PM8621 PMC-Sierra, Inc., PM8621 Datasheet - Page 140

• Manufacturer Part Number: PM8621
• Description: NSE-8G Standard Product Data Sheet Preliminary
• Manufacturer: PMC-Sierra, Inc.

12.3.2
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2010850, Issue 1
Figure 20 CAS Multiframe Timing
Frame Alignment
Figure 21 Switch Timing DSOs with CAS
SBS#2 RC1FP.INT
SBS#2 OC1FP.INT
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.
SBS#2 OCMP.INT
SBS#1 IC1FP.INT
SBS#1 TCMP.INT
SBI frame time
NSE RC1FP.INT
SBI Frame Time
E1 multiframe
T1 multiframe
NSE CMP.INT
Internal Sigs
All CMPs
All CMPs
C1FP
C1FP
0us
0us
E1 signaling MF #1
T1 Signaling MF #1
E1 signaling MF #2
2500us
250us
NSE-8G™ Standard Product Data Sheet
T1 Signaling MF #2
E1 signaling MF #3
5000us
Preliminary
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