Rainbow Electronics DS21458 User Manual
Page 240
DS21455/DS21458 Quad T1/E1/J1 Transceivers
240 of 270
Figure 36-13. Receive Side Boundary Timing, RSYSCLK = 1.544MHz
(With Elastic Store Enabled)
NOTES:
1) Data from the E1 channels 1, 5, 9, 13, 17, 21, 25, and 29 is dropped (channel 2 from the E1 link is
mapped to channel 1 of the T1 link, etc.) and the F-bit position is added (forced to one).
2) RSYNC in the output mode (IOCR1.4 = 0).
3) RSYNC in the input mode (IOCR1.4 = 1).
4) RCHBLK is programmed to block channel 24.
RSER
CHANNEL 23/31
CHANNEL 24/32
CHANNEL 1/2
RCHCLK
RCHBLK
RSYSCLK
RSYNC
2
3
RSYNC
1
RMSYNC
LSB
F
MSB
MSB
LSB
4
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