EI2 Electrical interface signal 2 048 kbit/s　2048kbit/s電接口信號(hào)
    E31 Electrical inte4ace signal 34 368 kbit/s　34368kbit/s電接口信號(hào)
    E4 Electrical inte4ace signal 139264kbit/s電接口信號(hào)
    EBC Errored Block Count 　 誤碼塊計(jì)數(shù)
    EDC Error Detection Code 誤碼檢測碼
    EDCV 　Error Detection Code Violation 誤碼檢測碼違倒
    EMF Equipment Management Function 設(shè)備管理功能
    EQ Equipment 設(shè)備
    ES Electrical Section 電氣段，電段
    ESl Electrical Section ,levell STM-1電段
    ES Errored Second 誤碼秒
    Eq Recommendation G.703 type 　G.703類型電接口，
     　 electrical signal, 　q表示比特率等級(jí)
     　bit rate order q
     (q = 1l, 12,21,22,31,32,4) q = 1l, 12,21,22, 31,32,4
    ExSL Expected Signal label 期望信號(hào)標(biāo)識(shí)
    ExTT Expected Trace Identifier 　 期望蹤跡識(shí)別符