What to do with the SIP client
The application is called SIP Client and is one of the free programs included with our ABCL firmware.[1].
This application allows you to connect your intercom, background music or paging system with your SIP phone system, allowing, for instance, a security guard to make a PA announcement from his hand-held SIP phone, and even activate hardware attached to Barix devices via DTMF codes... whilst patrolling.