Explanation/Reference:
Creating the Avaya Aura Media Server Routing Pattern
Procedure
1. On System Manager, click Elements > Routing > Routing Policies .
2. Click New.
3. Type a Name for the Routing Policy.
4. From the SIP Entity as Destination field, click Select.
5. Select the Avaya Aura®
Media Server SIP Entity that you created.
Select the Local Host Name FQDN SIP Entity if you are using High Availability for the Avaya Aura® Media Server routing.
6. Click Commit .
7. Navigate to Home > Elements > Routing > Regular Expressions and click New.
8. In the Pattern field, type ce-msml@<sip-domain>.*
This sip-domain value must match:
* The SIP domain that you entered in the Home > Elements > Routing > Domains page.
* The default SIP domain that you entered on the Avaya Breeze™ Cluster Administration page.
9. Click Commit
https://downloads.avaya.com/css/P8/documents/101014426
References: Deploying Avaya Breeze, Release 3.1, (September 2016), page 55