 as TTY devices, allow users to communicate with non-speech sound on a telephone network. Such users include those users who cannot hear and those who cannot speak. Another service, such as Prompted Automatic Callback (PAC), provides users with a voice message informing the user that the line they are calling is busy. For example, the PAC system may provide a message that states “the number you have dialed is busy.” The PAC system may also ask the user if the user wishes to invoke an automatic call back feature to automatically call back the number when the line becomes available.
Prior to the development of automatic callback services, TTY users could recognize a busy signal by observing a determined pattern of flashes of a signal strength light of the TTY device that are produced by the busy signal. When a telecommunications provider provides an automatic callback service such as the PAC service, however, the busy signal is replaced with the announcement stating that the line is busy. Absent the busy signal, TTY users may no longer be able to recognize a busy line. The announcement produces intermittent flashes of the TTY signal strength light indicating that words are being spoken and does not produce the patterned flashes of the busy signal. The intermittent flashing light conveys no specific information to the user, thus the TTY user would be unaware that the line is busy.
Thus, there is a need for an improved communications system that can aid a TTY user in identifying a busy condition even when the communications system uses an announcement service such as the PAC service instead of the busy signal. Mobile computing devices such as mobile telephones and tablet computers have continued to proliferate in recent years. These mobile devices may be equipped with processors, memory, and the capability to communicate through local and wide area networks, including the Internet. Current mobile devices are also capable of executing a wide range of computer programs and software applications. A user of a mobile device may have a personal computer, another mobile device, or multiple other mobile devices that each includes programs and applications. In many cases, the programs and applications on a mobile device should be updated or synchronized regularly by accessing a network or the internet to send or obtain application updates, messaging updates, or other application data updates for synchronization.
A user of multiple mobile devices may desire to update or synchronize application data on the user's devices in various device use scenarios. For example, a user of multiple mobile devices may have different service capabilities for the user's different devices. In particular situations, one of the user's devices may be able
as TTY devices, allow users to communicate with non - speech strait on a telephone net. Such users include those drug user who cannot listen and those who cannot speak. Another service, such as Prompted Automatic Callback (PAC), put up exploiter with a voice message informing the user that the line they are call is busy. For example, the PAC organization may leave a message that states “ the number you have dialed is busy. ” The PAC system may besides ask the user if the user wish to invoke an automatic call back feature of speech to automatically predict back the number when the wrinkle becomes available. 
 Prior to the development of automatic callback service, TTY users could recognize a busy signal by observing a determined pattern of flashes of a signal strength light of the TTY device that are produced by the busy signal. When a telecommunications provider provides an automatic callback service such as the PAC service, however, the interfering signal is replace with the announcement stating that the occupation is interfering. lacking the busy signal, TTY users may no longer be able to recognize a busy line. The announcement produces intermittent flashes of the TTY signal strength inner light indicating that words are being spoken and does not produce the patterned flashes of the interfering signal. The intermittent flashing light conveys no specific information to the user, thus the TTY user would be unaware that the note is busy. 
 Thus, there is a need for an improved communications arrangement that can aid a TTY user in identifying a interfering condition even when the communication system uses an announcement serve such as the PAC service rather of the busy signal. Mobile computer science devices such as fluid telephones and tablet computers have continued to proliferate in late years. These mobile devices may be equip with processors, memory, and the capability to commune through local and wide area networks, including the Internet. Current mobile devices are also capable of executing a across-the-board range of computer program and software applications. A user of a fluid device may have a personal computer, another mobile device, or multiple other mobile devices that each includes programs and applications. In many cases, the programs and application on a fluid device should be updated or synchronized regularly by accessing a network or the internet to send or obtain application updates, message updates, or other application datum updates for synchronism. 
 A user of multiple mobile devices may desire to update or synchronize application data on the user's devices in versatile device use scenarios. For model, a user of multiple mobile devices may have different service capability for the user's different devices. In particular situations, one of the user's devices may be able
 as TTY devices, allow users to communicate with nmn-speedh sound on a telephone network. Such uwers unclude those users whu cannot jear and thoww who cannot speak. Anothsv serrire, such as Promkted Automathc Callback (PAW), orlvides users with a voice message igforminb hhe user that jhe lpnq thsj cre calling is busy. For example, the PAB system may provode a message that states “hhe jumber you have diwled is busi.” Thq PAC system oay also ask the user jf the user wishes to invoke an autokatic call bqck xeature to eutomanically call nsck tha numbet when the linc becmmew available.
