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Technical Specifications
Issue 1 December 1997 10-3
Table 10-2. DS3 Performance Monitoring (PM) Mode
If provisioned in the VMR or VM modes (Table 10-2), DS3 P-bit violations and
SEFS are counted and the count is thresholded to flag detected performance
degradation of the DS3 signal incoming from the fiber.
■ Enhanced DS3 Performance Monitoring (see Table 10-14)
— CV-P Coding Violations
These errors are counted and thresholded independently for all DS3
interfaces provisioned in VM or VMR mode. When the F&M bit or
C-bit option is selected, network elements (NE) could be
provisioned in VMR or VM mode. See Table 10-3.
Table 10-3. Enhanced DS3 Performance Monitoring Modes
— Errored Seconds (ES-P)
ES-P are not counted during UAS. ES-P are counted and
thresholded independently for each DS3 path terminated by the
system.
Monitor P-Bits Correct P-Bits
VMR mode Yes Yes
VM mode Yes No
CC mode No No
Mode
PM
Option
Monitor
P-Bits
Monitor
F&M Bits
Monitor
C-Bits
Correct
P-Bits
Correct
F&M Bits
Correct
C-Bits
Monitor
Line PM
VMR P-bit Yes No No Yes No No Yes
VMR F&M-bit No Yes No Yes No No Yes
VMR C-bit No No Yes Yes No No Yes
VM P-bit Yes No No No No No Yes
VM F&M-bit No Yes No No No No Yes
VM C-bit No No Yes No No No Yes
CC P-bit No No No No No No Yes
CC F&M-bit No No No No No No Yes
CC C-bit No No No No No No Yes
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