Facsimile method based on network protocol, gateway and facsimile system
A network protocol, fax network technology, applied in methods, gateways and fax systems, based on the field of network protocol fax, can solve problems such as long delay and poor real-time performance, and achieve the effect of reducing delay, enhancing real-time performance and improving user experience
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Embodiment 1
[0024] Embodiment one, see figure 1 Detailed description, figure 1 It is a schematic flow chart of the IP fax method in this embodiment.
[0025] Step 101: Receive a fax request message.
[0026] The fax request message may be in-band signaling or out-of-band signaling, and the in-band signal is a signal for transmitting data within a predetermined frequency band, corresponding to the out-of-band signal.
[0027] If the receiving port is TDM (Time Division Multiplex, Time Division Multiplex), it means that the sending end is an ordinary fax machine, and the fax request message is the fax signal (CNG: Calling Tone) specified in the ITU-T T.30 standard; The port is an IP port type, indicating that the sending end is an IP fax gateway, and the fax request message is a service connection request message conforming to the ITU-T T.37 standard, and the fax connection request message carries the information element identifying the fax service.
[0028] Step 102: Establish a fax dat...
Embodiment 2
[0052] Embodiment two, see figure 2 Detailed description, figure 2 It is a schematic flow chart of the IP fax method in this embodiment.
[0053] Step 201: The TDM receiving port of the IP fax gateway receives a fax request.
[0054] The receiving port is a TDM port type, and the fax request is a fax signal (CNG) specified in the ITU-T T.30 standard.
[0055] Step 202: Allocate idle fax processing resources.
[0056] Step 203: Allocate free storage addresses.
[0057] Step 204: Establish a fax receiving channel and a fax sending channel.
[0058] When the fax receiving channel is established, the fax sending channel can be established in parallel.
[0059] After successfully allocating idle fax processing resources and idle storage addresses, establish a fax receiving channel and connect the fax receiving channel with the allocated fax processing resources and storage addresses. Establish a fax sending channel, and connect the fax sending channel with the assigned stor...
Embodiment 3
[0066] Embodiment three, refer to image 3 Detailed description, image 3 It is a schematic flow chart of the IP fax method in this embodiment.
[0067] Step 301: The IP receiving port of the IP fax gateway receives the fax request.
[0068] The receiving port is an IP port type, and the fax request is a service connection request message conforming to the ITU-T T.37 standard, and the service connection request message carries an information element identifying a fax service.
[0069] Step 302: Allocate free storage addresses.
[0070] Step 303: Allocate idle fax processing resources.
[0071] Wherein, when the sending port is a TDM port type, idle fax processing resources are allocated; when the sending port is an IP port type, this step can be omitted.
[0072] Step 304: Establish a fax receiving channel and a fax sending channel.
[0073] When the fax receiving channel is established, the fax sending channel can be established in parallel. It is also possible to estab...
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