PA:Power Amphfier 功率放大器
PA:Power Amplifier 功率放大器
PABX:Private Auntomatic Branch Exchange 程控?cái)?shù)字自動(dòng)交換機(jī)
Paging :無線呼叫系統(tǒng)
PAL:Pinhole Alc Lons 針孔型自動(dòng)亮度控制鏡頭
PARK:Portable Access Rights Key 移動(dòng)用戶接入權(quán)限識別碼
PAS:Public Address System 公共廣播音響系統(tǒng)
PBX:Private Brancn exchange 程控用戶交換機(jī)
PC:Pan unit&control 云臺及云臺控制器
PC:Proximinty Card 接近卡
PCM:Pulse Code Modulation 脈沖編碼調(diào)制
PCS:Personal Communication Service個(gè)人通訊服務(wù)
PDFA:Praseodymium-Doped Fiber Amplifier 摻鐠光纖放大器
PDH:Plesiochronous digital Hierarchy 準(zhǔn)同步數(shù)字系列
PDN:Public data network 公用數(shù)據(jù)網(wǎng)
PDS:Premises Distribution Systemn建筑物結(jié)構(gòu)化綜合布線系統(tǒng)
PF:Pressurization Fan 加壓風(fēng)機(jī)
PG:Pressure Gradient 壓差式
PID:Passire Infrared Detector 被動(dòng)式紅外傳感器
PJE:Pointer Justification Event 指針調(diào)整事件
PLC:Programmerable Logic Controller 可編程控制器
PM:Power Matching 功率匹配
PMS:Prooerty Management system 資源管理系統(tǒng)
PO:Pressure Operated 壓強(qiáng)式
POH:Path Overhead 通道開銷
PPI:PDH Physical InterfacePDH物理接口
Preamplification :前置放大
PRI:Primany Rate Interface 基群速率接口
PRM:Patter Recogniton Method模式識別法
PSC:Protection Switching Count 保護(hù)倒換計(jì)數(shù)
PSD:Photoelectric Smoke Detector 光電感煙探測器
PSD:Protection Switching Duration保護(hù)倒換持續(xù)時(shí)間
PSK:Phase Shift Keying 移相鍵控
PSNT：Ponver Sum Next 綜合近端串?dāng)_
PSPDN:Packet switched Public Data Network 公眾分組交換網(wǎng)
PSTN:Public Switch Telephone Network 公用交換電話網(wǎng)
PU:Pick Up 拾音器
PVC:Polyvingl chloride 聚氯乙烯
PVCS:Public video conferring system 公用型會(huì)議電視系統(tǒng)
PWS:Power system 電源系統(tǒng)
PA:Power Amplifier 功率放大器
PABX:Private Auntomatic Branch Exchange 程控?cái)?shù)字自動(dòng)交換機(jī)
Paging :無線呼叫系統(tǒng)
PAL:Pinhole Alc Lons 針孔型自動(dòng)亮度控制鏡頭
PARK:Portable Access Rights Key 移動(dòng)用戶接入權(quán)限識別碼
PAS:Public Address System 公共廣播音響系統(tǒng)
PBX:Private Brancn exchange 程控用戶交換機(jī)
PC:Pan unit&control 云臺及云臺控制器
PC:Proximinty Card 接近卡
PCM:Pulse Code Modulation 脈沖編碼調(diào)制
PCS:Personal Communication Service個(gè)人通訊服務(wù)
PDFA:Praseodymium-Doped Fiber Amplifier 摻鐠光纖放大器
PDH:Plesiochronous digital Hierarchy 準(zhǔn)同步數(shù)字系列
PDN:Public data network 公用數(shù)據(jù)網(wǎng)
PDS:Premises Distribution Systemn建筑物結(jié)構(gòu)化綜合布線系統(tǒng)
PF:Pressurization Fan 加壓風(fēng)機(jī)
PG:Pressure Gradient 壓差式
PID:Passire Infrared Detector 被動(dòng)式紅外傳感器
PJE:Pointer Justification Event 指針調(diào)整事件
PLC:Programmerable Logic Controller 可編程控制器
PM:Power Matching 功率匹配
PMS:Prooerty Management system 資源管理系統(tǒng)
PO:Pressure Operated 壓強(qiáng)式
POH:Path Overhead 通道開銷
PPI:PDH Physical InterfacePDH物理接口
Preamplification :前置放大
PRI:Primany Rate Interface 基群速率接口
PRM:Patter Recogniton Method模式識別法
PSC:Protection Switching Count 保護(hù)倒換計(jì)數(shù)
PSD:Photoelectric Smoke Detector 光電感煙探測器
PSD:Protection Switching Duration保護(hù)倒換持續(xù)時(shí)間
PSK:Phase Shift Keying 移相鍵控
PSNT：Ponver Sum Next 綜合近端串?dāng)_
PSPDN:Packet switched Public Data Network 公眾分組交換網(wǎng)
PSTN:Public Switch Telephone Network 公用交換電話網(wǎng)
PU:Pick Up 拾音器
PVC:Polyvingl chloride 聚氯乙烯
PVCS:Public video conferring system 公用型會(huì)議電視系統(tǒng)
PWS:Power system 電源系統(tǒng)