CN1011654B - Third-class facsimile repeater - Google Patents

Abstract

The present invention relates to facsimile communication equipment. Before the national public facsimile communication network is set up, a facsimile repeater with store-and-forward function can improve the utilization ratio of a circuit and ensure the quality of a facsimile copy. The present invention mainly comprises a CPU, program residence, an EPROM and an RAM 1 in an operation region, an RAM 2 in a data storage zone, a time circuit, a keyboard display circuit, a modem, a signal processing interface, a network interface and a printer interface circuit. A chain structure is adopted to manage a memory, that is to say, a directory chain, a remainder directory chain and a general list area are set up so that messages are not controlled by storing order and can be selected and sent at random when retransmitted.

Description

Third-class facsimile repeater

The present invention relates to a kind of facsimile communication equipment, relate to a kind of desk-top G3 Fax repeater that utilizes telephone line, the storage of toll lease service road relaying to transmit and receive or rather.

Communication developed country and area have a large amount of facsimile machines, and the opening of telephone network provides good media for facsimile.Facsimile network as Japan is divided into low level net and high-order net, facsimile is that low level net and telephone network merge with the lower part with toll switchbroad TS-FX, real facsimile communication network-high-order net by facsimile signal conversion control apparatus TCAP, fax store transformed device STOC, facsimile data conversion connection device FDIC and altogether road signal net CCS forms, the fax store transformed device that wherein utilizes microcomputer to constitute is a core and key of setting up the bureaufax net.

At present, domestic transformation and the expansion of just being devoted to telephone network, building the bureaufax net considers as long-term goal, past and covering and under little and the situation that circuit quantity is few at the direct distance dialing circuit at no distant date, the main communication by the method for renting line for a long time or temporarily got in touch in the facsimile on private network business, and efficient is low, expense is high; Adopt " land forwardings " mode to solve inevitable facsimile message forwarding problems in the autofax, need through repeatedly landing forwardings sometimes, facsimile message could arrive the destination, thereby is difficult to assurance pair this quality of faxing.

The objective of the invention is to: before the personal use facsimile net with storage forwarding capability of China is not set up, on the current public telephone network, open autofax, utilize artificial fax board to continue, pay this quality and realize that not landing of facsimile message transmit design a kind of and have the fax relay equipment of storing forwarding capability for guaranteeing fax.For example when between A ground and B ground, B ground and C ground the direct-dial telephone circuit being arranged during the no direct-dial telephone circuit in A ground and C ground, if B ground is furnished with fax relay machine of the present invention as the fax relay station, store (rather than landing) as long as the fax manuscript on A ground is delivered to the repeater on B ground, when the circuit on B ground and C ground is unimpeded, again canned data is transmitted to C ground.For making full use of device resource, this fax relay machine also possesses " landing " function simultaneously, i.e. configure printer and interface circuit thereof can print the fax manuscript at any time and become facsimile receiver.

The G3 Fax machine equipment of Japan company of Oki Electric and Sharp Corp's certain model is introduced the subsidiary storage forwarding capability that has, but when transmitting facsimile message, can only first in first out, and do not have the multicast function of (or claiming identical text simultaneously).By the fax relay machine that the object of the invention is implemented, have stronger storage forwarding capability, the facsimile message of being stored is had the forwarding working method of menu mode, that is not promptly stored sequencing restriction accesses forwarding arbitrarily; Can not only point-to-point communication, and can multicast; Be not only applicable to the telephone channel, and be applicable to wireless simplex channel, the facsimile message on the wire message way can also be forwarded on the facsimile machine on the wireless channel.

Accompanying drawing 1, G3 Fax repeater hardware structure diagram

Accompanying drawing 2, G3 Fax repeater software architecture diagram

Accompanying drawing 3, G3 Fax repeater receive the stored program flow chart

Accompanying drawing 4, G3 Fax repeater router flow chart

Describe technology of the present invention in detail below in conjunction with accompanying drawing.

