PM8621-BI PMC-Sierra, Inc., PM8621-BI Datasheet - Page 28

• Manufacturer Part Number: PM8621-BI
• Description: Driver, NSE/SBS Narrowband Chipset Driver
• Manufacturer: PMC-Sierra, Inc.

Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-2021248, Issue 1
Figure 4: NSE/SBS Tributary Naming Convention for TeleCombus and SBI336 Bus
Chipset Loopback State
Figure 5: NSE/SBS Switching Fabric – Loopback State
The loopback state (Figure 5) can be viewed as the “point of reference” for the state of the
switching fabric. The CSD initializes the system to this state by default at the beginning. An API
is also available to upper layer application to aid in bringing the fabric to this loopback state at
any time. Doing so wipes out all the existing connections.
STS-3 #
TCB
OCTLIU
TEMUX84
TEMUX84
STS-1 #
1
2
3
4
TEMAP
84
Line Interface
Line Interface
Line Interface
1
2
3
1
2
3
1
2
3
1
2
3
SBS-Lite
SBS-Lite
SBS-Lite
VT Group #
1
4
7
1
5
7
VT1.5 #3
VT1.5 #1
VT1.5 #2
VT1.5 #4
VT3 #1
VT3 #2
Space Switch Fabric
VT2 #1
VT2 #2
VT2 #3
VT2 #1
VT2 #2
VT2 #3
VT6
VT3 #1
VT3 #2
NSE-20G
NSE-20G
SBI
336
SBI Bus #
data loopback
1
2
3
4
Narrowband Chipset Device Driver Manual
SPE #
1
2
3
1
2
3
1
2
3
1
2
3
SBS-Lite
SBS
Narrowband Chipset Overview
Service Module
Service Module
FREEDM336
AAL1gator32
T1 #28 (CAS)
TVT1.5 #28
E1 #1
TVT1.5 #1
T1 #1
E1 #21
TVT2 #21
DS3
TVT2 #1
28