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STANDARD PRODUCT
PM8315 TEMUX
DATASHEET
PMC-1981125
ISSUE 7
HIGH DENSITY T1/E1 FRAMER WITH
INTEGRATED VT/TU MAPPER AND M13 MUX
PROPRIETARY AND CONFIDENTIAL
257
Figure 66 shows the function of the TEMUX telecom ADD bus when operating in
AU4 mode. In AU4 mode, the position of the single J1 byte and the VC4 is
implicitly defined by the LAC1 byte position. The VC4 is defined to be aligned to
the AU4 transport envelope such that the J1 byte occupies the first available
payload byte after the C1 byte. No pointer justification events take place on the
ADD bus. LAC1J1V1 pulses high to mark the first C1 byte, the J1 byte and the
third byte after J1 of the first tributary in the AU4 stream. LAPL identifies the
payload bytes on LADATAD[7:0].
Figure 66
- Output Bus Timing - Locked AU4 VC Case
LREFCLK
LAC1
LAOE
LAPL
LAC1J1V1
Implicit location
of VC4 J1 byte
First R column of TUG3 #1
V1 byte TU #1, TUG2 #1, TUG3 #1
LADATA[7:0]
A2 C1 X
X
H4
J1
National
bytes
V5
V1
Last H4 byte
in tributary
multiframe
V5 byte TU #1,
TUG2 #1, TUG3 #1
Fixed
Stuff
Columns
R
R R
R
R R
R
R R R
R R
Z6
Z6 byte TU #1,
TUG2 #1, TUG3 #3
13.5 SONET/SDH Serial Alarm Port Timing
The timing relationships of the signals related to the remote serial alarm port are
shown in Figure 67. The remote serial alarm port clocks, RADEASTCK and
RADWESTCK, are nominally 9.72 MHz clocks but can range from 1.344 MHz to
10 MHz. The remote serial alarm port frame pulses, RADEASTFP and
RADWESTFP, mark the first BIP-2 error bit (B1 in Figure 67) of the first tributary
(TU #1 of TUG2 #1, TUG3 #1) on RADEAST and RADWEST, respectively. The
frame pulses must be set high to mark every first BIP-2 error bit of the first
tributary. Tributaries on RADEAST and RADWEST are arranged in the order of
transmission of an STM-1 stream as defined in the references. I.e., TU #1 of