S/UNI®-JET Data Sheet
Released
The Transmit E1 Stream diagram (Figure 44) illustrates the generation of E1 frame alignment
indicators on TOHM when the S/UNI-JET is configured for E1 PLCP or non-PLCP frame
formats. The S/UNI-JET flywheels using its internal timeslot counter to generate TOHM. The
ATM cell stream is inserted in TDATO, along with a framing bit placeholder every 256 bit
periods. An upstream E1 framer (such as the PM6341A E1XC or PM6344 EQUAD) must be used
to insert the appropriate E1 framing pattern. Note: TCLK is a flow through version of TICLK; a
variable propagation delay exists between these two signals.
Figure 45 Transmit Bipolar DS3 Stream
TICLK
TCLK
TPOS
TNEG
1
1
0
0
0
1
0
The Transmit Bipolar DS3 Stream diagram (Figure 45) illustrates the generation of a bipolar DS3
stream. The B3ZS encoded DS3 stream is present on TPOS and TNEG. These outputs, along with
the transmit clock, TCLK, can be directly connected to a DS3 line interface unit. Note: TCLK is a
flow through version of TICLK; a variable propagation delay exists between these two signals.
Figure 46 Transmit Unipolar DS3 Stream
TICLK
TCLK
Nib 1
Bit 4
Nib 21
Bit 1
Nib 22
Bit 4
Nib 1190
Bit 1
Nib 1
Bit 4
X1
X2
X1
TDATO
TOHM
The Transmit Unipolar DS3 Stream diagram (Figure 46) illustrates the unipolar DS3 stream
generation. The ATM cell stream, along with valid DS3 overhead bits is contained in TDATO.
The TOHM output marks the M-frame boundary (the X1 bit) in the transmit stream. Note: TCLK
is a flow through version of TICLK; a variable propagation delay exists between these two
signals.
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990267, Issue 3
303
PMC [ PMC-SIERRA, INC ]
