DNS records added via the "DNS Manager" section in the Control panel take effect only when the domain name uses the DNS service of your hosting account.
In order to add a SRV record, you need to:
1. Log into your Control panel and navigate to the "DNS manager" section.
2. You can apply the changes globally for all domain names parked on the hosting account, or for a particular domain name only. Select the appropriate option from the "Show hostnames of:" drop-down menu.
3. At the bottom of the page you will see an "Add a new record" field. Select "SRV" from the "Type" drop-down menu.
4. An example SRV record that you might need to add is the following:
Record type: SRV
When adding the above record, you need to use the following values:
SRV Target: sip_service.target_domain_name.com
Type in your SRV record and hit the "Submit" button.