Accompanying drawing 1 is the Third-class facsimile repeater hardware structure diagram, the central processing unit CPU of complete machine and peripheral chip thereof play control and data processing effect, the EPROM unit is the resident district of program, the RAM1 unit is the program Operational Zone, the RAM2 unit is the facsimile data memory block, the time circuit unit comprises the oscillating circuit of clocking, produce circuit and the real-time timing circuit of timer counter interrupt signal, the keyboard-display circuit unit is mainly finished character and is shown, status indications and key order input function, signal processing and NIU are finished the interface of modem and main frame, when repeater is carried out forwarding capability, kind according to transmitted signal, signal is processed and NIU carries out the level adjustment to the modulation signal that MODEM exports, through attenuator, hybrid circuit, become balanced signal after the signal transmission of the routines such as relay transformer is processed and be delivered to outside line L, when repeater is carried out the reception memory function, by the next facsimile signal of outer circuit L, relay transformer through signal processing and NIU becomes non-equilibrium signal, pass through hybrid circuit, amplitude equalizer, delay equalizer and enter the MODEM demodulation, the T line connects telephone set and has disposed on-hook detection circuit, the ringing-current detecting circuit, dial impulse produces circuit and line transformer, and repeater is pressed the CCITTT.30 suggestion and set up contact. The facsimile message that printer interface circuit allows repeater will compress storage is sent to the printer printout behind decoding, the long conversion of the anti-distance of swimming, serial to parallel conversion.

Accompanying drawing 2 is a G3 Fax repeater software architecture diagram, is made up of seven functional modules.Except the initialize routine module, transmission and reception program module, decoding and error-detecting routine module, keyboard display management program module, storage management and stored program module and printout program module are managed by scheduler module.Programmatics crucial in these modules is storage management and stored program module.When repeater received storage, the compression facsimile message through MODEM demodulates found memory space by storage management method on the one hand, was sent to the RAM2 storage, on the other hand by decoding and error-detecting routine is deciphered, error detection and wrong line are handled.One piece of facsimile message receives, if certain page faulted line is in excess of the quota, can make originating party retransmit, till receiving satisfaction.When repeater was transmitted, the person on duty had put the sequence number of message to be sent in advance, and memory manager program finds corresponding memory block according to sequence number, took out the compression facsimile message sign indicating number of zero defect, was sent to MODEM and modulated.

That is not stored sequencing control in order to realize transmitting selects transmission arbitrarily, and the present invention has adopted the chain structure in the storage management, promptly sets up directory chain, residue directory chain and catalogue district in internal memory.

The present invention is divided into RAM2 facsimile data memory space one by one by every capacity of distinguishing the 4K byte and (can chooses wantonly storage district capacity the storage district, use the 4K byte for sake of convenience), to set up catalogue chain link one by one to the data correspondences such as first address in storage district, promptly corresponding one of each chain link forms directory chain to the storage district.Each section directory chain comprise in have next program record chain first address, this section directory chain is pairing to the body word selection of storage district place memory bank and the physical address most-significant byte of the pairing memory of this section directory chain.In the initialize routine this directory chain is pressed the certain format initialization, all there is one-to-one relationship directory chain address and actual data storage implements reason address.Stored messages is not the residue directory chain to the pairing directory chain in storage district, and the first address of residue directory chain is temporary among the residue catalogue first-in-chain(FIC) location buffer unit SMP.

When receiving storage, from SMP, take out residue catalogue first-in-chain(FIC) location, from the directory chain of correspondence, take out the memory bank body word selection in storage district is selected memory bank, from this directory chain, take out physical address again to the storage district, a 4K district obtained 4K bytes of memory district in accordance with regulations, carried out the storage of one piece of facsimile message, if can not deposit this piece message, then from this directory chain, take out the first location of next directory chain again, continue storage.If in 4K distinguishes storage, can deposit this piece information, then that this directory chain is contained next directory chain address is inserted among the SMP as residue catalogue first-in-chain(FIC) location, revise the contained next directory chain address contents of this directory chain again, represent that this piece information finishes to storage district stored at this.When another piece of storage information, repeat said process again, till all reception information stores are finished.

Can find that piece information that will send in order to make when transmitting, the present invention has also opened up a catalogue district that forms by some, and each item No. is corresponding with the serial number of each piece message of being accepted in the catalogue district.Every content includes: store the corresponding catalogue first-in-chain(FIC) of this piece message location, time of receipt, repeating transmission number of times, faulted line line, the information such as memory address of last byte of this piece message.

Further specify to finishing the notion and the effect thereof in the set directory chain of the present invention, residue directory chain, catalogue district below by embodiment.If storage RAM2 total capacity is the 2.048M byte.64 memory banks are arranged, the body word selection is respectively 00,01,02 ... 3E, 3F, the memory capacity of each memory bank is the 32K byte, 2M bytes of memory space is divided into 512 to the storage district by every district 4K byte, 8 such storage are distinguished are arranged on each memory bank, its physical address is respectively 8000H-8FFFH, 9000H-9FFFH, A000H-AFFFH ... F000H-FFFFH.Directory chain is the 2K byte, and four bytes are one group and form 512 catalogue chain links, corresponding 512 to the storage district, the directory chain structure sees Table 1:

In the initialize routine directory chain of 2K byte is pressed as above form initialization.The pairing memory of whole directory chain 4000H-47FCH is sky from 0 body 8000H-63 body FFFFH after the initialization, then this directory chain is the residue directory chain, 4000H is residue catalogue first-in-chain(FIC) location, reception storage along with facsimile message, the residue directory chain also reduces thereupon, and the first location of residue directory chain is temporary in the SMP internal storage location.

