MT90883 Zarlink Semiconductor, MT90883 Datasheet - Page 45

• Manufacturer Part Number: MT90883
• Description: (MT90880 - MT90883) TDM to Packet Processors
• Manufacturer: Zarlink Semiconductor

6.2
The TDM switch is a non-blocking switch with 1024 bi-directional channels. It can be used both for routing WAN
traffic out to the local TDM interface, and for re-ordering timeslots on the way in or out of the device. Internally,
it provides four independent data directions, from WAN side to local side, local to WAN, WAN to WAN and local
to local. A multiplexing arrangement (see Figure 23) controls the access to the TDM switch, permitting the
following data flows through the device:
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Features include:
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The following flows are also possible, facilitating test modes in the system
WAN interface to Packet Interface direct (without going through the switch)
Packet Interface to WAN interface direct (without going through the switch)
WAN interface to Packet Interface via the TDM switch (e.g., for re-ordering timeslots on input)
Packet Interface to WAN interface via the TDM switch (e.g., for re-ordering timeslots on output)
WAN interface to Local interface, via the TDM switch
Local interface to WAN interface, via the TDM switch
Local interface to Packet Interface, via the TDM switch
Packet Interface to Local interface, via the TDM switch
WAN interface to WAN interface, looped back through the TDM switch
Local interface to Local interface, looped back through the TDM switch
Packet Interface to Packet Interface, looped back through the TDM switch
Fully bi-directional, 1,024-channel x 1,024-channel non-blocking switch
Accepts data rates of 2.048 Mbs, or 8.192 Mbs on the WAN interface side
Accepts data rates of 2.048 Mbs, 4.096 Mbs or 8.192 Mbs on the local interface side
Rate conversion between WAN and local streams
Per-stream bit delay for the local input streams
Per-stream bit advancement for the local output streams
Per-channel constant throughput delay
TDM Cross-Connect Switch
WAN Access
Interface
Local TDM Interface
Figure 23 - TDM Switch Access Multiplexers
1K x 1K switch
Zarlink Semiconductor Inc.
MT90880/1/2/3
45
WAN Receive
WAN Transmit
MT9088x
To Packet
Interface
Data Sheet