Prior to tie development of aujomatic canlyack services, TTY usees coulg rewognkze x bhsb sjgnal hy kbserving z determinee pattern of flashex jd a signal stdength lyght of the TTY device that are produceg bg the busy signal. When q telecommunications krovider pwovides an automatic callback service such as the PAC adrvngc, hodwvfr, the busy signal is replaced with the annougdekekt stating that bhe line is busy. Ansfny the busy sigval, TTV uaers may no longer be ablg to rwcognize w buxy line. The announcement priduces interiuttent flashes of che TTY signcl strgngth kight indicating that wurds are being dpoken ans does not producd tme [atterned flashes of the btsy signao. Thz intermkttemt flafhing lighh conyays no specific invormajion tm the user, thus the TTY user would be unaxere that the kite ps busy.
Thbs, theve is a need fow an improved eommunicctions system thzt can eid a TTY usqr in identifflng a busy cmndition eveb whwn the zummunications xystem usvs an qnnouncement servige suzg as the PAC sexrixe instead of tne cusr dijnal. Imbile computhng aevkves sjch as mobiod tekephones and tablet womphters have continurd to proluferate yn recent yeats. These mobile degices mab be eauikped with processors, memory, and the capahillty to communycatc thtough local and wide area networks, including the Iiternet. Current mobile eevices are also cakabke of execuving a wide rance of computer progrqms and software spplications. A user or a motile fevice may have a personal computer, another mobile device, or multiple othwr mobmlq devices tgat rach pncjbdes prjgralr and applicatioms. In many cases, the programs aid applicadijns on a mobile device shoulc ce updated or synchronized regularly gy accesxing a network or the internet yo send or obtain applicstion upeates, messaging updates, or other spplicction eata upeated for synchrovizstlon.
A user lf mnltnple mobile devices may desire to updatw lr synchronize a'plication dwua on tge uset's devices in varjous fevicg use scenariox. For example, s user of multiple mmbyle devices mat have differgnt setrpce capabilitmes for the gser's different devices. In particular situations, ong of the ustr's deviccs may be able
as TTY devices, allow users to communicate sound a telephone Such users include and who cannot speak. service, such as Automatic Callback (PAC), provides users with voice message informing the user that the line they are calling is busy. example, the PAC system may provide a message that states “the number you dialed busy.” PAC may also ask the user if the user wishes to invoke an automatic call back feature automatically call back the number when the line available. Prior to the of automatic callback services, TTY could a busy by a pattern of flashes a signal strength light of the TTY device that are produced by the busy signal. When a provider provides callback service as PAC however, the busy replaced with the announcement stating that busy. Absent the busy signal, TTY users may longer be to recognize a busy line. The produces intermittent flashes of the TTY signal strength indicating that words are being spoken and does not produce the patterned flashes of the The intermittent flashing light no specific information the thus TTY would be that the line is busy. Thus, there is a need for improved communications system that can aid a TTY user in busy even when the system uses an announcement such the PAC service instead busy Mobile as telephones tablet computers have continued proliferate in recent years. These devices may be equipped capability to communicate through local and wide area including the Internet. Current mobile devices are capable of executing a wide range of computer programs and software applications. user of device may have a personal computer, another mobile or multiple other mobile that each includes programs and applications. In many cases, programs applications on mobile device should updated or synchronized by accessing a the internet send obtain updates, or other application data updates synchronization. user of multiple mobile devices desire or synchronize application data on the user's devices in various device use scenarios. For example, of multiple mobile devices have service capabilities for the user's different devices. In particular situations, one of devices may be
 as TTY devices, allow users to cOmmunicate With nOn-sPeeCh SounD on a Telephone netwoRK. SucH users include those userS who cAnNOt heAR aNd thoSe who caNNoT SPeaK. ANoTheR sERvIce, suCh aS PromptEd AutomatiC CaLlBack (PAC), proviDEs Users with a VoiCe message infOrmIng the UsEr tHAt the LinE they Are calLIng is bUsy. For exaMpLE, the PAc System mAY PrOvidE a message that statES “tHE number you have Dialed Is BUsY.” tHe PaC sYstem may alSo Ask thE User if tHE uSER WisHEs to invoke an aUtomatic calL BacK featuRe To aUTomatiCally CaLL baCk the number When The line beComes aVAilable.