The memory field of also having opened up 1600 unit in the embodiment of the invention is as the catalogue district, divide 100, every first address is respectively 4800H, 4810H, 4820H, 4830H ... 4E20H, 4E30H, can store some kinds of information for every, when receiving the message storage, insert corresponding contents, one piece of message of a correspondence, catalogue district form sees Table 2:

Accompanying drawing 3 receives the stored program flow chart for repeater.When repeater receives storage, from SMP, take out the catalogue first-in-chain(FIC) location of residue catalogue first-in-chain(FIC) location earlier as this piece message, from the catalogue district, find out idle again, the time (year, month, day, hour, min, second) of retransmitting number of times, catalogue first-in-chain(FIC) location, reception message is inserted in this free time item, whether program judgment data memory block uses up, use up then alarm, do not use up then with catalogue first-in-chain(FIC) location+2, obtain body word selection to the storage district, with catalogue first-in-chain(FIC) location+3, obtain physical address, begin stored messages then the storage district.If this is filled with to storage district, and message does not also finish, and then takes out next catalogue first-in-chain(FIC) location from this directory chain, repeats among the figure function in 3,4,5,6,7.If message is intact to storage district internal memory at second.Memory physical addresses when program is filled out wrong line number of this message and ENMES in catalogue district respective items.Program is taken out the first location of the next directory chain that is write down in this directory chain and is deposited among the SMP as residue catalogue first-in-chain(FIC) location, again this directory chain first address location contents is filled out 01.Represent that this piece message finishes in this directory chain.

For example in the embodiment of the invention, it is 4000H that repeater receives message storage taking-up residue catalogue first-in-chain(FIC) location from SMP for the first time, + 2 get 00 from the 4002H unit selects memory bank 0 body, + 3 from 4003H unit access to memory physical address most-significant byte 80H, message is stored since 0 body 8000H unit until the 8FFFH unit, message does not also finish then from 4000H, 4001H takes out Unit two next catalogue first-in-chain(FIC) location 4004H, through+2, + 3 operations, message continues storage from 0 body 9000H unit if finish in the 9385H unit, program is inserted 9385H in the corresponding entry in catalogue district (seeing Table 8593 in the 2480AH address location), from 4004H, take out 4008H among the 4005H and be temporary in conduct residue catalogue first-in-chain(FIC) location among the SMP.Change 4004 location contents into 01 simultaneously.If storage record chain (pairing three to the storage district) then fills out 01 with the 4010H unit again, residue catalogue first-in-chain(FIC) location is 4014, if the 3rd piece of message occupies two directory chains, then the 4018H unit fills out 01, and residue catalogue first-in-chain(FIC) location is 401CH, and so continuing all is filled with up to memory bank.In storing process, program has also been filled out the end address of repeating transmission number of times, catalogue first-in-chain(FIC) location, time of receipt, mistake number of lines and the message of each piece message in the catalogue district is every, and between test serial number and catalogue district item No., set up one-to-one relationship, wait to receive when finishing, repeater can print notice value crewman with sequence number, the item No. in catalogue district and the relation of catalogue first-in-chain(FIC) location that receives message with form.

Accompanying drawing 4 is the flow chart of repeater router.When relay station and certain receiving ground set up get in touch after, the crewman is according to aforesaid form for value, notify repeater with message corresponding item No. in the catalogue district that this receiving ground should receive, repeater calculates corresponding address in the catalogue district according to item No., find the catalogue first-in-chain(FIC) location of message, again according to the method identical with when receiving, these first location+2 are got the body word selection and are looked for memory bank, this first location+3 access to memory physical addresss, subsequently just can be by square frame shown in the figure 19,20,21,22,23 all send this piece message, after sending, retransmit number of times and subtract 1, be judged as 0, then return directory chain.

