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Selecting Test Features
Setting PDH Spare Bits
Setting PDH Spare Bits
Description Certain Spare Bits will cause the occurrence of a minor alarm when
received as a logical "0".:
140 Mb/s - FAS Bit 14
34 Mb/s - FAS Bit 12
8 Mb.s - FAS Bit 12
2 Mb/s - NFAS Timeslot (timeslot 0 of NFAS frame) Bit 0
HOW TO: 1 If SONET interface is chosen, set up the SONET transmit interface
and payload required. See “Description” page 6.
If PDH interface is chosen, set up the PDH transmit interface and
payload required. See “Setting PDH Transmit Interface” page 2.
2 Set the value of the spare bits required for testing.
If a BIT SEQUENCE is required, choose SEND SEQUENCE [ON] to
transmit the sequence.
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