电信局专用大对数通信电缆-MHYA大对数电缆电信局专用大对数通信电缆-MHYA大对数电缆电信局的大对数线序，大对数语音电缆线序    ，通信电缆线序色谱，HYA通信电缆线序色谱认识表  

大对数语音电缆线序  

基本以25对为基本单元，线缆有五个基本颜色，顺序分别为白、红、黑、黄、紫，每个基本颜色里面又包括五种颜色顺序分别为蓝、橙、绿、棕、灰，即所有的线对1～25对的排序为白蓝、白橙、白绿、白棕、白灰;红蓝、红橙、红绿、红棕、红灰;……紫蓝、紫橙、紫绿、紫棕、紫灰。  


1对—白兰                        2对—白桔                                3对—白绿                        4对—白棕                            5对—白灰  
6对—红兰                        7对—红桔                                8对—红绿                        9对—红棕                        10对—红灰  
11对—黑兰                12对—黑桔                            13对—黑绿                    14对—黑棕                        15对—黑灰  
16对—黄兰                17对—黄桔                            18对—黄绿                    19对—黄棕                        20对—黄灰  
21对—紫兰                22对—紫桔                            23对—紫绿                    24对—紫棕                        25对—紫灰