A 
Address                                   地址 
Address decoding mechanism 地址编译码 
Address signal                         地址信号 
Analog exchange                     模拟交换机 
Analog line modual                  模拟线路模块 
Analog trunk interface             模拟中继接口 
Analog transmission                模拟传输 
Analog-digital converter          模拟－数字转换 
Application package                 应用软件包 
Asynchronous MODEM             异步调制解调器 
Attendant console                   话务台 
Attendant lock-out                   话务台闭锁 
Attendant transfer                   话务台转接 
ATM                                          异步传输模式 
Automatic wake-up                 自动叫醒 
Automatic ring back                 自动回叫 

B 
Backup battery                        后备电池  
Battery charge indicator          电池充电指示 
Baud rate                                波特律 
Billing records                          帐务记录 
Bit                                            比特 
Blockout                                   闭锁 
Breakdown of system              系统瘫痪 
Busy tone                                忙音 

C 
Cable                                       电缆 
Call waiting                              呼叫等待 
Channel                                   信道 
Charge signal                          计费信号 
Clock                                        时钟 
Codec                                      编译码 
Command code                       指令代码 
Common control system          通用控制系统 
Communication interface         通信接口 
Computer communication network计算机通信网络 
Control circuit                          控制电路 

D 
Data base administration        数据库管理 
Date network                          数据网络 
Date terminal                          数据终端 
Date transmission                   数据传输 
DDN                                         数字数据网 
Decoder                                   解码器 
Defective hardware                 硬件保护 
Detailed fault report                故障报告 
Diagnosis program                  诊断程序 
Dial tone                                 拨号音 
Dial-up circuit                          拨号电路 
Direct inward dialing(DID)       直接拨入 
Direct outward dialing(DOD)   直接拨出 
Dual tone multi-frequency(DTMF)双音多频信号 

E 
Extension                               分机 
Expansion subrack                 扩展机架 
External memory                    外部存储器

F 
Fault detection                       故障监测 
Fault dictionary                      故障指示 
Fault isolation                        故障隔离 
Fault repair                            故障修理 

G 
Ground detection                   接地保护 
Guard circuit                           保护电路 

H 
Hot stand by                            热待机 
Hotel management system     宾馆管理系统 

I 
I/O controller                          输入/输出控制 
I/O devices                             输入/输出设备 
I/O operations                        输入/输出操作 
Interface adaptor                   接口适配器 
ISDN                                       综合业务数字网 

K 
Key pad                                 键盘 

L 
Lift off the hook                     摘机 
Line link                                 链路 
Line polarity reversal            反极线路 
Link                                        链路 
Loader                                   装载 

M 
Main distribution frame(MDF) 主配线架 
Man-machine communication interface 人机通信接口 
Man-machine dialog               人机对话 
Master clock                           主时钟 
Memory                                  内存 
Menu mode                            菜单模式 
Minor alarm                            次要告警 
Monitoring                              监控 
Multi-frequency processor board多频处理板 

N 
Night service                          夜间服务 

O 
Off-line programs                   脱机程序 
On-hook                                 挂机 
On-line testing                       联机测试 
On-site testing                       现场测试 
Optic fiber transmission         光纤传输 
Over voltage protection         过压保护 
Over current protection         过流保护 

P 
Parameter                             参数 
Parity bit                               校验位 
Peripheral cabinet                 外围设备 
Port handling                         端口 
Power and alarm unit            电源及告警单元 
Power down switch               电源开关 
Printout                                 打印输出 
PABX                                     专用用户交换机 

R 
Redundancy                          备用设备 
Release                                 释放 
Ringback tone                       回铃音 
Ringer                                   振铃器 
Remote diagnosis                 远程诊断 

S 
SDH                                      同步数字系统 
Signal unit                            信号单元 
Signalling                              信令 
Software bug                        软件故障 
Software initialization           软件初始化 
Standard I/O interface         标准输入输出接口 
System alarm                       系统告警 
System diagram                   系统图 
System initialize                   系统初始化 
System management           系统管理 

T 
TCP/IP                                  传输协议/网络互联协议 
Terminal                               终端 
Time slot                              时隙 
Trunk                                   中继 

W 
Wideband switching            宽带交换