Datasheet

DS2155
61 of 238
Table 10-B. E1 Alarm Criteria
ALARM SET CRITERIA CLEAR CRITERIA
ITU
SPECIFICATION
RLOS
An RLOS condition exists on power-up
prior to initial synchronization, when a
resync criteria has been met, or when a
manual resync has been initiated by
E1RCR1.0
RCL 255 or 2048 consecutive 0s received as
determined by E1RCR2.0
At least 32 1s in 255-bit times
are received
G.775/G.962
RRA
Bit 3 of nonalign frame set to 1 for three
consecutive occasions
Bit 3 of nonalign frame set to
0 for three consecutive
occasions
O.162
2.1.4
RUA1
Fewer than three 0s in two frames (512
bits)
More than two 0s in two
frames (512 bits)
O.162
1.6.1.2
RDMA
Bit 6 of time slot 16 in frame 0 has been set
for two consecutive multiframes
V52LNK Two out of three Sa7 bits are 0 G.965