STANDARD PRODUCT
PM5365 TEMAP
DATASHEET
PMC-1991148
ISSUE 3
HIGH DENSITY VT/TU MAPPER
AND M13 MULTIPLEXER
SPEs. The bytes forming the various tributary synchronous payload envelopes
are identified by the LDTPL when set high. The LDV5 signal pulses high to mark
the V5 bytes of each outgoing tributaries. LDTPL and LDV5 are invalid when
LDPL is set low. The three STS-1 SPEs can each have different alignments to
the STS-3 transport envelope and the alignment is changing for two of the STS-1
SPEs (STS-1 #2 and #3) due to the pointer justification events shown.
Figure 45: Telecom DROP Bus Timing - STS-1 SPEs / AU3 VCs
LREFCLK
LDC1J1
••••
LDPL
LDV5
LDTPL
INVALID
INVALID
INVALID
INVALID
IV
IV
IV
IV
A1 A1 A1 A2 A2 A2 C1 C1 C1 J1 C2 H4 Vx
H1 H1 H1 H2 H2 H2 H3 H4 H3G1
V5
LDDATA[7:0]
STS-1 #1 SPE J1 byte
Negative stuff for STS-1 #2
SPE which happens to
carry a non-final H4 byte
Last H4 byte in
tributary multiframe
Positive stuff for STS-1 #3 SPE
V5 byte as marked by OTV5
Any V1 - V4 byte
TU#1, STS-1 #1
The LDV5 and LDTPL signals are optional when using the ingress VTPP within
the TEMAP which will regenerate the LDV5 and LDTPL signals from LDC1J1V1,
LDPL and the pointers within LDDATA[7:0]. In order to bypass the ingress VTPP,
the data on the Telecom drop bus must be locked such that all three STS-1
SPEs are aligned to the STS-3 transport envelope with the J1 bytes immediately
following the C1 bytes. This is shown in Figure 46.
Proprietary and Confidential to PMC-Sierra, Inc. and for its Customers’ Internal Use
192
PMC [ PMC-SIERRA, INC ]
