MT90883 Zarlink Semiconductor, MT90883 Datasheet - Page 24

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

4.5
For smaller systems, the built-in TDM switch allows traffic to be switched out to a local resource pool on the line
card. The provision of a high bandwidth, 33 MHz PCI interface allows the processed data to be returned to the
MT90880 ready for transmission over the network (Figure 6). Alternatively, the Local TDM interface can be used
to return data to the MT90880 for transmission across the packet network.
The PCI interface on the MT90880 contains a DMA controller to simplify packet handling over the PCI bus. This
can read packets out of the system memory on the PCI bus and place them on the appropriate queue for
transmission.
Local Resource Pool Example
PSTN
data flow
T1/E1/
ISDN
Line Input Card
Figure 6 - Use of a Local Resource Pool
MT9076
Framer
Examples: HDLC,
Zarlink Semiconductor Inc.
MT90880/1/2/3
echo cancellers
voice codecs,
modem pool,
TDM
24
TDM
Processor
Resource
MT90880
TDM-IP
Local
Pool
PCI
Ethernet
Packet
Data Sheet