how can many channels can be brigde to the same channel at the same time ????

gate1*CLI> show channels
        Channel  (Context    Extension    Pri )   State Appl.         Data
       Zap/98-1  (from_dialogic s            1   )      Up Bridged Call  Zap/23-1
       Zap/23-1  (from_bell  1879         2   )      Up Dial          Zap/g5/1879
       Zap/98-1  (from_dialogic s            1   )      Up Bridged Call  Zap/4-1
        Zap/4-1  (from_bell  2711         2   )      Up Dial          Zap/g5/2711
       Zap/97-1  (from_dialogic s            1   )      Up Bridged Call  Zap/15-1
       Zap/15-1  (from_bell  6115         2   )      Up Dial          Zap/g5/6115
       Zap/98-1  (from_dialogic s            1   )      Up Bridged Call  Zap/2-1
        Zap/2-1  (from_bell  9799         1   )      Up Dial          Zap/g5/9799
       Zap/98-1  (from_dialogic s            1   )      Up Bridged Call  Zap/18-1
       Zap/18-1  (from_bell  5640         2   )      Up Dial          Zap/g5/5640
10 active channel(s)