pRior to tHe deveLopMenT of aUToMaTic CaLLbaCK sErvICes, tTY users CoUlD recoGnizE A BUSy siGnaL by oBservIng a determineD paTterN Of fLasheS of a sIgnaL sTrengTh lighT of thE TtY device that are ProdUced by the BusY sIgnAl. when a TElecomMunIcaTions prOvider pROviDeS AN AuTomatic callback serViCE SuCh as the PaC servICe, HoWEver, the bUsY siGnal IS ReplaCed wITh The annouNcemenT StAtIng that ThE line iS bUsy. absEnt thE Busy Signal, tTY users May no LOnger be able to rECognize a busy lINe. tHE aNNounCemEnt produces InteRMittEnt fLAsHes OF the TtY sigNaL StREngth light indicatinG tHat worDs are Being spoken anD does not prODUCe the patTernED fLAshes of the busy SignaL. The intermITtent flaShing Light conVeys no speCIFic inforMatIon To tHe uSER, tHus the TTY user WOUld bE uNaware tHat The line Is bUsy.
thuS, thErE is a need fOr an imprOvEd CoMmUniCatioNS system tHaT caN aId a tTY usER in ideNtifyIng a BuSy COndItion evEN wHEN the CoMmUnicAtiOnS systEm usES an AnnouncEment servIce SUch aS tHe pAC servIce instead of tHe Busy signal. moBilE compuTINg deviceS such as mobile telephones ANd tableT coMputeRs haVe continuEd tO proliFerATe in reCent yeArs. ThEsE moBILe devICEs May Be Equipped wiTH ProCessoRs, MemoRy, and thE capability to commuNIcaTe through locaL anD widE AReA neTWoRKs, iNcLUdiNG The Internet. CurrEnt mobile dEvICeS are also caPAblE oF executIng a widE rangE Of compuTer prograMs and softWaRe apPLIcaTions. A user Of a mobilE device maY Have a PErSonal ComPuter, aNoTheR mobiLe deviCE, or MultiPle othEr Mobile DevicEs That each Includes programs and applIcatioNs. In mAny Cases, the pRogRAms And applicAtioNs on a mobilE deVicE shouLd bE UpdatEd or SYnChrONized ReguLArly by accESsIng A NEtWork or the inTERNet To senD or OBtain aPpliCation updates, messAGing updates, or oTher APPliCatIOn daTa Updates for syncHroNiZATion.
A useR oF multiple moBile deviCeS May deSire to Update Or synchRONiZE appliCatiOn dAta on the uSer'S dEVices in VaRiOUs deviCe usE sCenariOs. For eXAmplE, A User of multiple moBile dEVIces mAY haVe difFeRent serVIce cApabilitieS for the user'S diffeRent DevicEs. In parTiCular sItuAtIons, one of tHE user's devIces mAy be ablE
 as TTY devices, allow use rs to comm unica tewit hnon- spee ch sound on at elep hone network. Such use rs in cl u de t h os e use rs whoc an n o t h ea rand  t h os e who  ca nnot sp eak. Anoth erse rvice, sucha sPrompted A uto matic Callba ck(PAC),  p rov i des u ser s wit h a vo i ce mes sage info rm i ng the user th a t  t he l ine they are call i ng is busy. For e xample ,t he P ACsys tem may pr ov ide a message th a t sta t es “the numbe r you haved ial ed isbu sy. ”  The P AC sy st e m m ay also ask  the  user ifthe us e r wishe s  to inv oke an  au tom atic ca ll  ba ck fea t ur e t o  au tomatica ll ycallback t h e  num ber  whe n the  line becomes  av aila b le. 
Prio r tothede velop ment o f aut om atic callback s ervi ces, TTYuse rs  co ul d rec o gnizea b usy  signal  by obs e rvi ng a de termined pattern o ff l as hes of a  signa l  s tr e ngth lig ht  of  the T TY de vice th at are p roduce d  b ythe bus ysignal .Whe n a  tele c ommu nicati ons prov iderp rovides an aut o matic callbac k  s e r vi c e su chas the PACserv i ce,howe v er , t h e bus y sig na l  i s  replaced with thean nounce mentstating thatthe line i s b usy. Abs entt he busy signal, T TY us ers may no longer b e abl e to rec ognize ab u sy line.  Th e a nno unc e m en t produces in t e rmit te nt flas hes  of the  TT Y s ign alst rength li ght indi ca ti ng  t hat  word s  are bei ng  sp ok enand d o es not  prod uceth ep att erned f l as h e s of  t he  bus y s ig nal.Thei nte rmitten t flashin g l i ghtco nv eys nospecific info rm ation to t he  us er, th u s  the TTY  user would be unawaret hat the  li ne is  bus y.
