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PE
Simple vs. Enhanced NSP
DXC
E1/T1 trunk
E1/T1 trunk
IWF
F
R
A
M
E
R
CE
CE
IWF
F
R
A
M
E
R
PE
CESoPSN PW
A PE with an extended NSP
Internal TDM trunk
Part of the extended NSP.
Applies downstream trunk conditioning
PPT Version