SBI Bus Serializer ASSP Telecom Standard Product Data Sheet
Released
Proprietary and Confidential to PMC-Sierra, Inc., and for its customers’ internal use.
Document No.: PMC-2000168, Issue 5
18
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Features
OC-12/STM-4 DS0, NxDS0, T1, E1, VT/TU/DS-3/E3/STS-1/AU-3 cross-connect and
SBI/TelecomBus serializer.
Quad byte wide 19.44MHz SBI bus to 777.6MHz serial SBI336S converter.
Byte wide 77.76MHz SBI336 bus to 777.6MHz serial SBI336S converter.
DS0, NxDS0, T1, E1, Transparent VT1.5 (TVT1.5), Transparent VT2 (TVT2), DS3 and E3
granular quad SBI to serial SBI336S switch. Supports subrate link switching with the
restriction that subrate links must be symmetric in both the transmit and receive directions.
DS0, NxDS0, T1, E1, Transparent VT1.5 (TVT1.5), Transparent VT2 (TVT2), DS3 and E3
granular SBI336 to serial SBI336S switch. Supports subrate link switching with the
restriction that subrate links must be symmetric in both the transmit and receive directions.
A byte wide 77.76MHz SBI336 bus interface can be used instead of the serial SBI336S
interface. All converter and switch capabilities can be used with the byte wide SBI
interface.
VT/TU channelized telecom bus to telecom bus converter and TDM switch.TelecomBus
Quad byte wide 19.44MHz telecom bus to serial 777.6MHz telecom bus converter.
Byte wide 77.76MHz telecom bus to serial 777.6MHz telecom bus converter.
VT/TU, STS/AU quad 19.44MHz telecom bus to serial telecom bus switch.
VT/TU, STS/AU 77.76MHz telecom bus to serial telecom bus switch.
A byte wide 77.76MHz telecom bus interface can be used instead of the serial telecom bus
interface. All converter and switch capabilities can be used with the byte wide telecom bus
interface.
With the Narrowband Switch Element, NSE, the SBS can be used to implement a DS0
granularity SBI Memory:Space:Memory switch scaleable to 20Gb/s. In telecom bus mode
a 20Gb/s VT/TU granularity Memory:Space:Memory switch can be implemented.
Integrates two independent DS0 granularity Memory Switches. One switch is placed
between the incoming 77.76MHz byte wide SBI336 bus (or quad multiplexed 19.44MHz
SBI buses) and the transmit working and protect Serial SBI336S link (or the 77.76MHz
byte wide transmit SBI336 bus). The transmit working and protect links transmit the same
data. The other switch is placed between the receive working or protect Serial SBI336S
link (or the 77.76MHz byte wide receive SBI336 bus) and the outgoing 77.76MHz byte
wide SBI336 bus (or quad multiplexed 19.44MHz SBI buses).
Nominal latency through the SBS in DS0 mode is 125uS. Channel Associated Signaling
(CAS) latency through the SBS in DS0 mode is two T1 multi-frame (6mS) or two E1 multi-
frame (4mS).
In telecom bus mode or SBI mode without DS0 level switching nominal latency through the
SBS is <15uS.
The Memory Switch permits any receive or incoming byte from an input port to be mapped
to any outgoing or transmit byte, respectively, on the associated output port