The method of returning directory chain is: at first the content among the SMP is inserted in last chain link of this group directory chain, and first pitch chain address of this group directory chain inserted among the SMP as new residue catalogue first-in-chain(FIC) location, make the directory chain returned and the original residue directory chain new directory chain of formation that links together.In giving an example as described above, after repeater has received three pieces of messages, if transmit second piece of message earlier, program is sent into residue directory chain address 401C temporary among the SMP in last catalogue chain link 4010H of second piece of message, the unit, 4011H two-address, and the first section directory chain address 4008H of second piece of message is sent among the SMP as the new residue catalogue first-in-chain(FIC) location of having returned behind three catalogue chain links.If the order by second piece, the 3rd piece, first piece E-Packets, then the directory chain content is as shown in table 3:

The situation of change of temporary residue catalogue first-in-chain(FIC) location is in the SMP unit:

401C→4008→4014→4000。When repeater receives storage once more, will be undertaken by the order of connection of new directory chain link: 4000 → 4004 → 4014 → 4010 → 4008 → 400C → 4010 → 401C ...

Chain structure in the storage management of the present invention makes not controlled by message storage sequencing, can select message arbitrarily and transmit, flexible, the rapid and utilance height of visit.Before the bureaufax net was not set up, the utilance of the G3 Fax relaying function raising circuit with storage forwarding capability was used at the fax relay station, guaranteed the quality of fax copy.This repeater can be realized multicast by the fax tandem board, adopts broadcast mode and radio station's cooperating, can realize the multicast of wireless mode.

After second piece of message sends the 3rd piece of message in back and sends back first piece of message and send

4000 04 04 04

4001 40 40 40

4002 00 00 00

4003 80 80 80

4004 01 01 14

4005 40 40 40

4006 00 00 00

4007 90 90 90

4008 0C 0C 0C

4009 40 40 40

400A 00 00 00

400B A0 A0 A0

400C 10 10 10

400D 40 40 40

400E 00 00 00

400F B0 B0 B0

4010 1C 1C 1C

4011 40 40 40

4012 00 00 00

4013 C0 C0 C0

4014 18 18 18

4015 40 40 40

4016 00 00 00

4017 D0 D0 D0

4018 01 08 08

4019 40 40 40

401A 00 00 00

401B E0 E0 E0

401C…… …… …… ……

Claims (4)

1, a kind of G3 Fax repeater, the CPU and the peripheral chip thereof that have mainly comprised control and data processing effect, program residence district EPROM, program running district RAM1, facsimile message data storage area RAM2, clocking, the time circuit of timing signal and counting interrupt signal, finish the keyboard-display circuit of demonstration and key order input function, modem, finish the signal processing of main frame and MODEM interface and network interface circuit and finish and land the printer interface circuit of receiving function, it is characterized in that transmitting the facsimile message data and do not stored the storage management of selecting transmission arbitrarily and the chain structure thereof that sequencing influences, comprising:

1) facsimile message data storage area RAM2 is divided into the storage district by a constant volume, each sets up a catalogue chain link to storage district correspondence, each catalogue chain link comprises the first address of next catalogue chain link, the memory physical addresses that this catalogue chain link correspondence is distinguished storage memory bank body word selection and this catalogue chain link correspondence at place, storage district, the catalogue chain link connects to directory chain.

2) the not stored messages of facsimile message data storage area RAM2 is the residue directory chain to the pairing directory chain in storage district, the catalogue of the residue always first-in-chain(FIC) location of keeping among the SMP,

3) the catalogue district that forms by item of facsimile message data storage area RAM2, every content mainly includes test serial number, the first address of used directory chain when receiving the message storage, memory physical addresses when the message storage finishes, time of receipt, message is retransmitted number of times, message mistake number of lines.

2, G3 Fax repeater according to claim 1, when it is characterized in that receiving storage, from SMP, get residue catalogue first-in-chain(FIC) location as catalogue first-in-chain(FIC) location, the body word selection to storage district place memory bank is got in catalogue first-in-chain(FIC) location+2, the physical address in storage district took off a section directory first-in-chain(FIC) location when got catalogue first-in-chain(FIC) location+3 from this catalogue first-in-chain(FIC) location.

3, G3 Fax repeater according to claim 1, when it is characterized in that E-Packeting, find out corresponding catalogue first-in-chain(FIC) location from the catalogue district ,+2 get message memory bank body word selection, + 3 get the message memory physical addresses, get next catalogue first-in-chain(FIC) location from this catalogue first-in-chain(FIC) location.

4, G3 Fax repeater according to claim 1, it is characterized in that it is earlier the content among the SMP to be inserted in last chain link of one group of directory chain that this piece message spent as the first address of next directory chain that message sends the method for returning directory chain of finishing, and inserts among the SMP first chain link address of this group directory chain as new residue catalogue first-in-chain(FIC) location again.

Images