The invention discloses a communication equipment whose inside parts are reliably connected with each other, relating to the communication equipment, which can realize the reliable interconnection communication among frames and among veneers inside the equipment, based on the present hardware configuration and on the premise that the bandwidth utilization is assured. Wherein, a port binding technology is adopted to realize the reliable interconnection of the parts inside the communication equipment; through the port binding, two physical otter boards, which are backups for each other, are bound and communicated to form a logic otter board; service boards inside the frames are all port bound with the two physical otter boards to realize the communication inside the frames, and the logic otter boards among different frames are all interconnected; the physical otter boards inside one frame are also bound and interconnected; on such basis, the service boards or the otter boards can selectports to communicate to realize the average distribution of the traffic load at the ports, and automatically give up the link when the ports are in fault to realize the protection switching of the link grade.