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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
575
SER_PRT_SEL allows selection of data from the working and protection serial TelecomBus links
on a per-STS-1 timeslot granularity to be routed to the S/UNI-MACH48 core. When
SER_PRT_SEL is logic 1, the system-side timeslot (see Table 52 and Table 53) associated with
the TSOUT[3:0] and DOUTSEL[1:0] bits in the IWTI Indirect Address register will come from a
protection link (RPPROT[x]/RNPROT[x]) via the IPTI block. When SER_PRT_SEL is logic 0,
the associated system-side timeslot will come from a working link (RPWRK[x]/RNWRK[x]) via
the IWTI block.
SER_PRT_SEL changes take place immediately. It does not wait for transport frame boundaries.
14.11 Setting up Channels for Different Link Rates
The S/UNI-MACH48 can process ATM, POS, and HDLC traffic for DS3, STS-1/STM-0, STS-
3c/STM-1, STS-12c/STM-4c, and STS-48c/STM-16c traffic rates. To take advantage of all the
automated features in the S/UNI-MACH48, the system side timeslots should be configured
symmetrically between the transmit and receive paths. If required, the STSI blocks, IWTI, IPTI,
OWTI, and OPTI can be used to rearrange line side timeslots to appropriate system side timeslots
on an STS-1/STM-0 basis.
System side timeslots and system side channel numbers are integrally linked. The timeslots
referred to are those on the system side of the IWTI, IPTI, OWTI, and OPTI blocks and are those
which are directly processed by the RCAS12, TCAS12, TCFP, RCFP, RTDP, TTDP, SIRP,
PRGM, and all the DS3 blocks.
Timeslot locations are illustrated in Table 52 and Table 53. Refer to Sections 12.5 and 12.6 for
information on how RCAS-12 and TCAS-12 timeslots are linked to those shown in Table 52 and
Table 53.
STS-48c/STM-16c traffic occupies all the line side timeslots, system-side timeslots, and
channel number 0 on the system side.
STS-12c/STM-4c traffic occupies 12 line-side timeslots and 12 system-side timeslots which
are part of the same TelecomBus set. A set starts at timeslots S1,1, S5,1, S9,1 or S13,1 as
shown in Table 52 and Table 53. Valid sets are labeled in Table 7 and Table 9. The set
starting at system-side timeslot S1,1 must be allocated to channel number 0. Likewise, the
set starting at system-side timeslot S5,1 must be allocated to channel number 12. The set
starting at system-side timeslot S9,1 must be allocated to channel number 24 and the set
starting at system-side timeslot S13,1 must be allocated to channel number 36.
STS-3c/STM-1 traffic occupies 3 line-side timeslots and 3 system-side timeslots which are
spaced 4 apart as shown in Table 51 and Table 52. Valid sets are labeled in Table 7 and Table
9. The set residing in the same stream as system-side timeslot S1,1 must be allocated to a
channel number between 0 and 11. Likewise, a set residing in the same stream as system-side
timeslot S5,1 must be allocated to a channel number between 12 and 23. A set residing in the
same steam as system-side timeslot S9,1 must be allocated to a channel number between 24
and 35 and a set residing in the same stream as system-side timeslot S13,1 must be allocated
to a channel number between 36 and 47.