
Multi-Service Access Device For Channelized Interfaces
Telecom Standard Product Data Sheet
Production
Proprietary and Confidential to PMC-Sierra, Inc., and for its Customers’ Internal Use
Document ID: PMC-1990823, Issue 4
590
14.21.2 SIRP Modes of Operation
The remote alarm port RDI and REI values are sourced from an upstream SONET/SDH framer
such as the PM5315 Spectra-2488, the PM5313 Spectra-622, or the PM5316 Spectra-4x155.
Register Controlled Mode (TS
x
_RMODE[1:0] =b’00)
In this mode, REI[3:0] and RDI[1:0] are both sourced from internal registers TS
x
_REI[3:0] and
TS
x
_RDI[1:0] respectively. The remote alarm port is ignored as well as the RCFP’s and RTDP’s
loss-of-cell-delineation LCD alarms (which is mapped to a programmable RDI code).
Remote Alarm Input Only Mode (TS
x
_RMODE[1:0] =b’01)
In this mode, the REI and RDI values transmitted are sourced entirely from the remote alarm port.
Remote Alarm Input With Loss Of ATM Cell Delineation Input Mode
(TS
x
_RMODE[1:0] =b’10)
In this mode, the REI values are sourced from the remote alarm port and the RDI indication is
generated by the receive cell processor’s loss-of-cell delineation assertion state (which is mapped
to a programmable RDI code).
Normal Error Reporting Mode (TS
x
_RMODE[1:0] =b’11)
In this mode, the REI and RDI values are sourced from the remote alarm port. If the extended
RDI mode is enabled, the receive cell processor’s loss-of-cell delineation state, which is mapped
to a programmable RDI code if asserted, is compared with the remote port’s RDI code. The
higher priority RDI will take precedence.
14.22 PRBS Generator and Monitor (PRGM)
A pseudo-random (using the X
23
+X
18
+1 polynomial) or incrementing pattern can be
inserted/extracted in the SONET/SDH payload. It cannot be inserted into the ATM cell or packet
payload. With PRBS data and incrementing data patterns, the payload envelope is filled with
pseudo-random/incrementing bytes with the exception of POH and fixed stuff columns. In the
case of the incrementing counts, the count starts at 0 and increments to FFh before the count starts
over at 0 once again. The incrementing count is free to float within the payload envelope and
therefore the 0 count is not associated with any fixed location within a payload envelope.
The user has the option to monitor a programmable sequence in all the B1 byte positions. The
complement of these values are also monitored in the E1 byte positions.
This is used to check for
misconfiguration of STS-1 cross-connect fabrics. If a known STS-1 originated from a particular
STS-1 port, the source can be programmed to send a B1 pattern that would be monitored at the
other end.