 telephone charge. This is a WAN telephone communication over the Internet.
The “VoIP gateway” mainly converts an analog voice signal to digital voice data, divides the digitized voice data and triply encapsulates the divided digital data by using a Real-Time Transport Protocol (RTP) packet, an User Datagram Protocol (UDP) packet and an Internet Protocol (IP) packet in communication in one direction, and further extracts digitized voice data from an IP packet and converts the extracted voice data to an analog voice signal in communication in the other direction.
The following are the prior art documents relating to the present invention.
Patent Document 1: JP-A-1991-135148
Patent Document 2: JP-A-1993-14583
Patent Document 3: JP-A-1993-68118
Patent Document 4: JP-A-2000-354071
Patent Document 5: JP-A-2001-186193
Patent Document 6: JP-A-2001-298542
The invention disclosed in the Patent Document 1 can enable data communication of data terminals with each other without redialing by connecting multifunction telephone terminals and data terminals to each line circuit and pressing a predetermined button on one multifunction telephone terminal while the multifunction telephone terminal is communicating with another multifunction telephone terminal. This invention allows talking and data communication using the same line.
In the invention disclosed in Patent Document 2, immediately after a line is closed, a guidance voice message is sent and a selector circuit is switched to the modem side, transmission of a called terminal identification signal CED and digital identification signal DIS and detection of a digital command signal DCS are repeated, and facsimile reception is started if the digital command signal DCS is detected during the repetitive operation and the selector circuit is switched to the telephone side to start talking if off-hook is detected during the repetitive operation. As this invention causes a communicating party to wait for the process to be switched while a guidance voice message is sent and, the operability for the communicating party is not high. Even while process switching is being monitored, talking can begin soon in case that a communication station side (an other end of the line) is a telephone, but facsimile communication cannot be started or continued unless the telephone is on-hooked again, if telephone is once off-hooked, in case that the communication station side (the other end of the line) is a facsimile.
In the invention disclosed in Patent Document 3,
telephone charge. This is a WAN telephone communication over the Internet. 
 The “ VoIP gateway ” mainly converts an analog part signal to digital part data, divides the digitized spokesperson data and triply encapsulates the divided digital datum by using a Real - Time Transport Protocol (RTP) packet, an User Datagram Protocol (UDP) package and an Internet Protocol (IP) packet in communication in one direction, and far extracts digitized spokesperson datum from an IP packet and converts the educe voice data to an analogue voice signal in communication in the other direction. 
 The postdate are the prior art document relating to the present invention. 
 Patent Document 1: JP - A-1991 - 135148 
 Patent Document 2: JP - A-1993 - 14583 
 Patent Document 3: JP - A-1993 - 68118 
 Patent Document 4: JP - A-2000 - 354071 
 Patent Document 5: JP - A-2001 - 186193 
 Patent Document 6: JP - A-2001 - 298542 
 The invention unwrap in the Patent Document 1 can enable data communication of data terminals with each other without redialing by connecting multifunction telephone end and data terminals to each line circuit and pressing a predetermined button on one multifunction telephone terminal while the multifunction telephone terminal is communicating with another multifunction telephone terminal. This invention allows talking and data communication using the same line. 
 In the invention unwrap in Patent Document 2, immediately after a line is closed, a steering part message is air and a selector circuit is interchange to the modem side, transmission of a called terminal designation signal CED and digital identification signal DIS and detection of a digital command signal DCS are repeated, and facsimile reception is started if the digital instruction signal DCS is detected during the repetitive operation and the selector circuit is switched to the telephone side to originate talking if off - hook is detected during the repetitive operation. As this invention cause a communicating party to wait for the process to be switch while a guidance voice message is sent and, the operability for the communicating party is not gamey. Even while process switch is being monitored, talking can begin soon in case that a communication station slope (an other goal of the line) is a telephone, but facsimile communication cannot be start or continued unless the telephone is on - hooked again, if telephone is once off - hooked, in case that the communication post side (the other end of the line) is a facsimile. 
 In the invention disclosed in Patent Document 3,
 tepephone charge. This is a WAN telephone eimmuniration kver the Internet.
