Native bridge problem


can anyone expert help me on this problem. i just starting a asterisk project,. and i facing this problem when i monitor on the asterisk console.

– Starting simple switch on ‘Zap/4-1’
– Executing [92222@test:1] Dial(“Zap/4-1”, “Zap/3/926173555”) in new stack
– Called 3/926173555
– Zap/3-1 answered Zap/4-1
– Native bridging Zap/4-1 and Zap/3-1
– Hungup ‘Zap/3-1’

is it any configuration needed… many thanks for helpful information…