Maxim Integrated DS21Q55 User Manual
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The device fully meets all of the latest E1 and T1 specifications, including the following:
§ ANSI:
T1.403-1995, T1.231-1993, T1.408
§ AT&T:
TR54016, TR62411
§ ITU:
G.703, G.704, G.706, G.736, G.775, G.823, G.932, I.431, O.151, O.161
§ ETSI:
ETS 300 011, ETS 300 166, ETS 300 233, CTR4, CTR12
§ Japanese:
JTG.703, JTI.431, JJ-20.11 (CMI coding only)