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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
8
14
Operation.................................................................................................................558
14.1
S/UNI-MACH48 Conceptual Regions.............................................................558
14.2
Serial TelecomBus (LVDS) Operation ............................................................559
14.2.1
Character Alignment ..........................................................................559
14.2.2
Frame Alignment................................................................................560
14.2.3
Character Decode..............................................................................560
14.2.4
Character Encode..............................................................................561
14.3
TelecomBus MST and HPT Modes.................................................................561
14.4
DS3 PLCP Frame Format...............................................................................562
14.5
DS3 Frame Format.........................................................................................565
14.6
SONET/SDH Frame Mappings.......................................................................566
14.6.1
ATM Mapping.....................................................................................566
14.6.2
Packet over SONET Mapping............................................................567
14.6.3
Transport and Path Overhead Bytes Used by the S/UNI-MACH48 ..567
14.7
ATM Cell Data Structure.................................................................................569
14.8
POS/HDLC Data Structure .............................................................................569
14.8.1
Limitation When Using Externally Generated FCS in STS-48c Mode570
14.8.2
Limitations on Small Packets.............................................................570
14.9
Setting up Timeslot Assignments in the IWTI, IPTI, OWTI, and OPTI ...........571
14.9.1
Standard Line-Side Timeslot Map......................................................571
14.9.2
Required System-Side Timeslot Map for Sub-STS-48c/STM-16c Data Streams
571
14.9.3
Required System-Side Timeslot Map for STS-48c/STM-16c Data Streams
572
14.9.4
Custom Timeslot Mappings and Movement of Timeslots Associated With a
Channel..............................................................................................573
14.9.5
Active and Standby Pages in the STSI Blocks ..................................574
14.10
Using RWSEL and SER_PRT_SEL ...............................................................574
14.11
Setting up Channels for Different Link Rates .................................................575
14.11.1
Example Set-up: ................................................................................576
14.12
Dynamically Reprovisioning Channels to Different Rates..............................578
14.13
RXSDQ and TXSDQ FIFO Size Configuration...............................................579
14.14
RXSDQ and TXSDQ Dynamic Reconfiguration.............................................581
14.15
TXSDQ Buffer Available Operation ................................................................582
14.16
RXSDQ and TXSDQ Data Available and Burst-Size Operation.....................583
14.17
RXPHY POS-PHY L3 Servicing .....................................................................584