Verbosity is at least 3
Core debug is at least 5
terpsichore*CLI> sip show subscriptions
Peer             User        Call ID      Extension        Last state     Type            Mailbox   
172.16.1.202     sipsma      f6c3b089ea7  207@BLF_Group_1  Idle           dialog-info+xml <none>    
172.16.1.201     siepkes     335dc55de78  201@BLF_Group_1  Idle           dialog-info+xml <none>    
2 active SIP subscriptions