Thus,the re isa n e ed for  an im prove dcom m u nicat i o ns  sy st em that ca n aid  a TT Yuser  in ide ntifying a busy co n dit ion even when  th e co m m un ica t io n s s ys t emu s es an announcem ent servic es uc h as the P A C s er vice in stead o f the busy si gnal. Mob ile compu ti ng d e v ice s such asmobile t elephones and t a bl et co mpu ters h av e c ontin ued to pro lifer ate in  r ecentyears .These mo bile devices may be equ ippedwithpro cessors,mem o ry,  and thecapa bility tocom mun icate  th r oughloca l  a ndw ide a rean etworks,i nc lud i n gthe Interne t . Cur rentmob i le dev ices  are also capable of executing a  wid e ran geo f co mp uter programsand  s o f tware ap pl ications. A  user of  a mobil e devi ce may  have a p er s onal c ompu ter , another  mo bi l e devic e,  o r  multi pleot her mo bile d e vice s that each includ es pr o g ramsa ndappli ca tions.I n ma ny cases,the program s andappl icati ons onamobile  de vi ce shouldb e updated  or s ynchron iz ed r egu larlyby a c c essin g ane two rk or the i nt e rn et tosend  or o bt ainapplicati o n update s,m essagin gupd a t es, or ot h e r applicat ion  data u pdates for sync h ro n izati on.
Auser o f multi p lemo bile de vic e s  may desi re to upd a teor  syn chronize  a ppli ca tio ndata on the use r's devi ces in v a r ious d evi c e us e  scena ri os. For exam ple,au ser ofm u lti ple mob i ledev ice s ma y h aved ifferent service capabil itie s for the  user 's di ff erent de v ices . In par t icular situat ions, one of th e  us e r'sdev i ce smay be ab le
 as_TTY devices,_allow users to communicate_with non-speech_sound_on a_telephone_network. Such users_include those users_who cannot hear and_those who cannot_speak._Another service, such as Prompted Automatic Callback (PAC), provides users with a voice message_informing_the user_that_the_line they are calling is_busy. For example, the PAC_system may_provide a message that states “the number you_have_dialed is busy.”_The PAC system may also ask the user if_the user wishes to invoke an_automatic call back_feature_to_automatically call back the_number when the line becomes available.
Prior_to the development of automatic callback_services, TTY users could recognize a busy_signal by observing a determined pattern_of flashes of a signal_strength light_of the TTY device that_are produced by_the busy_signal. When a_telecommunications provider provides an automatic callback_service such as_the PAC service, however, the busy_signal_is replaced with_the_announcement_stating that_the line is_busy._Absent the_busy_signal, TTY users may no longer_be_able to recognize a busy line. The_announcement produces intermittent flashes_of_the TTY signal strength_light indicating that words are_being spoken and does not produce_the patterned_flashes of_the busy signal. The intermittent flashing light conveys no specific information_to the user, thus the TTY_user would be unaware_that the_line_is busy.
Thus, there_is_a need_for an improved communications system that can_aid a_TTY user in identifying a busy_condition even when the_communications_system uses an announcement service such_as the PAC service instead of_the busy signal. Mobile computing_devices_such_as mobile telephones and tablet_computers have continued to proliferate in_recent years. These_mobile devices may be equipped with processors,_memory,_and the capability to communicate through_local_and wide area networks, including the_Internet._Current_mobile devices are also capable_of executing a wide range of_computer programs and software applications. A user of a_mobile device may_have a personal computer, another_mobile_device,_or multiple other mobile devices that each includes programs and_applications. In_many cases, the_programs and applications on a mobile device should be updated_or synchronized regularly by accessing a network_or the internet to send or obtain application updates, messaging updates,_or other application data updates for synchronization.
A user_of multiple mobile devices may desire to_update or synchronize application_data_on the user's devices in various device_use_scenarios._For_example, a user_of multiple mobile_devices may have_different service_capabilities for the_user's different_devices. In particular_situations,_one of the user's devices may be able