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PM8621 Datasheet(PDF) 140 Page - PMC-Sierra, Inc |
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PM8621 Datasheet(HTML) 140 Page - PMC-Sierra, Inc |
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140 / 184 page  NSE-8G™ Standard Product Data Sheet Preliminary Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use 139 Document ID: PMC-2010850, Issue 1 Figure 20 CAS Multiframe Timing T1 Signaling MF #1 T1 Signaling MF #2 E1 signaling MF #1 E1 signaling MF #2 E1 signaling MF #3 E1 0us 2500us 5000us C1FP All CMPs Frame Alignment SBI frame time T1 multiframe E1 multiframe Figure 21 Switch Timing DSOs with CAS 0us 250us C1FP All CMPs SBI Frame Time Internal Sigs SBS#1 IC1FP.INT NSE RC1FP.INT SBS#2 RC1FP.INT SBS#2 OC1FP.INT SBS#1 TCMP.INT NSE CMP.INT SBS#2 OCMP.INT 12.3.2 SBS/NSE-8G Systems Switching DS0s without CAS This is very similar to the DS0 switching system configuration with CAS described in the previous section. The only difference is that in this system the global C1FP can be reduced to every SBI multiframe rather than the longer 48-frame SBI bus signaling multiframe. The advantage is that there is less latency when making switch configuration changes via the CMP signals. |
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