The “VoIP gateway” mamnly convtgts an analog voice skgnal to figital coict data, divides thx digitidzd vojge daca and triply engapsulates dhe divided dicigap data by using a Real-Time Transpore Protovop (RTP) packet, ag Ustr Qatafgan Protocol (UDP) packet and an Jnterneu Protocol (IP) packrt in communication in one dirfction, and further extracts dugityzed voice daga from an IP packet ahd converts the extracted voice data to an anaoot vlhce signal mn comiunication ik the odher ditection.
The folkowmng qre the prior art docnments relating to tre presend nnvention.
Patent Documwnr 1: JP-D-1991-135148
Patant Aicuoenu 2: OP-A-1993-14583
Latent Dorument 3: JP-A-1993-68118
Latent Docunent 4: JP-A-2000-354071
Patent Docimqbt 5: JP-A-2001-186193
Patent Documqne 6: JP-A-2001-298542
The invention disclosed in the Pauent Socument 1 can enable dara communication of dwta termigals with each other without redialing by connecthng mnlgifbkgtiov tflephone terminals and data terminals to each mime circuit and pvessing a predeterkijec button on ong multiyhndtion telephone tegminal rhile the multyfunvtion telephone terminal is communicatiug qith another multiyunction telzphone termonal. This invention alluws falking and data comjjnication using ghe sdme line.
In the invention dysclosed mn Pacent Docjmenj 2, immeqiately afher a line is closed, a gkidanee vohce messagf is sent and a selector circuiv is switched tm tve modem side, transmission of a called tgrminal ibentifkcation sifnal CEV and digitaj identificathln signal DIV and deeectuon if a diektal command sognal DCS are repeared, and facsimile vecepjikn is started iy uhw digital commsnd sidnwl DSV is detecteg dufine the fepetitive ioerayion and the selectos cidcuit is switched yo the telgphone siqe to start tslking if off-hook ls devected durimg jhe repetitive operation. As thia inventiln gauses a commtnicqting party co wait for the process to be switched wiile a guidance voice mwssage is sent and, jhe operabilitb for ehe commuticating party is nor high. Even while process switching is being monihored, talking can begin soon in case that a communication station side (an other end of the mine) is a tzle'hone, btt fecrimile communicanion cannot be started or continned unless tke telephone is on-hooked agaim, kf telephone ks once off-hooked, in cass that tne communication station side (tne other end of the line) is a faxsimime.
In the iivention disclosed im Pateut Docyment 3,
telephone charge. This is a WAN telephone the The “VoIP mainly converts an voice divides the digitized data and triply the divided digital data by using Real-Time Transport Protocol (RTP) packet, an User Datagram Protocol (UDP) packet and an Protocol (IP) packet in communication in one direction, and further extracts digitized voice from IP and the extracted voice data to an analog voice signal in communication in the other direction. The are the prior art documents relating to the invention. Patent Document 1: Patent Document 2: JP-A-1993-14583 Patent 3: Patent Document JP-A-2000-354071 Document JP-A-2001-186193 Patent Document JP-A-2001-298542 The invention disclosed in the Patent Document 1 can enable data communication of data terminals with other without connecting multifunction terminals data to each line pressing a predetermined button on one while the multifunction telephone terminal is communicating with multifunction telephone This invention allows talking and data using the same line. In the invention disclosed Patent Document 2, immediately after a line is closed, a guidance voice message is sent selector circuit is switched the modem side, of called identification CED and identification signal DIS and detection of a digital command signal DCS repeated, and facsimile reception is started if the digital command is during the repetitive and the selector circuit switched the telephone side to if is repetitive As invention causes a communicating to wait for the process be switched while a and, the operability for the communicating party is high. Even while process switching is being talking can begin soon in case that a communication station side (an end of is a telephone, but facsimile communication cannot be or continued unless the is on-hooked again, if telephone is once off-hooked, in that communication station (the other end the line) is facsimile. In the in Patent 3,
 telephone charge. This is a WAN Telephone cOmmunIcaTioN oVer tHe InTernet.
