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Name/username              Host            Dyn Nat ACL Port     Status
polycom                    (Unspecified)               5060     Unmonitored
1 sip peers [1 online , 0 offline]

RebelPBX*CLI> dial 0@testing
    -- Executing Dial("OSS/dsp", "SIP/polycom") in new stack
May 22 00:45:24 NOTICE[5702]: app_dial.c:1029 dial_exec_full: Unable to create channel of type 'SIP' (cause 3 - No route to destination)
  == Everyone is busy/congested at this time (1:0/0/1)