Professional Standard - Post and Telecommunication
Status
2009-12
Latest
YD/T 657-1994
Scope
This standard specifies the quality level and requirements of 139264kbit/s optical transceivers. This standard applies to 139264kbit/s optical transceivers and is the basis for assessing the quality level of 139264kbit/s optical transceivers. This standard does not apply to product sorting.
YD/T 657-1994 history
1994YD/T 657-1994 Optical transmitter and receiver operating at 139264kbit/s Criteria for quality grading