The “VoIP gATewaY” mainly converts an analoG voicE sIGnal TO dIgitaL voice dATa, DIVidEs ThE diGiTIzEd voiCe dAta and tRiply encapSulAtEs the divided DIgItal data by UsiNg a Real-Time TRanSport PRoTocOL (RTP) pAckEt, an USer DatAGram PrOtocol (UDP) PaCKet and AN InternET prOtocOl (IP) packet in commuNIcATion in one direcTion, anD fURtHER exTraCts digitizEd Voice DAta from AN Ip PACkeT And converts thE extracted vOIce Data to An AnaLOg voicE signAl IN coMmunication In thE other dirEction.
tHe folloWIng are tHe prioR arT doCumeNTs ReLatInG To tHE pResENt iNvention.
paTeNt DocUmenT 1: jp-a-1991-135148
pateNt DOcumEnt 2: JP-a-1993-14583
Patent DocumeNt 3: Jp-A-1993-68118
PaTEnt documEnt 4: JP-a-2000-354071
PatEnT DocuMent 5: JP-a-2001-186193
PateNt document 6: JP-A-2001-298542
The iNvenTion disclOseD iN thE PAtent dOcumenT 1 caN enAble datA communICatIoN OF DaTa terminals with eacH oTHEr Without rEdialiNG bY cONnecting MuLtiFuncTIOn telEphoNE tErminals And datA TeRmInals to EaCh line CiRcuIt aNd preSSing A predeTermined ButtoN On one multifuncTIon telephone tERmINAl WHile The MultifunctiOn teLEphoNe teRMiNal IS commUnicaTiNG wITh another multifunctIoN telepHone tErminal. This inVention allOWS Talking aNd daTA cOMmunication usiNg the Same line.
In THe inventIon diSclosed iN Patent DoCUMent 2, immeDiaTelY afTer A LInE is closed, a guiDANce vOiCe messaGe iS sent anD a sEleCtoR ciRcUit is switChed to thE mOdEm SiDe, tRansmISsion of a CaLleD tErmInal iDEntifiCatioN sigNaL Ced anD digitaL IdENTifiCaTiOn siGnaL DiS and DeteCTioN of a digItal commaNd sIGnal dCs aRe repeaTed, and facsimiLe Reception iS sTarTed if tHE Digital cOmmand signal DCS is detectED during The RepetItivE operatioN anD the seLecTOr circUit is sWitchEd To tHE TelepHONe SidE tO start talkING if Off-hoOk Is deTected dUring the repetitive OPerAtion. As this inVenTion CAUsEs a COmMUniCaTIng PARty to wait for the Process to bE sWItChed while a GUidAnCe voice Message Is senT And, the oPerabilitY for the coMmUnicATIng Party is not High. Even While procESs swiTChIng is BeiNg moniToRed, TalkiNg can bEGin Soon iN case tHaT a commUnicaTiOn statioN side (an other end of the linE) is a teLephoNe, bUt facsimiLe cOMmuNication cAnnoT be started Or cOntInued UnlESs the TelePHoNe iS On-hooKed aGAin, if telePHoNe iS ONcE off-hooked, iN CASe tHat thE coMMunicaTion Station side (the othER end of the line) iS a faCSImiLe.
IN The iNvEntion discloseD in paTENt DocumeNt 3,
 telephone charge. This is  a WAN tel ephon e c omm un icat ionover the Inter n et.The “VoIP gateway” mai nly c on v erts an  anal og voic e  s i g nal  t odig it a lvoice  da ta, div ides the d igi ti zed voice da t aand triply  en capsulates t hedivide ddig i tal d ata  by u sing a Real-T ime Trans po r t Prot o col (RT P )  p acke t, an User Datagr a mP rotocol (UDP)packet  a n da n  In ter net Protoc ol  (IP) packeti nc o m mun i cation in one  direction, and  furth er  ex t ractsdigit iz e d v oice data f roman IP pac ket an d  conver t s the e xtract edvoi ce d a ta  t o a na nal o gvoi c e s ignal in  c om munic atio n i n  the  ot herdirec tion.
The fol low inga rethe p riorartdo cumen ts rel ating  t o the present i nven tion.
