Abstract: A network equipment communicates with customer premises equipment (CPE) through a primary path and a secondary path. The network equipment provides heartbeat packets for the CPE to obtain response times corresponding to the primary and secondary paths; then calculates time differences and capacity of the primary path or the secondary path; and at last switches a path to another path according to the time differences and the capacity of the primary path or the secondary path.

Abstract: A network equipment communicates with customer premises equipment (CPE) through a primary path and a secondary path, and includes a timing module, a processor, a switching module and a calculating module. The timing module provides heartbeat packets for the CPE to obtain response times corresponding to the primary and secondary electrical paths. The switching module switches the primary path or the secondary path. The calculating module calculates time differences and capacity of primary path or the secondary path. When the timing module reaches a preset retransmission timeout, the switching module switches to the secondary electrical path from the primary electrical path. When the first response time is less than the third response time, the second response time is less than the fourth response time and the first capacity exceeds the second capacity, the switching module switches to the primary electrical path.

Abstract: A network equipment is in communication with customer premises equipment (CPE) through a primary electrical path and a secondary electrical path, and includes a timer, a processor and a switching device. The timer provides heartbeat packets for the CPE via the primary electrical path and the secondary electrical path to obtain a first response time and a second response time corresponding to the primary and secondary electrical paths. The switching device is switched to the primary electrical path or the secondary path under the control of the processor. When the timer reaches a preset retransmission timeout, the processor controls the switching device to be switched to the secondary electrical path from the primary electrical path. When the second response time exceeds the first response time at least twice in succession, the processor enables the switching device to be selectively switched to the primary electrical path.

Abstract: A method run in a gateway for detecting a communication link between a called telephone and a telephone switch is provided. The method firstly detects if a ringer equivalency number (REN) is equal to zero. If the REN equals to 0, the method further determines if each discharge curve of a positive wire and a negative wire of the called telephone complies with a corresponding standard discharge curve, so as to determine if the communication link between the called telephone and the telephone switch has been established.

Abstract: A network equipment is in communication with customer premises equipment (CPE) through a primary electrical path and a secondary electrical path, and includes a timer, a processor and a switching device. The timer provides heartbeat packets for the CPE via the primary electrical path and the secondary electrical path to obtain a first response time and a second response time corresponding to the primary and secondary electrical paths. The switching device is switched to the primary electrical path or the secondary path under the control of the processor. When the timer reaches a preset retransmission timeout, the processor controls the switching device to be switched to the secondary electrical path from the primary electrical path. When the second response time exceeds the first response time at least twice in succession, the processor enables the switching device to be selectively switched to the primary electrical path.

Abstract: A method for reducing noise is in a subscriber line interface circuit of a phone includes detecting a work state of the phone, and reading a voltage on hook on the tip wire when the phone is in the on hook state. Voltages of an off hook state on the tip wire and a voltage off hook state on the ring wire are read when the phone is in the off hook state, and calculation of a public voltage based on the voltages in the register, and loading the public voltage on the ring wire are done. The public voltage on the ring wire are converted into oscillatory voltages on the ring wire in symmetric wave forms having phases opposite to those on the tip wire, when the phone is in the pulse dialing state.

Abstract: A router and method for configuring multiple Internet Protocol addresses includes setting at least two IP addresses for a local user terminal, and mapping the IP addresses to a domain name of a remote user terminal. A router advertisement packet that includes the IP addresses is generated and transmitted to the local user terminal to configure the IP addresses for the local user terminal. The IP addresses are determined to be configured for the local user terminal successfully if the router receives a router solicitation packet from the local user terminal.

Abstract: A method run in a gateway for detecting a communication link between a called telephone and a telephone switch is provided. The method firstly detects if a ringer equivalency number (REN) is equal to zero. If the REN equals to 0, the method further determines if each discharge curve of a positive wire and a negative wire of the called telephone complies with a corresponding standard discharge curve, so as to determine if the communication link between the called telephone and the telephone switch has been established.

Abstract: A method for reducing noise is in a subscriber line interface circuit of a phone includes detecting a work state of the phone, and reading a voltage on hook on the tip wire when the phone is in the on hook state. Voltages of an off hook state on the tip wire and a voltage off hook state on the ring wire are read when the phone is in the off hook state, and calculation of a public voltage based on the voltages in the register, and loading the public voltage on the ring wire are done. The public voltage on the ring wire are converted into oscillatory voltages on the ring wire in symmetric wave forms having phases opposite to those on the tip wire, when the phone is in the pulse dialing state.