Network device and method for re-dialing telephone thereof

Abstract

The invention discloses a network device which connects a plurality of terminal telephone sets and local switches in a communication manner and comprises a storage module, a control module and a digital signal processing module, wherein, the storage module is used for storing a plurality of emergency telephone numbers; the control module is used for detecting public switched telephone network (PSTN) dialing from the terminal telephone sets and judging whether the common calling resource is used up or not when the PSTN dialing is detected; the digital signal processing module is used for receiving PSTN telephone numbers from the terminal telephone sets when the common calling resource is used up and judging whether the PSTN telephone numbers match with the emergency telephone numbers or notand re-dialing the PSTN telephone numbers to the local switches through emergency calling resource when the PSTN telephone numbers match with the emergency telephone numbers. The invention also provides a method for re-dialing telephone of a network device. The network device and the method for re-dialing telephone thereof can ensure that a user can dial emergency telephone under limited callingresources.

Description

technical field [0001] The invention relates to network communication, in particular to a network device and a method for redialing a phone. Background technique [0002] Generally speaking, resources provided by central office network devices such as gateways do not distinguish between ordinary call resources and emergency call resources. For example, if the call resources provided by the central office network device include 128 call channels, all 128 call channels will be It is provided to ordinary users. If 128 users have already used the phone, the 129th user will not be able to make outgoing calls. [0003] However, if the user encounters an emergency and needs to dial a rescue number (such as 110, 119), the phone cannot be used due to insufficient communication resources (such as 128 communication channels are full). Therefore, there is an urgent need for a network device that can ensure that users can make emergency calls under limited communication resources. Con...

AI Technical Summary

Problems solved by technology

[0002] Generally speaking, resources provided by central office network devices such as gateways do not distinguish between ordinary call resources and emergency call resources. For example, if the call resources provided by the central office network device include 128 call channels, all 128 call channels will be It is provided for ordinary users. If there are already 128 users using the phone, the 129th user will not be able to make outgoing calls

[0003] However, if the user encounters an emergency and needs to make a rescue call (such as 110, 119), the phone cannot be used due to insufficient call resources (such as 128 call channels are full)

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