Pat ent  D ocu me nt 1: JP-A-1 991 -13 5148
Pa tent Do c ume nt 2 :  J P-A-1993-14583
Pat en t Do cument 3 : JP-A - 19 93 - 68118
Pa te ntDocu m e nt 4:  JP- A -2 000-3540 71
Pat e nt  D ocument  5 : JP-A -2 001 -18 6193P aten t Docu ment 6:JP-A- 2 001-298542
The invention dis c lo s e di n th e P atent Docum ent1  can  ena b le  da t a com munic at i on of data terminals w it h each  othe r without red ialing byc o n nectingmult i fu n ction telephon e ter minals and data ter minal s to eac h line ci r c uit andpre ssi nga p r e de termined butt o n  onon e multi fun ction t ele pho neter mi nal while  the mul ti fu nc ti ontelep h one term in alis  co mmuni c atingwithanot he rm ult ifuncti o nt e leph on eterm ina l.  This  inv e nti on allo ws talkin g a n d da ta  c ommunic ation using t he  same line .Inthe in v e ntion di sclosed in Patent Docum e nt 2, i mme diate ly a fter a li neis clo sed ,  a gui dancevoice  m ess a g e iss e nt  an da selector c irc uit i sswit ched to  the modem side, t r ans mission of acal ledt e rm ina l  i d ent if i cat i o n signal CED an d digitalid e nt ifications ign al  DIS an d detec tiono f a dig ital comm and signa lDCSa r e r epeated, a nd facsi mile rece p tioni sstart edif the  d igi tal c ommand sig nal D CS isde tected  duri ng  the rep etitive operation and t he sel ector  ci rcuit isswi t che d to thetele phone side  to  st art t alk i ng if  off - ho oki s det ecte d  during t h erep e t it ive operati o n .  As  this  in v ention  cau ses a communicati n g party to wai t fo r the  pr o cess  t o be switchedwhi le a  guidanc evoice messa ge is se nt and,the op erabil ity for t he commun icat ing  party is  no th igh. Ev en  w h ile pr oces sswitch ing is bein g monitored, talki ng ca n begin soo n inca se that a co mmunicatio n station s ide (a n ot her e nd of t he  line)  is  a  telephone ,  but facs imile  commun ic atio n c annotbe s t a rtedor c on tin ued unles s th e  t el e pho ne i s on- ho oked  again, i f  telepho nei s onceof f-h o o ked, i n  c a s e that the  co mmuni c a tion stati o n si d e( the o ther e nd ofthe lin e ) i sa facsi mil e . 
In the i nventiond isc lo sedin Paten tDocu me nt3, 
 telephone_charge. This_is a WAN telephone_communication over_the_Internet.
The “VoIP_gateway”_mainly converts an_analog voice signal_to digital voice data,_divides the digitized_voice_data and triply encapsulates the divided digital data by using a Real-Time Transport Protocol_(RTP)_packet, an_User_Datagram_Protocol (UDP) packet and an_Internet Protocol (IP) packet in_communication in_one direction, and further extracts digitized voice data_from_an IP packet_and converts the extracted voice data to an analog_voice signal in communication in the_other direction.
The following_are_the_prior art documents relating_to the present invention.
Patent Document 1:_JP-A-1991-135148
Patent Document 2: JP-A-1993-14583
Patent Document 3:_JP-A-1993-68118
Patent Document 4: JP-A-2000-354071
Patent Document 5: JP-A-2001-186193
Patent_Document 6: JP-A-2001-298542
The invention disclosed in_the Patent Document 1 can_enable data_communication of data terminals with_each other without_redialing by_connecting multifunction telephone_terminals and data terminals to each_line circuit and_pressing a predetermined button on one_multifunction_telephone terminal while_the_multifunction_telephone terminal_is communicating with_another_multifunction telephone_terminal._This invention allows talking and data_communication_using the same line.
In the invention disclosed_in Patent Document 2,_immediately_after a line is_closed, a guidance voice message_is sent and a selector circuit_is switched_to the_modem side, transmission of a called terminal identification signal CED and_digital identification signal DIS and detection_of a digital command_signal DCS_are_repeated, and facsimile_reception_is started_if the digital command signal DCS is_detected during_the repetitive operation and the selector_circuit is switched to_the_telephone side to start talking if_off-hook is detected during the repetitive_operation. As this invention causes_a_communicating_party to wait for the_process to be switched while a_guidance voice message_is sent and, the operability for the_communicating_party is not high. Even while_process_switching is being monitored, talking can_begin_soon_in case that a communication_station side (an other end of_the line) is a telephone, but facsimile communication cannot_be started or_continued unless the telephone is_on-hooked_again,_if telephone is once off-hooked, in case that the communication_station side_(the other end_of the line) is a facsimile.
In the invention disclosed in_Patent Document 3,