XRT94L43
98
REV. 1.0.2
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
C20
STS3RxD_Alarm_0
EG_DS3E3_FP_0
TxSTS1FP_0
O
CMOS
STS-3/STM-1 Receive (Drop) Telecom Bus - Alarm Indicator Output
signal - Channel 0; Egress Direction DS3/E3 Frame Generator Block
Framing Pulse Output pin - Channel 0; Transmit STS-1 Framing
Pulse Output pin - Channel 0:
This output pin pulses "high", coincident with any STS-1 signal (that is
being output via the "STS3RXD_D_0[7:0]" output pins) that is carrying an
AIS-P indicator.
This output pin is "low" for all other conditions.
If STS-3/STM-1 Telecom Bus (Channel 0) has been enabled - STS-3/
STM-1 Receive Telecom Bus - Alarm Indicator Output signal:
This output pin pulses "high", coincident with any STS-1 signal (that is
being output via the "STS3RXD_D_0[7:0]" output pins) that is carrying an
AIS-P indicator.
This output pin is "low" for all other conditions.
If STS-3/STM-1 Telecom Bus (Channel 0) is disabled then the func-
tion of this output pin depends upon whether Channel 0 has been
configured to operate in either the DS3/E3 or STS-1 Modes
If Channel 0 is configured to operate in the DS3/E3 Modes -
EG_DS3E3_FP_0 (Egress Direction - DS3/E3 Framing Pulse Output
pin - Channel 0):
If the STS-3/STM-1 Telecom Bus (Channel 0) is disabled and if Channel
0 is configured to operate in either the DS3 or E3 Modes then this pin will
function as the "Egress Direction DS3/E3 Framing Pulse" output pin.
In this mode, the Frame Generator block (associated with Channel 0) will
pulse this output pin "HIGH" for one DS3/E3 bit-period, coincident with
the first bit (within a given DS3 or E3 frame) being output via the "DS3/
E3/STS1_Data_OUT_0" output pin.
If Channel 3 is configured to operate in the STS-1 Mode -
TxSTS1_FP_3 (Transmit Direction - STS-1 Framing Pulse Output pin
- Channel 3):
If the STS-3/STM-1 Telecom Bus (Channel 0) is disabled and if Channel
0 is configured to operate in the STS-1/STM-0 Mode, then this pin will
function as the "Transmit Direction STS-1 Framing Pulse" output pin.
In this mode, the Transmit STS-1 TOH Processor block (associated with
Channel 0) will pulse this output pin "HIGH" for one STS-1 bit-period,
coincident to whenever the very first bit (within a given STS-1 frame)
being output via the "DS3/E3/STS1_DATA_OUT_0" output pin.
N
OTE
:
For those applications in which the XRT94L43 is being interfaced
to DS3/E3/STS-1 LIU devices, we recommend that the user NOT
connect this output pin to any LIU input pin.
E25
STS3RxD_Alarm_1
RxDS3FP_1
TxSTS1FP_1
O
CMOS
STS-3/STM-1 Receive (Drop) Telecom Bus - Alarm Indicator Output
signal - Channel 1; DS3/E3 Frame Synchronizer Framing Pulse Out-
put Pin - Channel 1:
See description for Pin # C20 above using the appropriate channel num-
bers.
If STS-3/STM-1 Telecom Bus (Channel 1) has been enabled - STS-3/
STM-1 Receive Telecom Bus - Alarm Indicator Output signal:
If STS-3/STM-1 Telecom Bus (Channel 1) is disabled then the func-
tion of this output pin depends upon whether Channel 1 has been
configured to operate in either the DS3/E3 or STS-1 Modes
STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
P
IN
#
S
IGNAL
N
AME
I/O
S
IGNAL
T
YPE
D
ESCRIPTION