuring-directory-uri-dialing-for-cisco-jabber-step-by-step/ta-p/3159791

There is a taks when I have to enable  "Use Fully Qualified Domain Name in SIP Requests" 

What does this exactly mean ? Do I have to reset something or restart ? Could I get trouble or do the system just add FQDN to SIP Messages ?

Thanks in advanced.

Christian

[Ayodeji Okanlawon]

This feature enables CUCM to send an alphanumeric hostname of the calling party through to the called endpoint as a part of the SIP header information. This enables the called endpoint to return the call using the received or missed call list. If the call is originated from a phone and is being routed on a SIP trunk then the configured Organizational Top-Level Domain (e.g., bell.ca.com) will be used in the Identity headers, such as From, Remote-Party-ID, and P-Asserted-ID.

For example, in this cluster the OTLD is set to bell.ca.com. The SIP request from a phone on this cluster will look like this.

INVITE sip:+442000003154@10.172.211.52:5060 SIP/2.0
From: "Denva Brooks" <sip:+44299212303@bell.ca.com>;tag=10798617~76174c53-
---
P-Asserted-Identity: "Denva Brooks" <sip:+44299212303@bell.ca.com>
Remote-Party-ID: "Denva Brooks" <sip:+44299212303@bell.ca.com>;party=calling;screen=yes;privacy=off

NB: That the From, PAI and RPID headers all have alphanumeric values and the host portion of these headers is the value set in the OTLD.

[csedlmeier]

Thanks for answer.

Is it a must to enable "Use Fully Qualified Domain Name in SIP Requests" for URI dialing ?

[Ayodeji Okanlawon · Accepted solution]

Personally, I dont believe so. Try it without it and see what the behavior is.

[csedlmeier]

Ok thanks. I will try on weekend on my change window. I will enable the sync E-Mail to URI of enduser and in Jabber it is already enable.

I will keep this post updated...

[Jason Aarons]

Any update?