switched services 中文意思是什麼
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Adsl technology can literally transform the existing public information network from one limited to voice, text and low - resolution graphics to a system capable of bringing simultaneous switched digital video and other advanced, interactive services to everyone ' s office or home
Adsl技術確確實實地能把現有的、局限於傳輸聲音、文本和低解析度圖形的公共信息網改造成能同時將交換的數字視頻和其它高級互動式服務帶到每個人的辦公室或家庭的系統。 -
Telecommunications - network performance parameters for circuit switched digital services - definitions and measurements
電信.線路開關數字服務的網路性能參數.定義和測量 -
Packet - switched signalling system between public networks providing data transmission services
提供數據傳輸業務的公用網之間的分組交換信令系統 -
While ss7 deals with non - circuit switched data ( messages are transported without a dedicated circuit established for that purpose ), the function of the isdn - up ( isup ) is to control the circuit - switched voice or data connection services
Ss7是處理非電路交換數據（傳輸消息時，沒有建立用於該目的的專用電路）的，而isdn - up （ isup ）則實現控制電路交換語音或數據連接業務的功能。 -
Integrated services digital network ( isdn ) - switched network providing end - to - end digital connection for simultaneous transmission of voice and / or data over multiple multiplexed communication channels and employing transmission that conforms to internationally - defined standards
綜合服務數字網路- -是一種使用符合國際規定標準的開關網路，通過多路復合通訊頻道，提供端至端的數字連接，實現聲音或/和數據的同時傳送。 -
Switched multimegabit data services
交換式多兆比特數據業務 -
Sis switched internetworking services
交換式網路互聯服務 -
Telecommunication - digital subscriber signalling system number 1 - layer 3 signalling specification for circuit - switched bearer services
電信.第1號數字用戶信號系統.線路轉換載體服務的第3層信令規范 -
Recover the spectrums first. when analogue transmission had been switched off, then deploy more frequencies for additional multiplexes of sfn or mfn and allowing more capacity for programme providers and additional services
當模擬輸送終止后，騰空出的頻譜可為節目供應商及附加服務供應商提供更多頻譜容量，以推出額外的單頻網路或多頻網路數碼頻道。 -
Another issue is that the current network was built for circuit - switched services
另一個問題是，目前的網路是為電路交換服務而建立起來的。 -
Starting from 1 january 2003, all fixed and mobile network operators are required to comply with the billing and metering integrity scheme ( bmis ) if they offer time and usage services such as international direct dial ( idd ) service and mobile services utilizing the public switched telephone networks
由二零零三年一月一日起，所有固定及流動網路營辦商，如果提供按時間及用量計帳的服務，如國際直撥電話（ idd ）服務及行動電話服務，均須遵從準確按時計帳計劃。 -
The available spectrum and the number of multiplexes available for licensing after analogue services had been switched off
當模擬服務終止后，可供應用的頻譜數量及發出數碼電視頻道平臺牌照的數量。 -
To require the two multiplex licensees as mentioned in paragraph 2. 21 to carry the existing free - to - air analogue television channels free of charge until the analogue services are switched off ( paragraph 7. 7 )
21段所述兩條數碼頻道的持牌機構免費傳送現有的免費模擬電視服務，直至模擬服務被數碼服務取締為止（第7 -
It ' s ca11ed data service access system. from physica1 v1ew, it extends the interfaces of ddn services to remote customer ' s sides by sp30 and its transm1ssion network. it forma1ly combines ddn and pstn ( pub1 ic switched te1ephone network ) into one cabinet and makes popu1arization of ddn pos s ib l e
從物理概念上講，數據業務接入系統相當于把ddn的業務介面通過sp30交換機及其傳輸網路延伸到遠端用戶側，從形式上使ddn和pstn （ publicswitchedtelephonenetwork ）網二網合一，為ddn網的進一步普及創造了條件。 -
The limited number of sites and unattractive charges are problems arose in the process of operators and icps deploying the service and the restrictions on the terminals mostly refer to the small - sized displays of the handsets and the inconvenience of entering characters through the keyboard, which are manufacturers problems. as to slow connectivity, it seems to be the weakness of wap. however, the fact is that there is a limit of 9600 bits on the circuit - switched data services provided by the gsm network and this is the very bearer mode that is currently selected by wap established on the network layer. this only means that people do not accept wap over csd
站點少、資費並不具吸引力等缺點是運營商與icp在對該業務推廣的過程中所顯現的問題；來自於終端的限制則是手機製造商的問題，雖然各大廠商都推出了支持wap的手機，但用戶的批評大都集中在手機屏幕太小及輸入不方便；至於連接速度慢，這似乎是wap本身的缺陷，但事實是gsm網路所能提供的基於電路交換的數據業務存在9600bits的限制，而建立在網路層之上的wap目前選擇的恰恰是這種承載方式，因此只能說wapovercsd這種業務提供模式人們不能接受。
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