PM5363 TUPP+622
TUPP+622
DATASHEET
PMC-1981421
ISSUE 4
SONET/SDH TRIBUTARY UNIT PAYLOAD PROCESSOR FOR 622 MBIT/S
INTERFACES
Register 18H: STP VTPP #2 Configuration #2
Bit
Type
Function
Default
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
R/W
R/W
R/W
R/W
TUGBYP
PIBYP
NOIC1J1PLBYP
H4SQL
0
0
0
0
Unused
Unused
Unused
Unused
X
X
X
X
This register is used to configure the major operational modes of VTPP #2.
H4SQL:
The H4 squelch enable (NOIC1J1PLBYP) bit controls the insertion of the H4
byte in the outgoing STS-1 #2 (TUG3 #2). When H4SQL is set high, an all
zeroes byte is inserted in the H4 position of the outgoing data stream. When
H4SQL is set low, normal tributary multiframe sequence in accordance with
the corresponding OTMF signal is inserted in the H4 byte of the outgoing data
stream.
NOIC1J1PLBYP:
The no IC1J1 and IPL bypass (NOIC1J1PLBYP) bit controls the bypassing of
the corresponding IC1J1 and IPL signals to the OC1J1V1 and OPL outputs,
respectively, when TUGEN is set low or bridge monitoring is enabled in STS-1
#2 (TUG3 #2). When NOIC1J1PLBYP is set low, the IC1J1 and IPL in the
incoming data stream are transferred to the outgoing data stream unmodified.
The amount of delay from the incoming to the outgoing data stream is a
function of the internal data-path pipeline delay and GSCLK_FP input. See
the bypass functional timing diagram for details. When NOIC1J1PLBYP is set
high, IC1J1 and IPL are not bypassed, OC1J1V1 and OPL are generated
signals. NOIC1J1PLBYP is ignored when TUGEN is set high or bridge
monitoring is disabled in STS-1 #2 (TUG3 #2).
PROPRIETARY AND CONFIDENTIAL TO PMC-SIERRA, INC., AND FOR ITS CUSTOMERS’ INTERNAL USE
165
PMC [ PMC-SIERRA, INC ]
