PM4328-PI PMC-Sierra, Inc., PM4328-PI Datasheet - Page 169

• Manufacturer Part Number: PM4328-PI
• Description: Framer, T1|E1|T3 Standard Format, 324-BGA
• Manufacturer: PMC-Sierra, Inc.

STANDARD PRODUCT
DATASHEET
PMC-2011596
PROPRIETARY AND CONFIDENTIAL
Figure 39: DS3 Line Loopback Diagram
DS2 Demultiplex Loopback
DS2 Demultiplex Loopbacks allow each of the seven demultiplexed DS2 streams
to be looped back into the MX23 and multiplexed up into the transmit DS3
stream. This overrides the tributary DS2 streams coming from the MX12s. The
DS2 loopback mode is shown diagrammatically in Figure 40 and is enabled via
the MX23 Loopback Activate register.
Figure 40: DS2 Loopback Diagram
.
RNEG/
RPOS/
TNEG/
TPOS/
RNEG/
RPOS/
TNEG/
RCLK
RDAT
RLCV
TMFP
TPOS/
TCLK
TDAT
DS2 Tributary Loopback path
RCLK
RDAT
RLCV
TMFP
TCLK
TDAT
FRMR
TRAN
DS3
DS3
ISSUE 1
FRMR
TRAN
DS3
DS3
MX23
MX23
156
DEMUX AIS
Optional
Insertion
F
R
M
R
R
M
R
F
R
M
R
F
MX12 #1
R
M
R
F
MX12 #2
R
M
R
F
MX12 #3
R
M
R
F
MX12 #4
F
R
M
R
MX12 #5
MX12 #6
MX12 #7
F
R
M
R
R
M
R
F
HIGH DENSITY T1/E1 FRAMER
R
M
R
F
MX12 #1
R
M
R
F
MX12 #2
AND M13 MULTIPLEXER
R
M
R
F
MX12 #3
R
M
R
F
MX12 #4
PM4328 TECT3
F
R
M
R
MX12 #5
MX12 #6
MX12 #7