M28529G-12 Mindspeed Technologies, M28529G-12 Datasheet - Page 30

• Manufacturer Part Number: M28529G-12
• Description: ATM IMA 8.192Mbps 1.8V/3.3V 484-Pin BGA
• Manufacturer: Mindspeed Technologies

Specifications of M28529G-12

• Package: 484BGA
• Utopia Type: Level 2
• Typical Operating Supply Voltage: 1.8|3.3 V
• Minimum Operating Supply Voltage: 1.71|3.135 V
• Maximum Operating Supply Voltage: 1.89|3.465 V
• Maximum Output Rate: 8.192 Mbps

1.4.2
Digital Subscriber Line Access Multiplexers (DSLAM) and Broadband Loop Carriers (BLC) are being deployed to
provide broadband services to business and residential customers. Although DSL and T1/E1 services delivers
higher speeds than traditional dial-up connections, customers are increasingly finding the need for higher
bandwidth than is available through a single DSL or T1/E1 line. The IMA protocol helps bridge the gap between
lower cost xDSL solutions and higher cost lines such as T3. IMA allows customers to scale their bandwidth needs
in T1/E1 or xDSL link increments, so they do not have to pay for more than they can use.
Figure 1-5
can use the M28529 32-port IMA controller with the octal M28985 DSL modem chip for the customer access side.
The CX28225 4-port IMA can be used in the DSL CPE equipment to complete the solution for providing flexible
bandwidth scaling.
On the network side, DSLAMs generally need to backhaul customer traffic to the ATM backbone. This can be done
by bonding multiple T1s together using IMA. This line card is also shown in
once again with Mindspeed's CX28395 16-port framers and CX28380 quad LIUs. A similar line card is needed at
the ATM/Multiservice Switch.
Figure 1-5.
1.4.3
Wireless Base Transceiver Stations (BTS) and NodeB equipment for 3G based networks have a need to send
customer's compressed voice/data from the base station to the Radio Network Controller (RNC). Many times, high
speed fiber links are not available where the equipment is deployed. By using IMA to bond multiple T1 or E1 links
together, the traffic can be backhauled effectively and efficiently.
Figure 1-6
for 16 to 32-port applications. The CX28398 framer and CX28380 complete the line card. The RNC can aggregate
traffic from multiple base sites, so the M28529 can be used here. Again, the CX28395 16-port framer and CX8380
quad LIUs can be used to complete the line card solution.
28529-DSH-001-K
shows a typical example of how IMA can be used to meet the evolving needs of customers. The DSLAM
illustrates the NodeB/RNC example. The NodeB can either use a CX28229 for 8-ports or the M28529
M28529 in DSLAM applications
DSLAM
Wireless NodeB/RNC
Modem (UADSL, G.Lite)
Splitter-less ADSL
CX28985
CX28985
CX28985
CX28985
CX28380
CX28380
CX28380
CX28380
CX28380
CX28380
CX28380
CX28380
DSL
DSL
DSL
DSL
CX28380
CX28380
CX28380
CX28380
LIU
LIU
LIU
LIU
LIU
LIU
LIU
LIU
LIU
LIU
DSLAM Access line card
LIU
LIU
Utopia
Utopia
CPE
CPE
Controller
Controller
Controller
Controller
M28529
M28529
M28529
M28529
IMA
IMA
IMA
IMA
Mindspeed Proprietary and Confidential
Mindspeed Technologies
CO/Street Cabinet
CO/Street Cabinet
Utopia
Utopia
Device
Device
Device
Device
Layer
Layer
ATM
ATM
Layer
Layer
ATM
ATM
DSLAM
DSLAM
nxT1/E1
links
Device
Device
Layer
ATM
Layer
ATM
DSLAM Uplink card or ATM Switch card
Utopia
®
Controller
Controller
M28529
M28529
IMA
IMA
Serial
CO
CO
Figure
CX28395
CX28395
Framer
Framer
1-4. The M28529 can be used
Serial
ATM Switch
ATM Switch
Functional Description
CX28380
CX28380
LIU
x8
LIU
x8
15