PM5366-PI PMC-Sierra, Inc., PM5366-PI Datasheet - Page 182
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PM5366-PI
Manufacturer Part Number
PM5366-PI
Description
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER AND M13 MULTIPLEXER
Manufacturer
PMC-Sierra, Inc.
Datasheet
1.PM5366-PI.pdf
(267 pages)
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PRELIMINARY
DATASHEET
PMC-2010672
12.9 DS3 and E3 Loopback Modes
PROPRIETARY AND CONFIDENTIAL
LIUs
LIUs
Telecom Bus
Telecom Bus
D3M A
D3M D
VTPP
VTPP
M 13
M 13
M 13
M 13
Figure 21
The TEMAP-84 provides two E3 and three DS3 M13 multiplexer loopback
modes to aid in network and system diagnostics at the DS3 interface. The DS3
loopbacks can be initiated via the µP interface whenever the DS3 framer/M13
multiplexer is enabled. The DS3 and E3 Master Data Source register controls the
DS3 loopback modes. These loopbacks are also available when the DS3 mux is
used with the DS3 mapper via the telecom bus interface.
DS3 and E3 Diagnostic Loopback
DS3 and E3 Diagnostic Loopback allows the transmitted DS3 or E3 stream to be
looped back into the receive DS3 or E3 path, overriding the DS3 or E3 stream
received on the RDAT/RPOS and RNEG/RLCV inputs. The RCLK signal is also
substituted with the transmit DS3 clock, TCLK. While this mode is active, AIS
may be substituted for the DS3 payload being transmitted on the TPOS/TDAT
and TNEG/TMFP outputs. The configuration of the receive interface determines
how the TNEG/TMFP signal is handled during loopback: if the UNI bit in the DS3
FRMR register is set, then the receive interface is configured for RDAT and
RLCV, therefore the TNEG/TMFP signal is suppressed during loopback so that
transmit MFP indications will not be seen nor accumulated as input LCVs. If the
UNI bit is clear, then the interface is configured for bipolar signals RPOS and
RNEG, therefore the TNEG is fed directly to the RNEG input. This diagnostic
M 13
M 13
M 13
M 13
DS3/E3
DS3/E3
TRAN
FRM R
RTOP/
TTOP
RTTB
M 13
M 13
M 13
M 13
M 13
DS3/E3 Rx System I/F
M 13
DS3/E3 Tx System I/F
- T1/E1 Diagnostic Digital Loopback
TRAP
M 13
M 13
M 13
M 13
M 13
M 13
ISSUE 1
PISO
SIPO
M 13
RTDM
INSBI
EXSBI
M 13
(byte)
TTM P
(byte)
M 13
M 13
(bit)
(bit)
Diagnostic
Loopback
170
JAT84
T1/E1
T1/E1
JAT84
FRM R84
HIGH DENSITY 84/63 CHANNEL VT/TU MAPPER
T1/E1
B/W Port
B/W Port
Flexible
Flexible
Ingress
Egress
EXSBI
INSBI
AND M13 MULTIPLEXER
PM5366 TEMAP-84
SBI 155
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