很多同学经常搞不清GB50312-2016标准的规定测试参数，或者说和测试设备对不上号。特意从标准中摘抄出来，供大家参考。

ACR-F(Attenuation to Crosstalk Ratio at the Far-end) 衰减远端串音比

ACR-N(Attenuation to Crosstalk Ratio at the Near-end)衰减近端串音比

d. c. (Direct Current Loop Resistance)直流环路电阻

ELTCTL(Equal Level TCTL)两端等效横向转换损耗

FEXT[Far End Crosstalk Attenuation Closs)]远端串音

IL(Insertion Loss) 插入损耗

NEXT[Near End Crosstalk Attenuation Closs)] 近端串音

OLT(Optical Line Terminal)光线路终端

OLTS(Optical Loss Test Set)光损耗测试

OTDR (Optical Time Domain Reflectometer) 光时域反射

PS NEXT[Power Sum Near End Crosstalk Attenuation Closs)] 近端串音功率和

PS AACR-F(Power Sum Attenuation to Alien Crosstalk Ratio at the Far-end) 外部远端串音比功率
和

PS AACR-Favg( Average Power Sum Attenuation to Alien Crosstalk Ratio at the Far-end) 外部远
端串音平均值比功和

PS ACR-F(Power Sum Attenuation to Crosstalk Ratio at the Far-end) 衰减远端串音比功率和

PS ACR-N (Power Sum Attenuation to Crosstalk Ratio at the Near-end) 衰减近端串音比功率和

PS ANEXT[Power Sum Alien Near-End CrosstalkCloss)] 外部近端串音功率和

PS ANEXTavg[Average Power Sum Alien Near-End Crosstalk Closs)] 外部近端串音平均值功率和

PS FEXT(Power Sum Far End Crosstalk) 远端串音功率和

RL(Return Loss) 回波损耗

TCL(Transverse Conversion Loss) 横向转换损耗

TCTL(Transverse Conversion Transfer Loss) 横向转换转移损耗