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XRT94L43
239
SONET/SDH OC-12 TO 12XDS3/E3 MAPPER
REV. 1.0.2
V21
STS3RxD_Alarm_2
RxDS3FP_2
TxSTS1FP_2
O
CMOS
STS-3/STM-1 Receive (Drop) Telecom Bus - Alarm Indica-
tor Output signal - Channel 2; DS3/E3 Frame Synchronizer
Framing Pulse Output Pin - Channel 2:
The function of this output pin depends upon whether or not
theSTS-3/STM-1 Telecom Bus Interface for Channel 2 has
been enabled.
If STS-3/STM-1 Telecom Bus (Channel 2) has been enabled
- STS-3/STM-1 Receive Telecom Bus - Alarm Indicator Out-
put signal:
This output pin pulses "High", coincident with any STS-1 signal
(that is being output via the STS3RXD_D_2[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 2) is disabled -
RxDS3FP_2 (Receive DS3 Frame Pulse Input/Output -
Channel 2):
If the STS-3/STM-1 Telecom Bus (Channel 2) is disabled and if
the DS3/E3 Framer block is enabled then this pin will function
as the Receiving Framing Reference output pin. In this mode,
the Frame Synchronizer block (associated with Channel 2) will
pulse this output pin "High" for one DS3/E3 bit-period, coinci-
dent with the first bit (within a given DS3 or E3 frame) being
output via the DS3/E3/STS1_Data_OUT_2 output pin.
NOTE: This pin is inactive if the Frame Synchronizer block,
associated with Channel 2 is by-passed.
AD21
STS3RxD_Alarm_3
RxDS3FP_3
TxSTS1FP_3
O
CMOS
STS-3/STM-1 Receive (Drop) Telecom Bus - Alarm Indica-
tor Output signal - Channel 3; DS3/E3 Frame Synchronizer
Framing Pulse Output Pin - Channel 3:
The function of this output pin depends upon whether or not
theSTS-3/STM-1 Telecom Bus Interface for Channel 3 has
been enabled.
If STS-3/STM-1 Telecom Bus (Channel 3) has been enabled
- STS-3/STM-1 Receive Telecom Bus - Alarm Indicator Out-
put signal:
This output pin pulses "High", coincident with any STS-1 signal
(that is being output via the STS3RXD_D_3[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 3) is disabled -
RxDS3FP_3 (Receive DS3 Frame Pulse Input/Output -
Channel 3):
If the STS-3/STM-1 Telecom Bus (Channel 3) is disabled and if
the DS3/E3 Framer block is enabled then this pin will function
as the Receiving Framing Reference output pin. In this mode,
the Frame Synchronizer block (associated with Channel 3) will
pulse this output pin "High" for one DS3/E3 bit-period, coinci-
dent with the first bit (within a given DS3 or E3 frame) being
output via the DS3/E3/STS1_Data_OUT_3 output pin.
NOTE: This pin is inactive if the Frame Synchronizer block,
associated with Channel 3 is by-passed.
STS-3/STM-1 TELECOM BUS INTERFACE - RECEIVE DIRECTION
PIN #SIGNAL NAME
I/O
SIGNAL
TYPE
DESCRIPTION