CLI>     -- Starting simple switch on 'Zap/2-1'
    -- Executing Dial("Zap/2-1", "zap/1|1571") in new stack
    -- Called 1
    -- Zap/1-1 answered Zap/2-1
    -- Attempting native bridge of Zap/2-1 and Zap/1-1

Or

 Executing Dial("SIP/202-a861", "zap/1|1571") in new stack
    -- Called 1
    -- Zap/1-1 answered SIP/202-a861